./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.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 deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 14:24:51,984 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 14:24:52,057 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 14:24:52,061 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 14:24:52,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 14:24:52,093 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 14:24:52,094 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 14:24:52,094 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 14:24:52,095 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 14:24:52,096 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 14:24:52,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 14:24:52,097 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 14:24:52,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 14:24:52,098 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 14:24:52,099 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 14:24:52,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 14:24:52,099 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 14:24:52,099 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 14:24:52,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 14:24:52,100 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 14:24:52,104 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 14:24:52,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 14:24:52,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 14:24:52,105 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 14:24:52,105 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 14:24:52,105 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 14:24:52,105 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 14:24:52,106 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 14:24:52,106 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 14:24:52,106 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 14:24:52,106 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 14:24:52,106 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 14:24:52,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:24:52,107 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 14:24:52,107 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 14:24:52,107 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 14:24:52,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 14:24:52,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 14:24:52,108 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 14:24:52,110 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 14:24:52,110 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 14:24:52,110 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 14:24:52,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 [2024-11-08 14:24:52,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 14:24:52,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 14:24:52,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 14:24:52,416 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 14:24:52,417 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 14:24:52,425 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2024-11-08 14:24:53,776 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 14:24:53,935 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 14:24:53,936 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2024-11-08 14:24:53,943 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f626b659/53181be0927f467d8544a134078e4180/FLAGd56605a95 [2024-11-08 14:24:54,337 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f626b659/53181be0927f467d8544a134078e4180 [2024-11-08 14:24:54,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 14:24:54,341 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 14:24:54,344 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 14:24:54,344 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 14:24:54,348 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 14:24:54,349 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,349 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b014a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54, skipping insertion in model container [2024-11-08 14:24:54,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,372 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 14:24:54,541 WARN L250 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_unwindbound50.c[490,503] [2024-11-08 14:24:54,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:24:54,581 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 14:24:54,600 WARN L250 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_unwindbound50.c[490,503] [2024-11-08 14:24:54,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:24:54,629 INFO L204 MainTranslator]: Completed translation [2024-11-08 14:24:54,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54 WrapperNode [2024-11-08 14:24:54,630 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 14:24:54,631 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 14:24:54,631 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 14:24:54,631 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 14:24:54,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,646 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,667 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 86 [2024-11-08 14:24:54,668 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 14:24:54,669 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 14:24:54,669 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 14:24:54,669 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 14:24:54,678 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,680 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,692 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]. [2024-11-08 14:24:54,692 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,692 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,696 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,699 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,700 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,701 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,703 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 14:24:54,703 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 14:24:54,704 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 14:24:54,704 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 14:24:54,705 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (1/1) ... [2024-11-08 14:24:54,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:24:54,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:24:54,752 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) [2024-11-08 14:24:54,755 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 [2024-11-08 14:24:54,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 14:24:54,802 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-08 14:24:54,803 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-08 14:24:54,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 14:24:54,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 14:24:54,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 14:24:54,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 14:24:54,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 14:24:54,872 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 14:24:54,875 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 14:24:55,055 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-08 14:24:55,055 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 14:24:55,069 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 14:24:55,070 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 14:24:55,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:24:55 BoogieIcfgContainer [2024-11-08 14:24:55,070 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 14:24:55,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 14:24:55,073 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 14:24:55,076 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 14:24:55,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 02:24:54" (1/3) ... [2024-11-08 14:24:55,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6508e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:24:55, skipping insertion in model container [2024-11-08 14:24:55,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:24:54" (2/3) ... [2024-11-08 14:24:55,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6508e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:24:55, skipping insertion in model container [2024-11-08 14:24:55,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:24:55" (3/3) ... [2024-11-08 14:24:55,079 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound50.c [2024-11-08 14:24:55,095 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 14:24:55,095 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 14:24:55,160 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 14:24:55,167 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;@7f2b9f07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 14:24:55,196 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 14:24:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 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) [2024-11-08 14:24:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-08 14:24:55,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:24:55,212 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:24:55,213 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:24:55,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:24:55,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2024-11-08 14:24:55,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:24:55,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267088577] [2024-11-08 14:24:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:55,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:24:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:55,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:24:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:55,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:24:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:55,433 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:24:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:55,438 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:24:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:24:55,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:24:55,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267088577] [2024-11-08 14:24:55,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267088577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:24:55,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:24:55,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 14:24:55,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120719406] [2024-11-08 14:24:55,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:24:55,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 14:24:55,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:24:55,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 14:24:55,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:24:55,481 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 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 5.0) internal successors, (10), 2 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), 2 states have call successors, (4) [2024-11-08 14:24:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:24:55,502 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2024-11-08 14:24:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 14:24:55,504 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (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 28 [2024-11-08 14:24:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:24:55,509 INFO L225 Difference]: With dead ends: 65 [2024-11-08 14:24:55,509 INFO L226 Difference]: Without dead ends: 30 [2024-11-08 14:24:55,511 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 [2024-11-08 14:24:55,514 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:24:55,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:24:55,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-08 14:24:55,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-08 14:24:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 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) [2024-11-08 14:24:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-11-08 14:24:55,547 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2024-11-08 14:24:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:24:55,547 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-11-08 14:24:55,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (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) [2024-11-08 14:24:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-11-08 14:24:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 14:24:55,549 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:24:55,549 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] [2024-11-08 14:24:55,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 14:24:55,550 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:24:55,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:24:55,550 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2024-11-08 14:24:55,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:24:55,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924968299] [2024-11-08 14:24:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:55,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:24:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:55,705 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:24:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:55,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:24:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:55,724 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:24:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:55,736 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:24:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:24:55,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:24:55,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924968299] [2024-11-08 14:24:55,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924968299] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:24:55,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:24:55,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 14:24:55,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861258551] [2024-11-08 14:24:55,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:24:55,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 14:24:55,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:24:55,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 14:24:55,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:24:55,750 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-08 14:24:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:24:55,783 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-08 14:24:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 14:24:55,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 29 [2024-11-08 14:24:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:24:55,787 INFO L225 Difference]: With dead ends: 40 [2024-11-08 14:24:55,787 INFO L226 Difference]: Without dead ends: 32 [2024-11-08 14:24:55,788 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 [2024-11-08 14:24:55,789 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:24:55,789 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:24:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-08 14:24:55,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-08 14:24:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 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) [2024-11-08 14:24:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2024-11-08 14:24:55,802 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2024-11-08 14:24:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:24:55,803 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2024-11-08 14:24:55,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-08 14:24:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2024-11-08 14:24:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 14:24:55,804 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:24:55,805 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] [2024-11-08 14:24:55,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 14:24:55,805 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:24:55,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:24:55,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2024-11-08 14:24:55,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:24:55,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783091580] [2024-11-08 14:24:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:55,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:24:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:56,004 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:24:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:56,011 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:24:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:56,040 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:24:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:56,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:24:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 14:24:56,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:24:56,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783091580] [2024-11-08 14:24:56,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783091580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:24:56,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634690467] [2024-11-08 14:24:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:56,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:24:56,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:24:56,063 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) [2024-11-08 14:24:56,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 14:24:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:56,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 14:24:56,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:24:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:24:56,357 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:24:56,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634690467] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:24:56,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:24:56,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-11-08 14:24:56,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39054106] [2024-11-08 14:24:56,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:24:56,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 14:24:56,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:24:56,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 14:24:56,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-08 14:24:56,359 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-08 14:24:56,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:24:56,466 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2024-11-08 14:24:56,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 14:24:56,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 30 [2024-11-08 14:24:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:24:56,468 INFO L225 Difference]: With dead ends: 49 [2024-11-08 14:24:56,468 INFO L226 Difference]: Without dead ends: 47 [2024-11-08 14:24:56,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-08 14:24:56,469 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:24:56,469 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:24:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-08 14:24:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2024-11-08 14:24:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 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) [2024-11-08 14:24:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2024-11-08 14:24:56,493 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 30 [2024-11-08 14:24:56,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:24:56,493 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2024-11-08 14:24:56,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-08 14:24:56,493 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2024-11-08 14:24:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-08 14:24:56,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:24:56,494 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, 1] [2024-11-08 14:24:56,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 14:24:56,698 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 [2024-11-08 14:24:56,699 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:24:56,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:24:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2024-11-08 14:24:56,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:24:56,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341526383] [2024-11-08 14:24:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:56,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:24:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:24:56,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784433472] [2024-11-08 14:24:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:56,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:24:56,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:24:56,729 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) [2024-11-08 14:24:56,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 14:24:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:56,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 14:24:56,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:24:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:24:56,894 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:24:56,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:24:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341526383] [2024-11-08 14:24:56,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:24:56,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784433472] [2024-11-08 14:24:56,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784433472] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:24:56,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:24:56,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:24:56,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875453304] [2024-11-08 14:24:56,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:24:56,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:24:56,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:24:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:24:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:24:56,905 INFO L87 Difference]: Start difference. First operand 45 states and 63 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, (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) [2024-11-08 14:24:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:24:56,988 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2024-11-08 14:24:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:24:56,988 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, (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 32 [2024-11-08 14:24:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:24:56,992 INFO L225 Difference]: With dead ends: 66 [2024-11-08 14:24:56,992 INFO L226 Difference]: Without dead ends: 64 [2024-11-08 14:24:56,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:24:56,994 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:24:56,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:24:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-08 14:24:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2024-11-08 14:24:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 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) [2024-11-08 14:24:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2024-11-08 14:24:57,010 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 32 [2024-11-08 14:24:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:24:57,011 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2024-11-08 14:24:57,011 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, (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) [2024-11-08 14:24:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2024-11-08 14:24:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 14:24:57,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:24:57,012 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, 1] [2024-11-08 14:24:57,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 14:24:57,213 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 [2024-11-08 14:24:57,213 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:24:57,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:24:57,214 INFO L85 PathProgramCache]: Analyzing trace with hash -910809492, now seen corresponding path program 1 times [2024-11-08 14:24:57,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:24:57,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141581730] [2024-11-08 14:24:57,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:57,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:24:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:57,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:24:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:57,327 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:24:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:57,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:24:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:57,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:24:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:57,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-08 14:24:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 14:24:57,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:24:57,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141581730] [2024-11-08 14:24:57,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141581730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:24:57,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666139791] [2024-11-08 14:24:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:57,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:24:57,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:24:57,377 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) [2024-11-08 14:24:57,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 14:24:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:57,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 14:24:57,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:24:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:24:57,546 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:24:57,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666139791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:24:57,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:24:57,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-08 14:24:57,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194420652] [2024-11-08 14:24:57,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:24:57,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:24:57,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:24:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:24:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-08 14:24:57,548 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2024-11-08 14:24:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:24:57,612 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2024-11-08 14:24:57,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:24:57,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 35 [2024-11-08 14:24:57,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:24:57,615 INFO L225 Difference]: With dead ends: 63 [2024-11-08 14:24:57,615 INFO L226 Difference]: Without dead ends: 59 [2024-11-08 14:24:57,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-08 14:24:57,617 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:24:57,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 142 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:24:57,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-08 14:24:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-11-08 14:24:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 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) [2024-11-08 14:24:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2024-11-08 14:24:57,635 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 35 [2024-11-08 14:24:57,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:24:57,637 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2024-11-08 14:24:57,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2024-11-08 14:24:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2024-11-08 14:24:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 14:24:57,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:24:57,638 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, 1] [2024-11-08 14:24:57,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 14:24:57,839 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 [2024-11-08 14:24:57,839 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:24:57,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:24:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2024-11-08 14:24:57,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:24:57,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644985453] [2024-11-08 14:24:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:57,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:24:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:57,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:24:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:57,900 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:24:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:57,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:24:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:57,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:24:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:24:57,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:24:57,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644985453] [2024-11-08 14:24:57,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644985453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:24:57,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:24:57,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:24:57,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858067191] [2024-11-08 14:24:57,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:24:57,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:24:57,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:24:57,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:24:57,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:24:57,913 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2024-11-08 14:24:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:24:57,937 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2024-11-08 14:24:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:24:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 35 [2024-11-08 14:24:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:24:57,940 INFO L225 Difference]: With dead ends: 84 [2024-11-08 14:24:57,940 INFO L226 Difference]: Without dead ends: 58 [2024-11-08 14:24:57,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:24:57,941 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:24:57,942 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:24:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-08 14:24:57,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-08 14:24:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 39 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) [2024-11-08 14:24:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2024-11-08 14:24:57,960 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 35 [2024-11-08 14:24:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:24:57,960 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2024-11-08 14:24:57,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2024-11-08 14:24:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2024-11-08 14:24:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-08 14:24:57,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:24:57,961 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, 1] [2024-11-08 14:24:57,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 14:24:57,962 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:24:57,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:24:57,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2024-11-08 14:24:57,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:24:57,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133824237] [2024-11-08 14:24:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:57,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:24:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:24:57,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43563797] [2024-11-08 14:24:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:57,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:24:57,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:24:57,992 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) [2024-11-08 14:24:57,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 14:24:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:58,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 14:24:58,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:24:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 14:24:58,234 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:24:58,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:24:58,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133824237] [2024-11-08 14:24:58,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:24:58,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43563797] [2024-11-08 14:24:58,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43563797] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:24:58,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:24:58,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:24:58,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785121050] [2024-11-08 14:24:58,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:24:58,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:24:58,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:24:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:24:58,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:24:58,237 INFO L87 Difference]: Start difference. First operand 58 states and 75 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, (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) [2024-11-08 14:24:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:24:58,298 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-11-08 14:24:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:24:58,301 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, (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 47 [2024-11-08 14:24:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:24:58,303 INFO L225 Difference]: With dead ends: 65 [2024-11-08 14:24:58,303 INFO L226 Difference]: Without dead ends: 63 [2024-11-08 14:24:58,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:24:58,303 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:24:58,304 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:24:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-08 14:24:58,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-08 14:24:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 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) [2024-11-08 14:24:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2024-11-08 14:24:58,321 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 47 [2024-11-08 14:24:58,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:24:58,322 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2024-11-08 14:24:58,322 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, (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) [2024-11-08 14:24:58,322 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2024-11-08 14:24:58,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-08 14:24:58,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:24:58,323 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] [2024-11-08 14:24:58,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 14:24:58,523 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 [2024-11-08 14:24:58,524 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:24:58,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:24:58,524 INFO L85 PathProgramCache]: Analyzing trace with hash 559010241, now seen corresponding path program 1 times [2024-11-08 14:24:58,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:24:58,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571620099] [2024-11-08 14:24:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:58,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:24:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:24:58,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969060857] [2024-11-08 14:24:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:58,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:24:58,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:24:58,544 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) [2024-11-08 14:24:58,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 14:24:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:58,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 14:24:58,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:24:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 14:24:58,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:24:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-08 14:24:58,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:24:58,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571620099] [2024-11-08 14:24:58,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:24:58,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969060857] [2024-11-08 14:24:58,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969060857] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 14:24:58,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:24:58,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-08 14:24:58,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003784057] [2024-11-08 14:24:58,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:24:58,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:24:58,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:24:58,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:24:58,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 14:24:58,803 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-11-08 14:24:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:24:58,853 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2024-11-08 14:24:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:24:58,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 55 [2024-11-08 14:24:58,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:24:58,854 INFO L225 Difference]: With dead ends: 68 [2024-11-08 14:24:58,854 INFO L226 Difference]: Without dead ends: 66 [2024-11-08 14:24:58,855 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:24:58,858 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:24:58,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 124 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:24:58,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-08 14:24:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2024-11-08 14:24:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 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) [2024-11-08 14:24:58,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-11-08 14:24:58,869 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 55 [2024-11-08 14:24:58,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:24:58,870 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-11-08 14:24:58,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-11-08 14:24:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-11-08 14:24:58,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 14:24:58,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:24:58,871 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, 1] [2024-11-08 14:24:58,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 14:24:59,075 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 [2024-11-08 14:24:59,076 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:24:59,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:24:59,076 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2024-11-08 14:24:59,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:24:59,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133148375] [2024-11-08 14:24:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:59,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:24:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:59,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:24:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:59,192 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:24:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:59,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:24:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:59,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:24:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:59,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 14:24:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:59,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-08 14:24:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:59,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-08 14:24:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:59,216 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-08 14:24:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 14:24:59,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:24:59,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133148375] [2024-11-08 14:24:59,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133148375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:24:59,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154568482] [2024-11-08 14:24:59,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:59,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:24:59,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:24:59,224 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) [2024-11-08 14:24:59,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 14:24:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:24:59,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 14:24:59,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:24:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 14:24:59,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:24:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 14:24:59,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154568482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:24:59,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:24:59,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-08 14:24:59,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156272224] [2024-11-08 14:24:59,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:24:59,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 14:24:59,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:24:59,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 14:24:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-08 14:24:59,452 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2024-11-08 14:24:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:24:59,643 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2024-11-08 14:24:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 14:24:59,644 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 56 [2024-11-08 14:24:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:24:59,646 INFO L225 Difference]: With dead ends: 211 [2024-11-08 14:24:59,646 INFO L226 Difference]: Without dead ends: 203 [2024-11-08 14:24:59,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:24:59,647 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 65 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:24:59,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 186 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:24:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-08 14:24:59,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2024-11-08 14:24:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 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) [2024-11-08 14:24:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2024-11-08 14:24:59,695 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2024-11-08 14:24:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:24:59,695 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2024-11-08 14:24:59,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2024-11-08 14:24:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2024-11-08 14:24:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-08 14:24:59,700 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:24:59,700 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, 1] [2024-11-08 14:24:59,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 14:24:59,901 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 [2024-11-08 14:24:59,901 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:24:59,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:24:59,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2024-11-08 14:24:59,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:24:59,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143793825] [2024-11-08 14:24:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:24:59,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:24:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:25:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:25:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 14:25:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-08 14:25:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-08 14:25:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-08 14:25:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-08 14:25:00,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:00,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143793825] [2024-11-08 14:25:00,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143793825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:00,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775963618] [2024-11-08 14:25:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:00,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:00,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:00,099 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) [2024-11-08 14:25:00,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 14:25:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 14:25:00,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-08 14:25:00,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-08 14:25:00,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775963618] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:00,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:25:00,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-08 14:25:00,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607768214] [2024-11-08 14:25:00,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:00,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 14:25:00,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:00,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 14:25:00,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-08 14:25:00,294 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2024-11-08 14:25:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:00,475 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2024-11-08 14:25:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 14:25:00,475 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 57 [2024-11-08 14:25:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:00,478 INFO L225 Difference]: With dead ends: 279 [2024-11-08 14:25:00,478 INFO L226 Difference]: Without dead ends: 259 [2024-11-08 14:25:00,478 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:25:00,479 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:00,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 249 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:25:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-08 14:25:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2024-11-08 14:25:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 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) [2024-11-08 14:25:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2024-11-08 14:25:00,519 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2024-11-08 14:25:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:00,519 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2024-11-08 14:25:00,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2024-11-08 14:25:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2024-11-08 14:25:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-08 14:25:00,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:00,520 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, 1] [2024-11-08 14:25:00,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 14:25:00,724 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 [2024-11-08 14:25:00,725 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:00,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:00,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2024-11-08 14:25:00,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:00,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534900590] [2024-11-08 14:25:00,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:00,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,808 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:25:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,810 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:25:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 14:25:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,815 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-08 14:25:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,819 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-08 14:25:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-08 14:25:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 14:25:00,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:00,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534900590] [2024-11-08 14:25:00,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534900590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:00,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224810811] [2024-11-08 14:25:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:00,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:00,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:00,828 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) [2024-11-08 14:25:00,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 14:25:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:00,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 14:25:00,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 14:25:00,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 14:25:01,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224810811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:01,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:25:01,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-08 14:25:01,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387912141] [2024-11-08 14:25:01,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:01,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 14:25:01,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:01,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 14:25:01,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-08 14:25:01,033 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2024-11-08 14:25:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:01,209 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2024-11-08 14:25:01,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 14:25:01,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 59 [2024-11-08 14:25:01,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:01,214 INFO L225 Difference]: With dead ends: 344 [2024-11-08 14:25:01,214 INFO L226 Difference]: Without dead ends: 248 [2024-11-08 14:25:01,215 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:25:01,216 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 70 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:01,218 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 183 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:25:01,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-08 14:25:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2024-11-08 14:25:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 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) [2024-11-08 14:25:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2024-11-08 14:25:01,251 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2024-11-08 14:25:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:01,251 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2024-11-08 14:25:01,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2024-11-08 14:25:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2024-11-08 14:25:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-08 14:25:01,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:01,253 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, 1] [2024-11-08 14:25:01,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 14:25:01,453 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 [2024-11-08 14:25:01,454 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:01,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:01,455 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2024-11-08 14:25:01,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:01,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739848416] [2024-11-08 14:25:01,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:01,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:01,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132394916] [2024-11-08 14:25:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:01,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:01,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:01,478 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) [2024-11-08 14:25:01,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 14:25:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:01,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 14:25:01,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-08 14:25:01,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:01,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:01,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739848416] [2024-11-08 14:25:01,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:01,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132394916] [2024-11-08 14:25:01,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132394916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:01,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:25:01,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-11-08 14:25:01,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023514791] [2024-11-08 14:25:01,767 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:01,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 14:25:01,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:01,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 14:25:01,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-08 14:25:01,768 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-08 14:25:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:01,883 INFO L93 Difference]: Finished difference Result 283 states and 355 transitions. [2024-11-08 14:25:01,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 14:25:01,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2024-11-08 14:25:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:01,886 INFO L225 Difference]: With dead ends: 283 [2024-11-08 14:25:01,886 INFO L226 Difference]: Without dead ends: 278 [2024-11-08 14:25:01,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:25:01,887 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 10 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:01,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 213 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:25:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-11-08 14:25:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2024-11-08 14:25:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 183 states have (on average 1.185792349726776) internal successors, (217), 187 states have internal predecessors, (217), 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) [2024-11-08 14:25:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 343 transitions. [2024-11-08 14:25:01,916 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 343 transitions. Word has length 64 [2024-11-08 14:25:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:01,916 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 343 transitions. [2024-11-08 14:25:01,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-08 14:25:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 343 transitions. [2024-11-08 14:25:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-08 14:25:01,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:01,918 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, 1] [2024-11-08 14:25:01,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 14:25:02,121 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 [2024-11-08 14:25:02,122 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:02,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:02,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2024-11-08 14:25:02,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:02,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400764420] [2024-11-08 14:25:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:02,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:02,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44790285] [2024-11-08 14:25:02,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:25:02,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:02,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:02,142 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) [2024-11-08 14:25:02,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 14:25:02,211 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:25:02,211 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:25:02,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-08 14:25:02,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-08 14:25:02,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-08 14:25:02,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:02,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400764420] [2024-11-08 14:25:02,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:02,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44790285] [2024-11-08 14:25:02,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44790285] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:02,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:25:02,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2024-11-08 14:25:02,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173454432] [2024-11-08 14:25:02,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:02,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 14:25:02,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 14:25:02,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:25:02,772 INFO L87 Difference]: Start difference. First operand 276 states and 343 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-08 14:25:03,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:03,256 INFO L93 Difference]: Finished difference Result 294 states and 361 transitions. [2024-11-08 14:25:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 14:25:03,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 69 [2024-11-08 14:25:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:03,259 INFO L225 Difference]: With dead ends: 294 [2024-11-08 14:25:03,259 INFO L226 Difference]: Without dead ends: 290 [2024-11-08 14:25:03,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2024-11-08 14:25:03,261 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 60 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:03,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 330 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:25:03,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-11-08 14:25:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 286. [2024-11-08 14:25:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 192 states have (on average 1.1770833333333333) internal successors, (226), 195 states have internal predecessors, (226), 63 states have call successors, (63), 30 states have call predecessors, (63), 30 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-08 14:25:03,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 349 transitions. [2024-11-08 14:25:03,319 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 349 transitions. Word has length 69 [2024-11-08 14:25:03,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:03,319 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 349 transitions. [2024-11-08 14:25:03,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-08 14:25:03,320 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 349 transitions. [2024-11-08 14:25:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-08 14:25:03,320 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:03,320 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, 1] [2024-11-08 14:25:03,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:03,521 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 [2024-11-08 14:25:03,521 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:03,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:03,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2024-11-08 14:25:03,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:03,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130303051] [2024-11-08 14:25:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:03,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:03,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109944190] [2024-11-08 14:25:03,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:25:03,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:03,540 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) [2024-11-08 14:25:03,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 14:25:03,607 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 14:25:03,607 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:25:03,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-08 14:25:03,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-08 14:25:04,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:22,881 WARN L286 SmtUtils]: Spent 6.45s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 14:25:42,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:42,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130303051] [2024-11-08 14:25:42,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:42,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109944190] [2024-11-08 14:25:42,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109944190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:42,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:25:42,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-08 14:25:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622246059] [2024-11-08 14:25:42,445 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:42,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 14:25:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 14:25:42,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2024-11-08 14:25:42,446 INFO L87 Difference]: Start difference. First operand 286 states and 349 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 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) [2024-11-08 14:25:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:43,077 INFO L93 Difference]: Finished difference Result 309 states and 369 transitions. [2024-11-08 14:25:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 14:25:43,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 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 74 [2024-11-08 14:25:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:43,079 INFO L225 Difference]: With dead ends: 309 [2024-11-08 14:25:43,080 INFO L226 Difference]: Without dead ends: 305 [2024-11-08 14:25:43,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2024-11-08 14:25:43,081 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:43,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 294 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 14:25:43,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-08 14:25:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2024-11-08 14:25:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 206 states have (on average 1.1601941747572815) internal successors, (239), 208 states have internal predecessors, (239), 63 states have call successors, (63), 35 states have call predecessors, (63), 34 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-08 14:25:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 362 transitions. [2024-11-08 14:25:43,129 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 362 transitions. Word has length 74 [2024-11-08 14:25:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:43,129 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 362 transitions. [2024-11-08 14:25:43,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 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) [2024-11-08 14:25:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 362 transitions. [2024-11-08 14:25:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-08 14:25:43,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:43,131 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, 1] [2024-11-08 14:25:43,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:43,331 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 [2024-11-08 14:25:43,331 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:43,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:43,332 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2024-11-08 14:25:43,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:43,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243706081] [2024-11-08 14:25:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:43,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:43,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285583823] [2024-11-08 14:25:43,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:43,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:43,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:43,361 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) [2024-11-08 14:25:43,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 14:25:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:43,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-08 14:25:43,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-11-08 14:25:43,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-08 14:25:44,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:44,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243706081] [2024-11-08 14:25:44,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:44,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285583823] [2024-11-08 14:25:44,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285583823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:44,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:25:44,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-11-08 14:25:44,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438790889] [2024-11-08 14:25:44,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:44,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 14:25:44,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:44,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 14:25:44,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-08 14:25:44,733 INFO L87 Difference]: Start difference. First operand 304 states and 362 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 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) [2024-11-08 14:25:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:47,467 INFO L93 Difference]: Finished difference Result 440 states and 579 transitions. [2024-11-08 14:25:47,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-08 14:25:47,468 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 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 80 [2024-11-08 14:25:47,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:47,471 INFO L225 Difference]: With dead ends: 440 [2024-11-08 14:25:47,471 INFO L226 Difference]: Without dead ends: 425 [2024-11-08 14:25:47,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 14:25:47,472 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 136 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:47,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 634 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-08 14:25:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2024-11-08 14:25:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 392. [2024-11-08 14:25:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 259 states have (on average 1.22007722007722) internal successors, (316), 260 states have internal predecessors, (316), 97 states have call successors, (97), 35 states have call predecessors, (97), 35 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2024-11-08 14:25:47,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 509 transitions. [2024-11-08 14:25:47,574 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 509 transitions. Word has length 80 [2024-11-08 14:25:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:47,574 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 509 transitions. [2024-11-08 14:25:47,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 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) [2024-11-08 14:25:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 509 transitions. [2024-11-08 14:25:47,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-08 14:25:47,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:47,575 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, 1] [2024-11-08 14:25:47,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 14:25:47,776 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 [2024-11-08 14:25:47,776 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:47,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:47,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1718599493, now seen corresponding path program 1 times [2024-11-08 14:25:47,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:47,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664958345] [2024-11-08 14:25:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:47,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:47,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007755263] [2024-11-08 14:25:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:47,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:47,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:47,798 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) [2024-11-08 14:25:47,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 14:25:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:47,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-08 14:25:47,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2024-11-08 14:25:48,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:48,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:48,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664958345] [2024-11-08 14:25:48,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:48,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007755263] [2024-11-08 14:25:48,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007755263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:48,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:25:48,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-08 14:25:48,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577362334] [2024-11-08 14:25:48,931 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:48,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 14:25:48,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 14:25:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-08 14:25:48,932 INFO L87 Difference]: Start difference. First operand 392 states and 509 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 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) [2024-11-08 14:25:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:49,686 INFO L93 Difference]: Finished difference Result 401 states and 517 transitions. [2024-11-08 14:25:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 14:25:49,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 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 97 [2024-11-08 14:25:49,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:49,690 INFO L225 Difference]: With dead ends: 401 [2024-11-08 14:25:49,690 INFO L226 Difference]: Without dead ends: 399 [2024-11-08 14:25:49,691 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-08 14:25:49,692 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 42 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:49,692 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 323 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 14:25:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-11-08 14:25:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 396. [2024-11-08 14:25:49,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 262 states have (on average 1.213740458015267) internal successors, (318), 263 states have internal predecessors, (318), 97 states have call successors, (97), 36 states have call predecessors, (97), 36 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2024-11-08 14:25:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 511 transitions. [2024-11-08 14:25:49,794 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 511 transitions. Word has length 97 [2024-11-08 14:25:49,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:49,794 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 511 transitions. [2024-11-08 14:25:49,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 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) [2024-11-08 14:25:49,795 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 511 transitions. [2024-11-08 14:25:49,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-08 14:25:49,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:49,796 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 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] [2024-11-08 14:25:49,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 14:25:49,997 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,SelfDestructingSolverStorable15 [2024-11-08 14:25:49,997 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:49,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:49,998 INFO L85 PathProgramCache]: Analyzing trace with hash 160443165, now seen corresponding path program 4 times [2024-11-08 14:25:49,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:49,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638569167] [2024-11-08 14:25:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:49,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,083 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:25:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,089 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:25:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 14:25:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-08 14:25:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,096 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-08 14:25:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,097 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-08 14:25:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,099 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-11-08 14:25:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,102 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-08 14:25:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-08 14:25:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,107 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-08 14:25:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-11-08 14:25:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-08 14:25:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,114 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-11-08 14:25:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-11-08 14:25:50,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:50,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638569167] [2024-11-08 14:25:50,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638569167] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:25:50,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:25:50,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:25:50,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723358086] [2024-11-08 14:25:50,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:50,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:25:50,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:50,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:25:50,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:25:50,118 INFO L87 Difference]: Start difference. First operand 396 states and 511 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-08 14:25:50,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:50,263 INFO L93 Difference]: Finished difference Result 588 states and 820 transitions. [2024-11-08 14:25:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 14:25:50,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 101 [2024-11-08 14:25:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:50,266 INFO L225 Difference]: With dead ends: 588 [2024-11-08 14:25:50,266 INFO L226 Difference]: Without dead ends: 465 [2024-11-08 14:25:50,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-08 14:25:50,268 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 12 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:50,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 174 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:25:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2024-11-08 14:25:50,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 415. [2024-11-08 14:25:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 273 states have (on average 1.2234432234432235) internal successors, (334), 274 states have internal predecessors, (334), 105 states have call successors, (105), 36 states have call predecessors, (105), 36 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2024-11-08 14:25:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 543 transitions. [2024-11-08 14:25:50,375 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 543 transitions. Word has length 101 [2024-11-08 14:25:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:50,375 INFO L471 AbstractCegarLoop]: Abstraction has 415 states and 543 transitions. [2024-11-08 14:25:50,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-08 14:25:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 543 transitions. [2024-11-08 14:25:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-08 14:25:50,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:50,376 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, 1] [2024-11-08 14:25:50,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-08 14:25:50,376 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:50,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:50,377 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2024-11-08 14:25:50,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:50,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603013335] [2024-11-08 14:25:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:50,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,570 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,574 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:25:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:25:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,582 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 14:25:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-08 14:25:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,589 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-08 14:25:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,592 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-08 14:25:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-11-08 14:25:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-08 14:25:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,600 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-08 14:25:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-08 14:25:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-08 14:25:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-08 14:25:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-11-08 14:25:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-11-08 14:25:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-08 14:25:50,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:50,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603013335] [2024-11-08 14:25:50,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603013335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:50,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812016053] [2024-11-08 14:25:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:50,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:50,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:50,627 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) [2024-11-08 14:25:50,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 14:25:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:50,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 14:25:50,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-08 14:25:50,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-08 14:25:50,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812016053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:50,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:25:50,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2024-11-08 14:25:50,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71699998] [2024-11-08 14:25:50,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:50,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 14:25:50,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:50,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 14:25:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2024-11-08 14:25:50,968 INFO L87 Difference]: Start difference. First operand 415 states and 543 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) [2024-11-08 14:25:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:51,599 INFO L93 Difference]: Finished difference Result 1524 states and 2068 transitions. [2024-11-08 14:25:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-08 14:25:51,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) Word has length 112 [2024-11-08 14:25:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:51,608 INFO L225 Difference]: With dead ends: 1524 [2024-11-08 14:25:51,608 INFO L226 Difference]: Without dead ends: 1367 [2024-11-08 14:25:51,609 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2024-11-08 14:25:51,610 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 222 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:51,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 249 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:25:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2024-11-08 14:25:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1305. [2024-11-08 14:25:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 820 states have (on average 1.1841463414634146) internal successors, (971), 828 states have internal predecessors, (971), 360 states have call successors, (360), 124 states have call predecessors, (360), 124 states have return successors, (352), 352 states have call predecessors, (352), 352 states have call successors, (352) [2024-11-08 14:25:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1683 transitions. [2024-11-08 14:25:51,997 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1683 transitions. Word has length 112 [2024-11-08 14:25:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:51,997 INFO L471 AbstractCegarLoop]: Abstraction has 1305 states and 1683 transitions. [2024-11-08 14:25:51,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) [2024-11-08 14:25:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1683 transitions. [2024-11-08 14:25:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-08 14:25:51,999 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:52,000 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, 1] [2024-11-08 14:25:52,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:52,204 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 [2024-11-08 14:25:52,205 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:52,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:52,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1062250723, now seen corresponding path program 2 times [2024-11-08 14:25:52,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:52,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97924615] [2024-11-08 14:25:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:52,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:52,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058219812] [2024-11-08 14:25:52,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:25:52,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:52,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:52,240 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) [2024-11-08 14:25:52,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 14:25:52,327 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:25:52,327 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:25:52,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-08 14:25:52,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 103 proven. 56 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-08 14:25:53,353 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:03,610 WARN L286 SmtUtils]: Spent 8.34s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 14:26:03,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:03,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97924615] [2024-11-08 14:26:03,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:26:03,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058219812] [2024-11-08 14:26:03,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058219812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:03,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:26:03,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-08 14:26:03,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896598379] [2024-11-08 14:26:03,611 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:03,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 14:26:03,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 14:26:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-11-08 14:26:03,613 INFO L87 Difference]: Start difference. First operand 1305 states and 1683 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-08 14:26:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:04,583 INFO L93 Difference]: Finished difference Result 1426 states and 1825 transitions. [2024-11-08 14:26:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 14:26:04,584 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 120 [2024-11-08 14:26:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:04,593 INFO L225 Difference]: With dead ends: 1426 [2024-11-08 14:26:04,594 INFO L226 Difference]: Without dead ends: 1424 [2024-11-08 14:26:04,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2024-11-08 14:26:04,595 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 45 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:04,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 486 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 14:26:04,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2024-11-08 14:26:04,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1310. [2024-11-08 14:26:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 826 states have (on average 1.1803874092009685) internal successors, (975), 834 states have internal predecessors, (975), 356 states have call successors, (356), 127 states have call predecessors, (356), 127 states have return successors, (348), 348 states have call predecessors, (348), 348 states have call successors, (348) [2024-11-08 14:26:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1679 transitions. [2024-11-08 14:26:04,951 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1679 transitions. Word has length 120 [2024-11-08 14:26:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:04,952 INFO L471 AbstractCegarLoop]: Abstraction has 1310 states and 1679 transitions. [2024-11-08 14:26:04,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-08 14:26:04,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1679 transitions. [2024-11-08 14:26:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-08 14:26:04,953 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:04,954 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, 1] [2024-11-08 14:26:04,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 14:26:05,157 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 [2024-11-08 14:26:05,158 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:05,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:05,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1493115269, now seen corresponding path program 3 times [2024-11-08 14:26:05,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:05,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166531403] [2024-11-08 14:26:05,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:05,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:26:05,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660306240] [2024-11-08 14:26:05,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:26:05,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:05,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:05,193 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) [2024-11-08 14:26:05,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 14:26:05,309 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 14:26:05,310 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:26:05,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-08 14:26:05,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 100 proven. 57 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-08 14:26:06,478 INFO L311 TraceCheckSpWp]: Computing backward predicates...