./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound100.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 efc4103a673d30f5c3fd98741c7d56d84f1ec5a0e9e3b77a4d9f9d9493ec5192 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 02:26:47,924 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 02:26:48,005 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 02:26:48,011 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 02:26:48,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 02:26:48,035 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 02:26:48,036 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 02:26:48,036 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 02:26:48,037 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 02:26:48,038 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 02:26:48,039 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 02:26:48,039 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 02:26:48,040 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 02:26:48,040 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 02:26:48,040 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 02:26:48,040 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 02:26:48,041 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 02:26:48,041 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 02:26:48,041 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 02:26:48,043 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 02:26:48,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 02:26:48,044 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 02:26:48,044 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 02:26:48,044 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 02:26:48,044 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 02:26:48,044 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 02:26:48,045 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 02:26:48,045 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 02:26:48,045 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 02:26:48,045 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 02:26:48,045 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 02:26:48,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 02:26:48,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:26:48,046 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 02:26:48,046 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 02:26:48,046 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 02:26:48,046 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 02:26:48,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 02:26:48,046 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 02:26:48,047 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 02:26:48,047 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 02:26:48,050 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 02:26:48,050 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efc4103a673d30f5c3fd98741c7d56d84f1ec5a0e9e3b77a4d9f9d9493ec5192 [2024-10-14 02:26:48,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 02:26:48,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 02:26:48,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 02:26:48,265 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 02:26:48,265 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 02:26:48,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound100.c [2024-10-14 02:26:49,534 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 02:26:49,704 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 02:26:49,706 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound100.c [2024-10-14 02:26:49,717 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f715d2e/d459c1ecd8ea4bb48b790d2d9e5af5b0/FLAG618c4773e [2024-10-14 02:26:50,105 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f715d2e/d459c1ecd8ea4bb48b790d2d9e5af5b0 [2024-10-14 02:26:50,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 02:26:50,108 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 02:26:50,112 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 02:26:50,112 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 02:26:50,116 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 02:26:50,116 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,117 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635b60bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50, skipping insertion in model container [2024-10-14 02:26:50,119 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,136 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 02:26:50,253 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound100.c[538,551] [2024-10-14 02:26:50,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:26:50,285 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 02:26:50,295 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound100.c[538,551] [2024-10-14 02:26:50,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:26:50,319 INFO L204 MainTranslator]: Completed translation [2024-10-14 02:26:50,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50 WrapperNode [2024-10-14 02:26:50,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 02:26:50,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 02:26:50,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 02:26:50,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 02:26:50,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,339 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,389 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-10-14 02:26:50,395 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 02:26:50,396 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 02:26:50,396 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 02:26:50,396 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 02:26:50,411 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,416 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,451 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-14 02:26:50,454 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,454 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,456 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,462 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,464 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 02:26:50,469 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 02:26:50,469 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 02:26:50,469 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 02:26:50,469 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (1/1) ... [2024-10-14 02:26:50,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:26:50,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:26:50,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 02:26:50,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 02:26:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 02:26:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 02:26:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 02:26:50,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 02:26:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-14 02:26:50,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-14 02:26:50,593 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 02:26:50,595 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 02:26:50,749 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-10-14 02:26:50,749 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 02:26:50,764 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 02:26:50,764 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 02:26:50,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:26:50 BoogieIcfgContainer [2024-10-14 02:26:50,764 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 02:26:50,766 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 02:26:50,766 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 02:26:50,768 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 02:26:50,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:26:50" (1/3) ... [2024-10-14 02:26:50,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c1008b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:26:50, skipping insertion in model container [2024-10-14 02:26:50,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:26:50" (2/3) ... [2024-10-14 02:26:50,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c1008b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:26:50, skipping insertion in model container [2024-10-14 02:26:50,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:26:50" (3/3) ... [2024-10-14 02:26:50,771 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound100.c [2024-10-14 02:26:50,783 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 02:26:50,784 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 02:26:50,845 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 02:26:50,853 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;@1e69d1b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 02:26:50,853 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 02:26:50,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-14 02:26:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 02:26:50,862 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:50,862 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:50,863 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:50,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:50,867 INFO L85 PathProgramCache]: Analyzing trace with hash 65649153, now seen corresponding path program 1 times [2024-10-14 02:26:50,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:50,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444539039] [2024-10-14 02:26:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:50,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 02:26:50,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:26:50,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444539039] [2024-10-14 02:26:50,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444539039] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:26:50,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:26:50,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 02:26:50,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214194254] [2024-10-14 02:26:50,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:26:51,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 02:26:51,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:26:51,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 02:26:51,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 02:26:51,023 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 02:26:51,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:26:51,056 INFO L93 Difference]: Finished difference Result 48 states and 82 transitions. [2024-10-14 02:26:51,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 02:26:51,059 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-14 02:26:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:26:51,065 INFO L225 Difference]: With dead ends: 48 [2024-10-14 02:26:51,065 INFO L226 Difference]: Without dead ends: 23 [2024-10-14 02:26:51,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 02:26:51,069 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:26:51,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:26:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-14 02:26:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-14 02:26:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 02:26:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2024-10-14 02:26:51,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 9 [2024-10-14 02:26:51,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:26:51,100 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2024-10-14 02:26:51,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 02:26:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2024-10-14 02:26:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 02:26:51,101 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:51,102 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:51,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 02:26:51,102 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:51,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1205755883, now seen corresponding path program 1 times [2024-10-14 02:26:51,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:51,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620020766] [2024-10-14 02:26:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:51,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 02:26:51,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:26:51,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620020766] [2024-10-14 02:26:51,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620020766] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:26:51,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:26:51,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:26:51,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421805174] [2024-10-14 02:26:51,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:26:51,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:26:51,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:26:51,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:26:51,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:26:51,276 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 02:26:51,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:26:51,331 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2024-10-14 02:26:51,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:26:51,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-14 02:26:51,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:26:51,332 INFO L225 Difference]: With dead ends: 37 [2024-10-14 02:26:51,333 INFO L226 Difference]: Without dead ends: 35 [2024-10-14 02:26:51,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:26:51,334 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:26:51,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:26:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-14 02:26:51,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2024-10-14 02:26:51,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 02:26:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-10-14 02:26:51,347 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2024-10-14 02:26:51,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:26:51,347 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-10-14 02:26:51,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 02:26:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-10-14 02:26:51,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 02:26:51,348 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:51,348 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:51,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 02:26:51,349 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:51,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:51,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2004332404, now seen corresponding path program 1 times [2024-10-14 02:26:51,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:51,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976788469] [2024-10-14 02:26:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:51,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 02:26:51,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:26:51,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976788469] [2024-10-14 02:26:51,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976788469] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:26:51,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:26:51,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 02:26:51,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879870702] [2024-10-14 02:26:51,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:26:51,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 02:26:51,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:26:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 02:26:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 02:26:51,413 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 02:26:51,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:26:51,430 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2024-10-14 02:26:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 02:26:51,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-14 02:26:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:26:51,432 INFO L225 Difference]: With dead ends: 43 [2024-10-14 02:26:51,432 INFO L226 Difference]: Without dead ends: 29 [2024-10-14 02:26:51,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 02:26:51,433 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:26:51,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:26:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-14 02:26:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-14 02:26:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 02:26:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2024-10-14 02:26:51,440 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2024-10-14 02:26:51,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:26:51,440 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2024-10-14 02:26:51,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 02:26:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2024-10-14 02:26:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 02:26:51,441 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:51,441 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:51,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 02:26:51,441 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:51,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:51,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1962237034, now seen corresponding path program 1 times [2024-10-14 02:26:51,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:51,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905108671] [2024-10-14 02:26:51,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:51,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:51,534 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:26:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 02:26:51,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:26:51,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905108671] [2024-10-14 02:26:51,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905108671] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:26:51,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:26:51,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:26:51,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880089989] [2024-10-14 02:26:51,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:26:51,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:26:51,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:26:51,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:26:51,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:26:51,544 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 02:26:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:26:51,599 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2024-10-14 02:26:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:26:51,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-10-14 02:26:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:26:51,602 INFO L225 Difference]: With dead ends: 43 [2024-10-14 02:26:51,602 INFO L226 Difference]: Without dead ends: 41 [2024-10-14 02:26:51,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:26:51,603 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:26:51,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:26:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-14 02:26:51,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2024-10-14 02:26:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 02:26:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-10-14 02:26:51,612 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 14 [2024-10-14 02:26:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:26:51,612 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-10-14 02:26:51,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 02:26:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-10-14 02:26:51,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-14 02:26:51,613 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:51,613 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:51,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 02:26:51,613 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:51,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:51,614 INFO L85 PathProgramCache]: Analyzing trace with hash 608183541, now seen corresponding path program 1 times [2024-10-14 02:26:51,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:51,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629836651] [2024-10-14 02:26:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:51,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:26:51,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410970111] [2024-10-14 02:26:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:51,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:26:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:26:51,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:26:51,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 02:26:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:51,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:26:51,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:26:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:26:51,797 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:26:51,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:26:51,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629836651] [2024-10-14 02:26:51,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:26:51,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410970111] [2024-10-14 02:26:51,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410970111] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:26:51,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:26:51,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:26:51,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591085308] [2024-10-14 02:26:51,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:26:51,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:26:51,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:26:51,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:26:51,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:26:51,800 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 02:26:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:26:51,888 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2024-10-14 02:26:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:26:51,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-10-14 02:26:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:26:51,889 INFO L225 Difference]: With dead ends: 62 [2024-10-14 02:26:51,890 INFO L226 Difference]: Without dead ends: 47 [2024-10-14 02:26:51,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:26:51,891 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:26:51,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 98 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:26:51,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-14 02:26:51,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-10-14 02:26:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-14 02:26:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2024-10-14 02:26:51,900 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 19 [2024-10-14 02:26:51,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:26:51,900 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2024-10-14 02:26:51,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 02:26:51,901 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2024-10-14 02:26:51,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 02:26:51,901 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:51,902 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:51,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 02:26:52,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:26:52,103 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:52,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash 560729168, now seen corresponding path program 1 times [2024-10-14 02:26:52,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:52,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279131307] [2024-10-14 02:26:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:52,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:52,183 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:26:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:52,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:26:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:52,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:26:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 02:26:52,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:26:52,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279131307] [2024-10-14 02:26:52,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279131307] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:26:52,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:26:52,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 02:26:52,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105887875] [2024-10-14 02:26:52,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:26:52,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 02:26:52,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:26:52,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 02:26:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:26:52,214 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 02:26:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:26:52,277 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-10-14 02:26:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 02:26:52,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2024-10-14 02:26:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:26:52,279 INFO L225 Difference]: With dead ends: 66 [2024-10-14 02:26:52,280 INFO L226 Difference]: Without dead ends: 59 [2024-10-14 02:26:52,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:26:52,281 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:26:52,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 94 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:26:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-14 02:26:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-10-14 02:26:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-14 02:26:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-10-14 02:26:52,302 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 27 [2024-10-14 02:26:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:26:52,302 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-10-14 02:26:52,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 02:26:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-10-14 02:26:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 02:26:52,303 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:52,303 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:52,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 02:26:52,303 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:52,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:52,303 INFO L85 PathProgramCache]: Analyzing trace with hash 562457046, now seen corresponding path program 1 times [2024-10-14 02:26:52,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:52,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775209234] [2024-10-14 02:26:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:52,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:26:52,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069439378] [2024-10-14 02:26:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:52,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:26:52,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:26:52,328 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:26:52,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 02:26:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:52,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:26:52,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:26:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 02:26:52,466 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:26:52,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:26:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775209234] [2024-10-14 02:26:52,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:26:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069439378] [2024-10-14 02:26:52,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069439378] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:26:52,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:26:52,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:26:52,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33057324] [2024-10-14 02:26:52,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:26:52,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:26:52,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:26:52,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:26:52,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:26:52,468 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 02:26:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:26:52,525 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2024-10-14 02:26:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:26:52,526 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), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2024-10-14 02:26:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:26:52,527 INFO L225 Difference]: With dead ends: 72 [2024-10-14 02:26:52,527 INFO L226 Difference]: Without dead ends: 70 [2024-10-14 02:26:52,527 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:26:52,528 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:26:52,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 78 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:26:52,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-14 02:26:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-10-14 02:26:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 47 states have internal predecessors, (55), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-14 02:26:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2024-10-14 02:26:52,538 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 27 [2024-10-14 02:26:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:26:52,539 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2024-10-14 02:26:52,539 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), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 02:26:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2024-10-14 02:26:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-14 02:26:52,540 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:52,540 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:52,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-14 02:26:52,740 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,SelfDestructingSolverStorable6 [2024-10-14 02:26:52,741 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:52,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:52,742 INFO L85 PathProgramCache]: Analyzing trace with hash 976926058, now seen corresponding path program 1 times [2024-10-14 02:26:52,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:52,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546076181] [2024-10-14 02:26:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:52,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:52,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:26:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:52,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:26:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:52,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:26:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:52,815 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-14 02:26:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-14 02:26:52,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:26:52,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546076181] [2024-10-14 02:26:52,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546076181] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:26:52,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523723400] [2024-10-14 02:26:52,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:52,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:26:52,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:26:52,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:26:52,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 02:26:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:52,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 02:26:52,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:26:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-14 02:26:52,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:26:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-14 02:26:52,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523723400] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:26:52,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:26:52,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-10-14 02:26:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50995256] [2024-10-14 02:26:52,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:26:52,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 02:26:52,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:26:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 02:26:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-14 02:26:52,972 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-14 02:26:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:26:53,067 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2024-10-14 02:26:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 02:26:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 34 [2024-10-14 02:26:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:26:53,069 INFO L225 Difference]: With dead ends: 156 [2024-10-14 02:26:53,069 INFO L226 Difference]: Without dead ends: 131 [2024-10-14 02:26:53,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-14 02:26:53,070 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:26:53,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 154 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:26:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-14 02:26:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2024-10-14 02:26:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 80 states have (on average 1.2) internal successors, (96), 84 states have internal predecessors, (96), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-14 02:26:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2024-10-14 02:26:53,084 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 34 [2024-10-14 02:26:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:26:53,085 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2024-10-14 02:26:53,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-14 02:26:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2024-10-14 02:26:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-14 02:26:53,086 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:53,086 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:53,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 02:26:53,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:26:53,289 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:53,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1560293058, now seen corresponding path program 1 times [2024-10-14 02:26:53,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:53,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050545811] [2024-10-14 02:26:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:53,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:26:53,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825832536] [2024-10-14 02:26:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:53,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:26:53,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:26:53,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:26:53,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 02:26:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:53,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 02:26:53,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:26:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-14 02:26:53,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:26:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-14 02:26:53,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:26:53,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050545811] [2024-10-14 02:26:53,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:26:53,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825832536] [2024-10-14 02:26:53,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825832536] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 02:26:53,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 02:26:53,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-14 02:26:53,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768994928] [2024-10-14 02:26:53,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:26:53,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:26:53,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:26:53,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:26:53,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 02:26:53,476 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 02:26:54,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:26:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:26:54,652 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2024-10-14 02:26:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:26:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2024-10-14 02:26:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:26:54,654 INFO L225 Difference]: With dead ends: 147 [2024-10-14 02:26:54,654 INFO L226 Difference]: Without dead ends: 141 [2024-10-14 02:26:54,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-14 02:26:54,655 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:26:54,655 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-14 02:26:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-14 02:26:54,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2024-10-14 02:26:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 91 states have internal predecessors, (102), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-10-14 02:26:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2024-10-14 02:26:54,676 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 37 [2024-10-14 02:26:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:26:54,676 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2024-10-14 02:26:54,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 02:26:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2024-10-14 02:26:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-14 02:26:54,678 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:54,678 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:54,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 02:26:54,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:26:54,879 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:54,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:54,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1166816529, now seen corresponding path program 1 times [2024-10-14 02:26:54,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:54,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279507303] [2024-10-14 02:26:54,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:54,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:54,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:26:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:54,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:26:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:54,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:26:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:54,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:26:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:54,972 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:26:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:54,975 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-14 02:26:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-14 02:26:54,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:26:54,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279507303] [2024-10-14 02:26:54,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279507303] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:26:54,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:26:54,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:26:54,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243014879] [2024-10-14 02:26:54,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:26:54,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:26:54,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:26:54,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:26:54,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:26:54,984 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-14 02:26:55,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:26:55,036 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2024-10-14 02:26:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:26:55,036 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), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2024-10-14 02:26:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:26:55,038 INFO L225 Difference]: With dead ends: 138 [2024-10-14 02:26:55,040 INFO L226 Difference]: Without dead ends: 119 [2024-10-14 02:26:55,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:26:55,041 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:26:55,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:26:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-10-14 02:26:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-10-14 02:26:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-10-14 02:26:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2024-10-14 02:26:55,064 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 43 [2024-10-14 02:26:55,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:26:55,065 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2024-10-14 02:26:55,065 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), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-14 02:26:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2024-10-14 02:26:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-14 02:26:55,066 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:55,068 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:55,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 02:26:55,069 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:55,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash 367273510, now seen corresponding path program 1 times [2024-10-14 02:26:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:55,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108612351] [2024-10-14 02:26:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:55,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:26:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:55,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:26:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:55,168 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:26:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:55,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:26:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:55,172 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:26:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:55,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:26:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:55,178 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:26:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-14 02:26:55,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:26:55,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108612351] [2024-10-14 02:26:55,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108612351] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:26:55,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914579650] [2024-10-14 02:26:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:55,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:26:55,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:26:55,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:26:55,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 02:26:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:55,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:26:55,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:26:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-14 02:26:55,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:26:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-14 02:26:55,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914579650] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:26:55,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:26:55,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-10-14 02:26:55,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587761488] [2024-10-14 02:26:55,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:26:55,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 02:26:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:26:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 02:26:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-14 02:26:55,362 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-10-14 02:26:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:26:55,502 INFO L93 Difference]: Finished difference Result 242 states and 295 transitions. [2024-10-14 02:26:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 02:26:55,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 50 [2024-10-14 02:26:55,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:26:55,504 INFO L225 Difference]: With dead ends: 242 [2024-10-14 02:26:55,505 INFO L226 Difference]: Without dead ends: 221 [2024-10-14 02:26:55,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-10-14 02:26:55,506 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:26:55,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 162 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:26:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-10-14 02:26:55,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2024-10-14 02:26:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 148 states have internal predecessors, (166), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-10-14 02:26:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 260 transitions. [2024-10-14 02:26:55,541 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 260 transitions. Word has length 50 [2024-10-14 02:26:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:26:55,541 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 260 transitions. [2024-10-14 02:26:55,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-10-14 02:26:55,541 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 260 transitions. [2024-10-14 02:26:55,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-14 02:26:55,544 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:55,544 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:55,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 02:26:55,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-14 02:26:55,745 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:55,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash -293585845, now seen corresponding path program 1 times [2024-10-14 02:26:55,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:55,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572921310] [2024-10-14 02:26:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:55,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:26:55,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540836416] [2024-10-14 02:26:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:55,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:26:55,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:26:55,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:26:55,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 02:26:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:55,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 02:26:55,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:26:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-14 02:26:56,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:26:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-14 02:26:57,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:26:57,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572921310] [2024-10-14 02:26:57,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:26:57,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540836416] [2024-10-14 02:26:57,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540836416] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:26:57,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:26:57,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-10-14 02:26:57,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674642215] [2024-10-14 02:26:57,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:26:57,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 02:26:57,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:26:57,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 02:26:57,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-10-14 02:26:57,758 INFO L87 Difference]: Start difference. First operand 214 states and 260 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2024-10-14 02:26:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:26:58,692 INFO L93 Difference]: Finished difference Result 373 states and 476 transitions. [2024-10-14 02:26:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 02:26:58,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 59 [2024-10-14 02:26:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:26:58,695 INFO L225 Difference]: With dead ends: 373 [2024-10-14 02:26:58,695 INFO L226 Difference]: Without dead ends: 297 [2024-10-14 02:26:58,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2024-10-14 02:26:58,696 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 02:26:58,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 369 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 02:26:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-10-14 02:26:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 258. [2024-10-14 02:26:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 173 states have (on average 1.1849710982658959) internal successors, (205), 184 states have internal predecessors, (205), 53 states have call successors, (53), 31 states have call predecessors, (53), 31 states have return successors, (50), 42 states have call predecessors, (50), 50 states have call successors, (50) [2024-10-14 02:26:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 308 transitions. [2024-10-14 02:26:58,742 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 308 transitions. Word has length 59 [2024-10-14 02:26:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:26:58,742 INFO L471 AbstractCegarLoop]: Abstraction has 258 states and 308 transitions. [2024-10-14 02:26:58,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2024-10-14 02:26:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 308 transitions. [2024-10-14 02:26:58,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-14 02:26:58,744 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:26:58,744 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:26:58,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-14 02:26:58,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:26:58,946 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:26:58,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:26:58,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721499, now seen corresponding path program 1 times [2024-10-14 02:26:58,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:26:58,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673319918] [2024-10-14 02:26:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:58,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:26:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:26:58,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940981956] [2024-10-14 02:26:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:26:58,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:26:58,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:26:58,983 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:26:58,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 02:26:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:26:59,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 02:26:59,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:26:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-14 02:26:59,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-14 02:27:00,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:00,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673319918] [2024-10-14 02:27:00,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:27:00,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940981956] [2024-10-14 02:27:00,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940981956] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:00,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:27:00,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-10-14 02:27:00,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288833487] [2024-10-14 02:27:00,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:00,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 02:27:00,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:00,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 02:27:00,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-10-14 02:27:00,062 INFO L87 Difference]: Start difference. First operand 258 states and 308 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2024-10-14 02:27:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:00,489 INFO L93 Difference]: Finished difference Result 371 states and 460 transitions. [2024-10-14 02:27:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 02:27:00,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 70 [2024-10-14 02:27:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:00,491 INFO L225 Difference]: With dead ends: 371 [2024-10-14 02:27:00,491 INFO L226 Difference]: Without dead ends: 299 [2024-10-14 02:27:00,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2024-10-14 02:27:00,493 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 40 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:00,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 346 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 02:27:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-10-14 02:27:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 259. [2024-10-14 02:27:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 174 states have (on average 1.1839080459770115) internal successors, (206), 182 states have internal predecessors, (206), 54 states have call successors, (54), 31 states have call predecessors, (54), 30 states have return successors, (51), 45 states have call predecessors, (51), 51 states have call successors, (51) [2024-10-14 02:27:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 311 transitions. [2024-10-14 02:27:00,540 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 311 transitions. Word has length 70 [2024-10-14 02:27:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:00,540 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 311 transitions. [2024-10-14 02:27:00,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2024-10-14 02:27:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 311 transitions. [2024-10-14 02:27:00,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-14 02:27:00,541 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:00,541 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:00,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 02:27:00,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:00,746 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:00,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:00,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1368309367, now seen corresponding path program 2 times [2024-10-14 02:27:00,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:00,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335022863] [2024-10-14 02:27:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:00,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:00,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:00,902 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:00,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:00,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:00,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:00,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:00,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:00,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:27:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:00,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-14 02:27:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:00,943 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-14 02:27:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-14 02:27:00,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:00,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335022863] [2024-10-14 02:27:00,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335022863] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:00,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232198083] [2024-10-14 02:27:00,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 02:27:00,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:00,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:00,948 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:00,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 02:27:00,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 02:27:00,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:27:00,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:27:00,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-14 02:27:01,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-14 02:27:01,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232198083] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:01,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:27:01,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-10-14 02:27:01,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620229537] [2024-10-14 02:27:01,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:01,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:27:01,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:27:01,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:27:01,087 INFO L87 Difference]: Start difference. First operand 259 states and 311 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-14 02:27:01,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:01,147 INFO L93 Difference]: Finished difference Result 294 states and 352 transitions. [2024-10-14 02:27:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 02:27:01,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 4 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 73 [2024-10-14 02:27:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:01,148 INFO L225 Difference]: With dead ends: 294 [2024-10-14 02:27:01,148 INFO L226 Difference]: Without dead ends: 247 [2024-10-14 02:27:01,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:27:01,149 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:01,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:27:01,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-10-14 02:27:01,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 239. [2024-10-14 02:27:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 167 states have internal predecessors, (190), 48 states have call successors, (48), 29 states have call predecessors, (48), 28 states have return successors, (46), 42 states have call predecessors, (46), 46 states have call successors, (46) [2024-10-14 02:27:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 284 transitions. [2024-10-14 02:27:01,182 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 284 transitions. Word has length 73 [2024-10-14 02:27:01,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:01,182 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 284 transitions. [2024-10-14 02:27:01,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-14 02:27:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 284 transitions. [2024-10-14 02:27:01,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-14 02:27:01,183 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:01,183 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 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] [2024-10-14 02:27:01,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-14 02:27:01,387 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,SelfDestructingSolverStorable13 [2024-10-14 02:27:01,388 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:01,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:01,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1423174812, now seen corresponding path program 1 times [2024-10-14 02:27:01,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:01,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821156380] [2024-10-14 02:27:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:01,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,550 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,553 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,556 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:27:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-14 02:27:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-14 02:27:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-14 02:27:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-14 02:27:01,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:01,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821156380] [2024-10-14 02:27:01,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821156380] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:01,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685604137] [2024-10-14 02:27:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:01,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:01,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:01,574 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:01,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 02:27:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:01,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 02:27:01,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-10-14 02:27:01,836 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-10-14 02:27:02,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685604137] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:02,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:27:02,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 10] total 19 [2024-10-14 02:27:02,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020532069] [2024-10-14 02:27:02,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:02,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 02:27:02,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 02:27:02,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-10-14 02:27:02,194 INFO L87 Difference]: Start difference. First operand 239 states and 284 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) [2024-10-14 02:27:02,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:02,523 INFO L93 Difference]: Finished difference Result 252 states and 302 transitions. [2024-10-14 02:27:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 02:27:02,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) Word has length 75 [2024-10-14 02:27:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:02,525 INFO L225 Difference]: With dead ends: 252 [2024-10-14 02:27:02,525 INFO L226 Difference]: Without dead ends: 227 [2024-10-14 02:27:02,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-10-14 02:27:02,525 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:02,525 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 242 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 02:27:02,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-10-14 02:27:02,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2024-10-14 02:27:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 149 states have (on average 1.1812080536912752) internal successors, (176), 154 states have internal predecessors, (176), 44 states have call successors, (44), 27 states have call predecessors, (44), 26 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2024-10-14 02:27:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 262 transitions. [2024-10-14 02:27:02,557 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 262 transitions. Word has length 75 [2024-10-14 02:27:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:02,558 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 262 transitions. [2024-10-14 02:27:02,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) [2024-10-14 02:27:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 262 transitions. [2024-10-14 02:27:02,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-14 02:27:02,558 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:02,558 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:02,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 02:27:02,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 02:27:02,763 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:02,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash -943280831, now seen corresponding path program 1 times [2024-10-14 02:27:02,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:02,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379599660] [2024-10-14 02:27:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:02,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,816 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,820 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,825 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:27:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-14 02:27:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-14 02:27:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,832 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-14 02:27:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,834 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-10-14 02:27:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-10-14 02:27:02,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:02,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379599660] [2024-10-14 02:27:02,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379599660] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:02,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048015961] [2024-10-14 02:27:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:02,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:02,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:02,837 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:02,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 02:27:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:02,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 02:27:02,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-14 02:27:02,921 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:27:02,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048015961] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:27:02,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 02:27:02,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-10-14 02:27:02,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131044548] [2024-10-14 02:27:02,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:27:02,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:27:02,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:02,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:27:02,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:27:02,923 INFO L87 Difference]: Start difference. First operand 220 states and 262 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-14 02:27:02,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:02,989 INFO L93 Difference]: Finished difference Result 242 states and 290 transitions. [2024-10-14 02:27:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:27:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2024-10-14 02:27:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:02,991 INFO L225 Difference]: With dead ends: 242 [2024-10-14 02:27:02,991 INFO L226 Difference]: Without dead ends: 222 [2024-10-14 02:27:02,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:27:02,991 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:02,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 82 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:27:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-10-14 02:27:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2024-10-14 02:27:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 146 states have (on average 1.1506849315068493) internal successors, (168), 149 states have internal predecessors, (168), 42 states have call successors, (42), 25 states have call predecessors, (42), 25 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2024-10-14 02:27:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 251 transitions. [2024-10-14 02:27:03,022 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 251 transitions. Word has length 79 [2024-10-14 02:27:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:03,022 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 251 transitions. [2024-10-14 02:27:03,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-14 02:27:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 251 transitions. [2024-10-14 02:27:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-14 02:27:03,023 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:03,023 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:03,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 02:27:03,223 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,SelfDestructingSolverStorable15 [2024-10-14 02:27:03,224 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:03,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1566685696, now seen corresponding path program 3 times [2024-10-14 02:27:03,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:03,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423486547] [2024-10-14 02:27:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:03,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:27:03,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973883520] [2024-10-14 02:27:03,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 02:27:03,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:03,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:03,271 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:03,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 02:27:03,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 02:27:03,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:27:03,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-14 02:27:03,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-14 02:27:04,020 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-14 02:27:19,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:19,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423486547] [2024-10-14 02:27:19,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:27:19,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973883520] [2024-10-14 02:27:19,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973883520] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:19,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:27:19,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-10-14 02:27:19,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170672504] [2024-10-14 02:27:19,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:19,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 02:27:19,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:19,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 02:27:19,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-10-14 02:27:19,751 INFO L87 Difference]: Start difference. First operand 214 states and 251 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-10-14 02:27:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:24,855 INFO L93 Difference]: Finished difference Result 281 states and 355 transitions. [2024-10-14 02:27:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 02:27:24,855 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 91 [2024-10-14 02:27:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:24,856 INFO L225 Difference]: With dead ends: 281 [2024-10-14 02:27:24,856 INFO L226 Difference]: Without dead ends: 260 [2024-10-14 02:27:24,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2024-10-14 02:27:24,857 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 96 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:24,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 490 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-10-14 02:27:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-10-14 02:27:24,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 238. [2024-10-14 02:27:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 160 states have (on average 1.175) internal successors, (188), 167 states have internal predecessors, (188), 51 states have call successors, (51), 26 states have call predecessors, (51), 26 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2024-10-14 02:27:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 289 transitions. [2024-10-14 02:27:24,901 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 289 transitions. Word has length 91 [2024-10-14 02:27:24,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:24,902 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 289 transitions. [2024-10-14 02:27:24,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-10-14 02:27:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 289 transitions. [2024-10-14 02:27:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-10-14 02:27:24,903 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:24,903 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:24,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-14 02:27:25,106 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,SelfDestructingSolverStorable16 [2024-10-14 02:27:25,107 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:25,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:25,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1284141284, now seen corresponding path program 1 times [2024-10-14 02:27:25,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:25,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902603649] [2024-10-14 02:27:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:25,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,225 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,229 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:27:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-14 02:27:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,245 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-14 02:27:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,252 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-14 02:27:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-14 02:27:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,261 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-10-14 02:27:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,272 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-10-14 02:27:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-10-14 02:27:25,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:25,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902603649] [2024-10-14 02:27:25,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902603649] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:25,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879717849] [2024-10-14 02:27:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:25,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:25,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:25,279 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:25,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 02:27:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 02:27:25,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-10-14 02:27:25,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-10-14 02:27:25,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879717849] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:25,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:27:25,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-10-14 02:27:25,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705789678] [2024-10-14 02:27:25,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:25,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 02:27:25,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 02:27:25,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-10-14 02:27:25,504 INFO L87 Difference]: Start difference. First operand 238 states and 289 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-10-14 02:27:25,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:25,839 INFO L93 Difference]: Finished difference Result 591 states and 740 transitions. [2024-10-14 02:27:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 02:27:25,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 97 [2024-10-14 02:27:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:25,842 INFO L225 Difference]: With dead ends: 591 [2024-10-14 02:27:25,842 INFO L226 Difference]: Without dead ends: 507 [2024-10-14 02:27:25,842 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2024-10-14 02:27:25,843 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 164 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:25,843 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 223 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 02:27:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2024-10-14 02:27:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 488. [2024-10-14 02:27:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 320 states have (on average 1.196875) internal successors, (383), 345 states have internal predecessors, (383), 110 states have call successors, (110), 57 states have call predecessors, (110), 57 states have return successors, (105), 85 states have call predecessors, (105), 105 states have call successors, (105) [2024-10-14 02:27:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 598 transitions. [2024-10-14 02:27:25,933 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 598 transitions. Word has length 97 [2024-10-14 02:27:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:25,934 INFO L471 AbstractCegarLoop]: Abstraction has 488 states and 598 transitions. [2024-10-14 02:27:25,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-10-14 02:27:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 598 transitions. [2024-10-14 02:27:25,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-10-14 02:27:25,935 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:25,935 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:25,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-14 02:27:26,136 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,SelfDestructingSolverStorable17 [2024-10-14 02:27:26,136 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:26,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:26,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1622674746, now seen corresponding path program 2 times [2024-10-14 02:27:26,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:26,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197339278] [2024-10-14 02:27:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:26,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:27:26,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671032288] [2024-10-14 02:27:26,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 02:27:26,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:26,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:26,180 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:26,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 02:27:26,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 02:27:26,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:27:26,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-14 02:27:26,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-14 02:27:27,123 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-14 02:27:39,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:39,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197339278] [2024-10-14 02:27:39,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:27:39,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671032288] [2024-10-14 02:27:39,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671032288] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:39,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:27:39,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2024-10-14 02:27:39,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731104291] [2024-10-14 02:27:39,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:39,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 02:27:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 02:27:39,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-10-14 02:27:39,184 INFO L87 Difference]: Start difference. First operand 488 states and 598 transitions. Second operand has 26 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-10-14 02:27:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:43,466 INFO L93 Difference]: Finished difference Result 533 states and 666 transitions. [2024-10-14 02:27:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-14 02:27:43,467 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 102 [2024-10-14 02:27:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:43,469 INFO L225 Difference]: With dead ends: 533 [2024-10-14 02:27:43,469 INFO L226 Difference]: Without dead ends: 529 [2024-10-14 02:27:43,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 02:27:43,470 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 57 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:43,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 656 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-10-14 02:27:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2024-10-14 02:27:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 490. [2024-10-14 02:27:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 322 states have (on average 1.1925465838509317) internal successors, (384), 346 states have internal predecessors, (384), 110 states have call successors, (110), 58 states have call predecessors, (110), 57 states have return successors, (105), 85 states have call predecessors, (105), 105 states have call successors, (105) [2024-10-14 02:27:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 599 transitions. [2024-10-14 02:27:43,572 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 599 transitions. Word has length 102 [2024-10-14 02:27:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:43,573 INFO L471 AbstractCegarLoop]: Abstraction has 490 states and 599 transitions. [2024-10-14 02:27:43,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-10-14 02:27:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 599 transitions. [2024-10-14 02:27:43,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-10-14 02:27:43,575 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:43,575 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:43,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-14 02:27:43,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:43,779 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:43,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1301888486, now seen corresponding path program 1 times [2024-10-14 02:27:43,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:43,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851470405] [2024-10-14 02:27:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:43,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:43,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,010 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:27:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-14 02:27:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-14 02:27:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-14 02:27:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,025 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-10-14 02:27:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-10-14 02:27:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-14 02:27:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-14 02:27:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-14 02:27:44,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:44,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851470405] [2024-10-14 02:27:44,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851470405] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:44,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955584233] [2024-10-14 02:27:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:44,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:44,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:44,038 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:44,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 02:27:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:44,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 02:27:44,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-14 02:27:44,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-14 02:27:44,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955584233] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:44,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:27:44,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 20 [2024-10-14 02:27:44,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984725409] [2024-10-14 02:27:44,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:44,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 02:27:44,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:44,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 02:27:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=224, Unknown=0, NotChecked=0, Total=380 [2024-10-14 02:27:44,333 INFO L87 Difference]: Start difference. First operand 490 states and 599 transitions. Second operand has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 13 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2024-10-14 02:27:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:44,827 INFO L93 Difference]: Finished difference Result 835 states and 1038 transitions. [2024-10-14 02:27:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 02:27:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 13 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) Word has length 105 [2024-10-14 02:27:44,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:44,840 INFO L225 Difference]: With dead ends: 835 [2024-10-14 02:27:44,840 INFO L226 Difference]: Without dead ends: 789 [2024-10-14 02:27:44,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2024-10-14 02:27:44,841 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 242 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:44,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 264 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 02:27:44,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2024-10-14 02:27:45,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 772. [2024-10-14 02:27:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 516 states have (on average 1.1395348837209303) internal successors, (588), 551 states have internal predecessors, (588), 173 states have call successors, (173), 83 states have call predecessors, (173), 82 states have return successors, (164), 137 states have call predecessors, (164), 164 states have call successors, (164) [2024-10-14 02:27:45,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 925 transitions. [2024-10-14 02:27:45,022 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 925 transitions. Word has length 105 [2024-10-14 02:27:45,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:45,023 INFO L471 AbstractCegarLoop]: Abstraction has 772 states and 925 transitions. [2024-10-14 02:27:45,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 13 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2024-10-14 02:27:45,023 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 925 transitions. [2024-10-14 02:27:45,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-10-14 02:27:45,024 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:45,024 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:45,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-14 02:27:45,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:45,225 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:45,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1303616364, now seen corresponding path program 4 times [2024-10-14 02:27:45,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:45,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721615812] [2024-10-14 02:27:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:45,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,406 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,410 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,416 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:27:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,418 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-14 02:27:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-14 02:27:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-14 02:27:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-10-14 02:27:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,427 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-10-14 02:27:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-14 02:27:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-14 02:27:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-14 02:27:45,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721615812] [2024-10-14 02:27:45,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721615812] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256943959] [2024-10-14 02:27:45,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 02:27:45,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:45,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:45,435 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:45,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 02:27:45,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 02:27:45,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:27:45,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 02:27:45,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-14 02:27:45,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-14 02:27:45,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256943959] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:45,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:27:45,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-10-14 02:27:45,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015463481] [2024-10-14 02:27:45,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:45,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 02:27:45,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:45,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 02:27:45,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 02:27:45,707 INFO L87 Difference]: Start difference. First operand 772 states and 925 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-10-14 02:27:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:45,920 INFO L93 Difference]: Finished difference Result 923 states and 1114 transitions. [2024-10-14 02:27:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:27:45,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 105 [2024-10-14 02:27:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:45,923 INFO L225 Difference]: With dead ends: 923 [2024-10-14 02:27:45,923 INFO L226 Difference]: Without dead ends: 764 [2024-10-14 02:27:45,924 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 02:27:45,924 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:45,924 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 201 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:27:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2024-10-14 02:27:46,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 762. [2024-10-14 02:27:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 510 states have (on average 1.1372549019607843) internal successors, (580), 544 states have internal predecessors, (580), 169 states have call successors, (169), 83 states have call predecessors, (169), 82 states have return successors, (160), 134 states have call predecessors, (160), 160 states have call successors, (160) [2024-10-14 02:27:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 909 transitions. [2024-10-14 02:27:46,097 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 909 transitions. Word has length 105 [2024-10-14 02:27:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:46,098 INFO L471 AbstractCegarLoop]: Abstraction has 762 states and 909 transitions. [2024-10-14 02:27:46,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-10-14 02:27:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 909 transitions. [2024-10-14 02:27:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-10-14 02:27:46,099 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:46,099 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 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] [2024-10-14 02:27:46,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 02:27:46,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:46,300 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:46,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash 831358745, now seen corresponding path program 2 times [2024-10-14 02:27:46,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:46,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280155668] [2024-10-14 02:27:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,569 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,572 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,574 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,581 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:27:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,590 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-14 02:27:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-14 02:27:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-14 02:27:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,600 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-10-14 02:27:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-10-14 02:27:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-14 02:27:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-14 02:27:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,612 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-10-14 02:27:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-10-14 02:27:46,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:46,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280155668] [2024-10-14 02:27:46,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280155668] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:46,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360996070] [2024-10-14 02:27:46,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 02:27:46,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:46,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:46,620 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:46,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 02:27:46,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 02:27:46,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:27:46,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 02:27:46,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-10-14 02:27:47,038 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-10-14 02:27:47,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360996070] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:47,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:27:47,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 26 [2024-10-14 02:27:47,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895914791] [2024-10-14 02:27:47,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:47,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 02:27:47,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:47,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 02:27:47,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-10-14 02:27:47,837 INFO L87 Difference]: Start difference. First operand 762 states and 909 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 23 states have internal predecessors, (74), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2024-10-14 02:27:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:48,522 INFO L93 Difference]: Finished difference Result 808 states and 988 transitions. [2024-10-14 02:27:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 02:27:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 23 states have internal predecessors, (74), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) Word has length 107 [2024-10-14 02:27:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:48,527 INFO L225 Difference]: With dead ends: 808 [2024-10-14 02:27:48,527 INFO L226 Difference]: Without dead ends: 762 [2024-10-14 02:27:48,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 02:27:48,529 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:48,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 442 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 02:27:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2024-10-14 02:27:48,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 722. [2024-10-14 02:27:48,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 483 states have (on average 1.1407867494824016) internal successors, (551), 516 states have internal predecessors, (551), 160 states have call successors, (160), 78 states have call predecessors, (160), 78 states have return successors, (152), 127 states have call predecessors, (152), 152 states have call successors, (152) [2024-10-14 02:27:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 863 transitions. [2024-10-14 02:27:48,768 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 863 transitions. Word has length 107 [2024-10-14 02:27:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:48,768 INFO L471 AbstractCegarLoop]: Abstraction has 722 states and 863 transitions. [2024-10-14 02:27:48,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 23 states have internal predecessors, (74), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2024-10-14 02:27:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 863 transitions. [2024-10-14 02:27:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-10-14 02:27:48,771 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:48,771 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:48,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-14 02:27:48,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-14 02:27:48,975 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:48,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash -446517283, now seen corresponding path program 3 times [2024-10-14 02:27:48,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:48,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951488135] [2024-10-14 02:27:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:48,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,097 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,099 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,102 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,103 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:27:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-14 02:27:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-14 02:27:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-14 02:27:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,114 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-14 02:27:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-14 02:27:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-14 02:27:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,119 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-10-14 02:27:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,124 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-10-14 02:27:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-10-14 02:27:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,127 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-10-14 02:27:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 54 proven. 34 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-10-14 02:27:49,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:49,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951488135] [2024-10-14 02:27:49,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951488135] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:49,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290515217] [2024-10-14 02:27:49,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 02:27:49,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:49,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:49,131 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:49,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 02:27:49,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 02:27:49,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:27:49,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-14 02:27:49,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 164 proven. 47 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2024-10-14 02:27:49,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2024-10-14 02:27:49,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290515217] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:49,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:27:49,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 8] total 24 [2024-10-14 02:27:49,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783247416] [2024-10-14 02:27:49,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:49,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 02:27:49,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:49,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 02:27:49,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-10-14 02:27:49,783 INFO L87 Difference]: Start difference. First operand 722 states and 863 transitions. Second operand has 24 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 14 states have call successors, (42), 4 states have call predecessors, (42), 2 states have return successors, (41), 13 states have call predecessors, (41), 11 states have call successors, (41) [2024-10-14 02:27:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:51,170 INFO L93 Difference]: Finished difference Result 853 states and 1006 transitions. [2024-10-14 02:27:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-14 02:27:51,171 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 14 states have call successors, (42), 4 states have call predecessors, (42), 2 states have return successors, (41), 13 states have call predecessors, (41), 11 states have call successors, (41) Word has length 120 [2024-10-14 02:27:51,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:51,174 INFO L225 Difference]: With dead ends: 853 [2024-10-14 02:27:51,174 INFO L226 Difference]: Without dead ends: 798 [2024-10-14 02:27:51,175 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2024-10-14 02:27:51,175 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 96 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:51,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 640 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 02:27:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2024-10-14 02:27:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 772. [2024-10-14 02:27:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 524 states have (on average 1.1202290076335877) internal successors, (587), 549 states have internal predecessors, (587), 156 states have call successors, (156), 91 states have call predecessors, (156), 91 states have return successors, (149), 131 states have call predecessors, (149), 149 states have call successors, (149) [2024-10-14 02:27:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 892 transitions. [2024-10-14 02:27:51,374 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 892 transitions. Word has length 120 [2024-10-14 02:27:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:51,375 INFO L471 AbstractCegarLoop]: Abstraction has 772 states and 892 transitions. [2024-10-14 02:27:51,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 14 states have call successors, (42), 4 states have call predecessors, (42), 2 states have return successors, (41), 13 states have call predecessors, (41), 11 states have call successors, (41) [2024-10-14 02:27:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 892 transitions. [2024-10-14 02:27:51,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-10-14 02:27:51,376 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:51,377 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:51,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-14 02:27:51,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:51,579 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:51,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1867395829, now seen corresponding path program 5 times [2024-10-14 02:27:51,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:51,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877327571] [2024-10-14 02:27:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:51,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:27:51,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953432117] [2024-10-14 02:27:51,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 02:27:51,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:51,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:51,617 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:51,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 02:27:51,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-10-14 02:27:51,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:27:51,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-14 02:27:51,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 68 proven. 82 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-10-14 02:27:52,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:28:18,538 WARN L286 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 379 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)