./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.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 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 19:37:15,254 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 19:37:15,359 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 19:37:15,365 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 19:37:15,366 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 19:37:15,391 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 19:37:15,391 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 19:37:15,392 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 19:37:15,393 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 19:37:15,394 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 19:37:15,394 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 19:37:15,394 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 19:37:15,395 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 19:37:15,395 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 19:37:15,397 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 19:37:15,397 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 19:37:15,397 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 19:37:15,398 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 19:37:15,398 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 19:37:15,398 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 19:37:15,398 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 19:37:15,402 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 19:37:15,402 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 19:37:15,402 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 19:37:15,403 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 19:37:15,403 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 19:37:15,403 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 19:37:15,403 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 19:37:15,404 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 19:37:15,404 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 19:37:15,404 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 19:37:15,405 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 19:37:15,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:37:15,406 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 19:37:15,406 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 19:37:15,406 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 19:37:15,406 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 19:37:15,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 19:37:15,407 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 19:37:15,407 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 19:37:15,407 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 19:37:15,408 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 19:37:15,408 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 [2024-10-23 19:37:15,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 19:37:15,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 19:37:15,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 19:37:15,703 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 19:37:15,704 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 19:37:15,705 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2024-10-23 19:37:17,154 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 19:37:17,344 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 19:37:17,346 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2024-10-23 19:37:17,356 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb2182bbb/e659d1a3ff5b41348fef700ae0d2b183/FLAG956785c17 [2024-10-23 19:37:17,372 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb2182bbb/e659d1a3ff5b41348fef700ae0d2b183 [2024-10-23 19:37:17,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 19:37:17,377 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 19:37:17,380 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 19:37:17,380 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 19:37:17,386 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 19:37:17,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@266f8bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17, skipping insertion in model container [2024-10-23 19:37:17,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,412 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 19:37:17,615 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/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2024-10-23 19:37:17,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:37:17,632 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 19:37:17,651 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/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2024-10-23 19:37:17,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:37:17,671 INFO L204 MainTranslator]: Completed translation [2024-10-23 19:37:17,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17 WrapperNode [2024-10-23 19:37:17,672 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 19:37:17,673 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 19:37:17,673 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 19:37:17,673 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 19:37:17,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,705 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 73 [2024-10-23 19:37:17,705 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 19:37:17,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 19:37:17,706 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 19:37:17,706 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 19:37:17,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,720 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,740 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-23 19:37:17,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,747 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,751 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,753 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,754 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,756 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 19:37:17,761 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 19:37:17,761 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 19:37:17,761 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 19:37:17,762 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (1/1) ... [2024-10-23 19:37:17,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:37:17,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:37:17,794 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) [2024-10-23 19:37:17,813 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 [2024-10-23 19:37:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 19:37:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 19:37:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-23 19:37:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-23 19:37:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-23 19:37:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-23 19:37:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 19:37:17,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 19:37:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-23 19:37:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-23 19:37:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-23 19:37:17,933 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 19:37:17,935 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 19:37:18,075 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-23 19:37:18,075 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 19:37:18,109 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 19:37:18,109 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-23 19:37:18,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:37:18 BoogieIcfgContainer [2024-10-23 19:37:18,110 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 19:37:18,112 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 19:37:18,112 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 19:37:18,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 19:37:18,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:37:17" (1/3) ... [2024-10-23 19:37:18,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0b351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:37:18, skipping insertion in model container [2024-10-23 19:37:18,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:37:17" (2/3) ... [2024-10-23 19:37:18,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0b351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:37:18, skipping insertion in model container [2024-10-23 19:37:18,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:37:18" (3/3) ... [2024-10-23 19:37:18,120 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2024-10-23 19:37:18,134 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 19:37:18,134 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 19:37:18,189 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 19:37:18,196 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;@3554996f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 19:37:18,196 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 19:37:18,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-23 19:37:18,205 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:37:18,206 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:37:18,206 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:37:18,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:37:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1284800003, now seen corresponding path program 1 times [2024-10-23 19:37:18,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:37:18,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208484743] [2024-10-23 19:37:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:37:18,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:37:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:37:18,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:37:18,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208484743] [2024-10-23 19:37:18,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208484743] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:37:18,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:37:18,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-23 19:37:18,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187437351] [2024-10-23 19:37:18,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:37:18,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:37:18,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:37:18,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:37:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:37:18,480 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:37:18,503 INFO L93 Difference]: Finished difference Result 23 states and 33 transitions. [2024-10-23 19:37:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:37:18,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-23 19:37:18,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:37:18,515 INFO L225 Difference]: With dead ends: 23 [2024-10-23 19:37:18,516 INFO L226 Difference]: Without dead ends: 11 [2024-10-23 19:37:18,518 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:37:18,521 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:37:18,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:37:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-10-23 19:37:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-10-23 19:37:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2024-10-23 19:37:18,548 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2024-10-23 19:37:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:37:18,549 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2024-10-23 19:37:18,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2024-10-23 19:37:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-23 19:37:18,550 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:37:18,550 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:37:18,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 19:37:18,551 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:37:18,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:37:18,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1330956527, now seen corresponding path program 1 times [2024-10-23 19:37:18,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:37:18,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570551669] [2024-10-23 19:37:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:37:18,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:37:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:37:18,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:37:18,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570551669] [2024-10-23 19:37:18,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570551669] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:37:18,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205909919] [2024-10-23 19:37:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:37:18,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:18,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:37:18,669 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) [2024-10-23 19:37:18,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 19:37:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:18,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-23 19:37:18,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:37:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:37:18,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:37:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:37:18,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205909919] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:37:18,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:37:18,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-23 19:37:18,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91153572] [2024-10-23 19:37:18,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:37:18,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-23 19:37:18,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:37:18,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-23 19:37:18,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:37:18,880 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:37:18,913 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2024-10-23 19:37:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 19:37:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-23 19:37:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:37:18,914 INFO L225 Difference]: With dead ends: 22 [2024-10-23 19:37:18,914 INFO L226 Difference]: Without dead ends: 14 [2024-10-23 19:37:18,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:37:18,916 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:37:18,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:37:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-10-23 19:37:18,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-10-23 19:37:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-10-23 19:37:18,926 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2024-10-23 19:37:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:37:18,926 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-10-23 19:37:18,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:18,927 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-10-23 19:37:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-23 19:37:18,928 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:37:18,928 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:37:18,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-23 19:37:19,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:19,133 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:37:19,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:37:19,134 INFO L85 PathProgramCache]: Analyzing trace with hash -533059843, now seen corresponding path program 2 times [2024-10-23 19:37:19,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:37:19,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581350094] [2024-10-23 19:37:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:37:19,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:37:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-23 19:37:19,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:37:19,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581350094] [2024-10-23 19:37:19,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581350094] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:37:19,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:37:19,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-23 19:37:19,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267452974] [2024-10-23 19:37:19,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:37:19,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-23 19:37:19,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:37:19,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-23 19:37:19,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:37:19,380 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:37:19,428 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2024-10-23 19:37:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-23 19:37:19,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-23 19:37:19,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:37:19,431 INFO L225 Difference]: With dead ends: 19 [2024-10-23 19:37:19,432 INFO L226 Difference]: Without dead ends: 16 [2024-10-23 19:37:19,432 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 [2024-10-23 19:37:19,433 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:37:19,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:37:19,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-10-23 19:37:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-10-23 19:37:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-10-23 19:37:19,441 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2024-10-23 19:37:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:37:19,441 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-10-23 19:37:19,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:19,441 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2024-10-23 19:37:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-23 19:37:19,442 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:37:19,442 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:37:19,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-23 19:37:19,443 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:37:19,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:37:19,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1171489088, now seen corresponding path program 1 times [2024-10-23 19:37:19,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:37:19,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552414201] [2024-10-23 19:37:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:37:19,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:37:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 19:37:19,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:37:19,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552414201] [2024-10-23 19:37:19,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552414201] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:37:19,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651069994] [2024-10-23 19:37:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:37:19,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:19,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:37:19,608 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) [2024-10-23 19:37:19,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 19:37:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:19,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-23 19:37:19,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:37:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 19:37:19,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:37:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 19:37:19,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651069994] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:37:19,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:37:19,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-23 19:37:19,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744187811] [2024-10-23 19:37:19,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:37:19,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-23 19:37:19,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:37:19,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-23 19:37:19,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-23 19:37:19,801 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:19,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:37:19,830 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2024-10-23 19:37:19,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-23 19:37:19,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-23 19:37:19,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:37:19,831 INFO L225 Difference]: With dead ends: 32 [2024-10-23 19:37:19,831 INFO L226 Difference]: Without dead ends: 22 [2024-10-23 19:37:19,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-23 19:37:19,833 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:37:19,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:37:19,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-23 19:37:19,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-23 19:37:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-10-23 19:37:19,839 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2024-10-23 19:37:19,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:37:19,839 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-10-23 19:37:19,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-10-23 19:37:19,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-23 19:37:19,840 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:37:19,841 INFO L215 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:37:19,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-23 19:37:20,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-23 19:37:20,047 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:37:20,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:37:20,048 INFO L85 PathProgramCache]: Analyzing trace with hash -795285952, now seen corresponding path program 2 times [2024-10-23 19:37:20,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:37:20,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897724727] [2024-10-23 19:37:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:37:20,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:37:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 19:37:20,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:37:20,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897724727] [2024-10-23 19:37:20,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897724727] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:37:20,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886430474] [2024-10-23 19:37:20,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:37:20,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:20,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:37:20,307 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) [2024-10-23 19:37:20,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 19:37:20,389 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:37:20,389 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:37:20,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-23 19:37:20,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:37:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 19:37:20,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:37:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 19:37:20,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886430474] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:37:20,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:37:20,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-10-23 19:37:20,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768403111] [2024-10-23 19:37:20,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:37:20,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-23 19:37:20,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:37:20,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-23 19:37:20,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-23 19:37:20,718 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:37:20,754 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2024-10-23 19:37:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-23 19:37:20,755 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-23 19:37:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:37:20,756 INFO L225 Difference]: With dead ends: 44 [2024-10-23 19:37:20,756 INFO L226 Difference]: Without dead ends: 34 [2024-10-23 19:37:20,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-23 19:37:20,757 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:37:20,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:37:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-23 19:37:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-23 19:37:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-10-23 19:37:20,763 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 21 [2024-10-23 19:37:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:37:20,763 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-10-23 19:37:20,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-10-23 19:37:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-23 19:37:20,764 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:37:20,765 INFO L215 NwaCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:37:20,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-23 19:37:20,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:20,966 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:37:20,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:37:20,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1216795968, now seen corresponding path program 3 times [2024-10-23 19:37:20,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:37:20,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100692727] [2024-10-23 19:37:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:37:20,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:37:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 19:37:21,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:37:21,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100692727] [2024-10-23 19:37:21,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100692727] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:37:21,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795353322] [2024-10-23 19:37:21,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:37:21,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:21,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:37:21,562 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) [2024-10-23 19:37:21,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-23 19:37:21,636 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-23 19:37:21,637 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:37:21,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-23 19:37:21,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:37:21,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-23 19:37:21,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-23 19:37:21,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-10-23 19:37:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-10-23 19:37:21,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:37:21,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-23 19:37:21,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2024-10-23 19:37:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-10-23 19:37:22,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795353322] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:37:22,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:37:22,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 33 [2024-10-23 19:37:22,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690421563] [2024-10-23 19:37:22,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:37:22,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-23 19:37:22,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:37:22,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-23 19:37:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2024-10-23 19:37:22,015 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:37:22,201 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2024-10-23 19:37:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-23 19:37:22,205 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-10-23 19:37:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:37:22,206 INFO L225 Difference]: With dead ends: 50 [2024-10-23 19:37:22,206 INFO L226 Difference]: Without dead ends: 39 [2024-10-23 19:37:22,207 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2024-10-23 19:37:22,208 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:37:22,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 35 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:37:22,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-23 19:37:22,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-10-23 19:37:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-10-23 19:37:22,217 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2024-10-23 19:37:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:37:22,217 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-10-23 19:37:22,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:22,219 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-10-23 19:37:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-23 19:37:22,220 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:37:22,220 INFO L215 NwaCegarLoop]: trace histogram [23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:37:22,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-23 19:37:22,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:22,421 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:37:22,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:37:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1248449946, now seen corresponding path program 4 times [2024-10-23 19:37:22,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:37:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499168609] [2024-10-23 19:37:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:37:22,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:37:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:37:23,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:37:23,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499168609] [2024-10-23 19:37:23,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499168609] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:37:23,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565402308] [2024-10-23 19:37:23,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:37:23,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:23,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:37:23,054 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) [2024-10-23 19:37:23,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-23 19:37:23,166 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 19:37:23,166 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:37:23,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-23 19:37:23,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:37:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:37:23,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:37:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:37:24,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565402308] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:37:24,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:37:24,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2024-10-23 19:37:24,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537704216] [2024-10-23 19:37:24,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:37:24,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-23 19:37:24,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:37:24,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-23 19:37:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-10-23 19:37:24,035 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:24,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:37:24,094 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2024-10-23 19:37:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-23 19:37:24,095 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-23 19:37:24,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:37:24,096 INFO L225 Difference]: With dead ends: 78 [2024-10-23 19:37:24,096 INFO L226 Difference]: Without dead ends: 64 [2024-10-23 19:37:24,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-10-23 19:37:24,098 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:37:24,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:37:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-23 19:37:24,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-10-23 19:37:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2024-10-23 19:37:24,111 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 38 [2024-10-23 19:37:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:37:24,111 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2024-10-23 19:37:24,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2024-10-23 19:37:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-23 19:37:24,113 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:37:24,113 INFO L215 NwaCegarLoop]: trace histogram [48, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:37:24,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-23 19:37:24,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:24,314 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:37:24,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:37:24,314 INFO L85 PathProgramCache]: Analyzing trace with hash 40994566, now seen corresponding path program 5 times [2024-10-23 19:37:24,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:37:24,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850724800] [2024-10-23 19:37:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:37:24,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:37:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:37:26,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:37:26,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850724800] [2024-10-23 19:37:26,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850724800] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:37:26,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215166746] [2024-10-23 19:37:26,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 19:37:26,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:26,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:37:26,125 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) [2024-10-23 19:37:26,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-23 19:37:37,682 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2024-10-23 19:37:37,682 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:37:37,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-23 19:37:37,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:37:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:37:37,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:37:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:37:40,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215166746] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:37:40,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:37:40,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2024-10-23 19:37:40,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679392153] [2024-10-23 19:37:40,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:37:40,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-10-23 19:37:40,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:37:40,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-10-23 19:37:40,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2024-10-23 19:37:40,720 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 100 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:40,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:37:40,890 INFO L93 Difference]: Finished difference Result 128 states and 179 transitions. [2024-10-23 19:37:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-10-23 19:37:40,896 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 100 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-10-23 19:37:40,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:37:40,897 INFO L225 Difference]: With dead ends: 128 [2024-10-23 19:37:40,897 INFO L226 Difference]: Without dead ends: 114 [2024-10-23 19:37:40,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2024-10-23 19:37:40,903 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:37:40,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:37:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-10-23 19:37:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-10-23 19:37:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2024-10-23 19:37:40,920 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 63 [2024-10-23 19:37:40,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:37:40,922 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2024-10-23 19:37:40,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 100 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2024-10-23 19:37:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-10-23 19:37:40,926 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:37:40,926 INFO L215 NwaCegarLoop]: trace histogram [98, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:37:40,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-23 19:37:41,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:41,127 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:37:41,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:37:41,128 INFO L85 PathProgramCache]: Analyzing trace with hash -788789882, now seen corresponding path program 6 times [2024-10-23 19:37:41,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:37:41,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325760508] [2024-10-23 19:37:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:37:41,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:37:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4863 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:37:46,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:37:46,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325760508] [2024-10-23 19:37:46,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325760508] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:37:46,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358682526] [2024-10-23 19:37:46,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 19:37:46,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:46,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:37:46,556 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) [2024-10-23 19:37:46,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-23 19:37:46,854 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-23 19:37:46,854 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:37:46,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-23 19:37:46,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:37:47,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-23 19:37:47,431 INFO L349 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2024-10-23 19:37:47,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 47 [2024-10-23 19:37:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4863 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2024-10-23 19:37:47,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:37:48,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2024-10-23 19:37:48,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-23 19:37:48,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 50 [2024-10-23 19:37:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4863 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-10-23 19:37:48,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358682526] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:37:48,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:37:48,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 12, 11] total 121 [2024-10-23 19:37:48,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705313547] [2024-10-23 19:37:48,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:37:48,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-10-23 19:37:48,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:37:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-10-23 19:37:48,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5244, Invalid=9276, Unknown=0, NotChecked=0, Total=14520 [2024-10-23 19:37:48,544 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 121 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 121 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:54,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:37:54,046 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2024-10-23 19:37:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2024-10-23 19:37:54,046 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 121 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2024-10-23 19:37:54,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:37:54,050 INFO L225 Difference]: With dead ends: 138 [2024-10-23 19:37:54,050 INFO L226 Difference]: Without dead ends: 123 [2024-10-23 19:37:54,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8619 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=15367, Invalid=36389, Unknown=0, NotChecked=0, Total=51756 [2024-10-23 19:37:54,056 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 19:37:54,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 50 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 19:37:54,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-23 19:37:54,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-10-23 19:37:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2024-10-23 19:37:54,073 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 113 [2024-10-23 19:37:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:37:54,073 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2024-10-23 19:37:54,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 121 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:37:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2024-10-23 19:37:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-10-23 19:37:54,075 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:37:54,075 INFO L215 NwaCegarLoop]: trace histogram [99, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:37:54,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-23 19:37:54,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:54,276 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:37:54,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:37:54,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1201228838, now seen corresponding path program 7 times [2024-10-23 19:37:54,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:37:54,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119223801] [2024-10-23 19:37:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:37:54,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:37:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5006 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-10-23 19:37:59,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:37:59,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119223801] [2024-10-23 19:37:59,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119223801] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:37:59,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299968952] [2024-10-23 19:37:59,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-23 19:37:59,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:37:59,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:37:59,656 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) [2024-10-23 19:37:59,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-23 19:37:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:37:59,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-10-23 19:37:59,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:38:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5006 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-10-23 19:38:00,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:38:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5006 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-10-23 19:38:09,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299968952] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:38:09,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:38:09,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2024-10-23 19:38:09,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671815448] [2024-10-23 19:38:09,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:38:09,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2024-10-23 19:38:09,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:38:09,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2024-10-23 19:38:09,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2024-10-23 19:38:09,976 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 203 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 202 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:38:10,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:38:10,328 INFO L93 Difference]: Finished difference Result 246 states and 348 transitions. [2024-10-23 19:38:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2024-10-23 19:38:10,329 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 202 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2024-10-23 19:38:10,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:38:10,332 INFO L225 Difference]: With dead ends: 246 [2024-10-23 19:38:10,332 INFO L226 Difference]: Without dead ends: 224 [2024-10-23 19:38:10,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2024-10-23 19:38:10,337 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:38:10,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:38:10,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-10-23 19:38:10,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2024-10-23 19:38:10,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 223 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:38:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2024-10-23 19:38:10,357 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 122 [2024-10-23 19:38:10,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:38:10,357 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2024-10-23 19:38:10,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 202 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:38:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2024-10-23 19:38:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-10-23 19:38:10,361 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:38:10,361 INFO L215 NwaCegarLoop]: trace histogram [200, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:38:10,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-23 19:38:10,561 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,SelfDestructingSolverStorable9 [2024-10-23 19:38:10,562 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:38:10,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:38:10,562 INFO L85 PathProgramCache]: Analyzing trace with hash 254062226, now seen corresponding path program 8 times [2024-10-23 19:38:10,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:38:10,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773944305] [2024-10-23 19:38:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:38:10,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:38:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:38:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20156 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-10-23 19:38:29,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:38:29,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773944305] [2024-10-23 19:38:29,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773944305] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:38:29,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658183332] [2024-10-23 19:38:29,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:38:29,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:38:29,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:38:29,857 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) [2024-10-23 19:38:29,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-23 19:38:30,319 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:38:30,320 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:38:30,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-10-23 19:38:30,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:38:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20156 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-10-23 19:38:30,596 INFO L311 TraceCheckSpWp]: Computing backward predicates...