./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg40-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg40-2.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 21c974f13172a377e01c3d90378bf51a06f0d50f73d7b77ee448dcdb2047e228 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 21:57:32,320 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 21:57:32,397 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 21:57:32,402 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 21:57:32,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 21:57:32,433 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 21:57:32,434 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 21:57:32,434 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 21:57:32,435 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 21:57:32,437 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 21:57:32,437 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 21:57:32,437 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 21:57:32,438 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 21:57:32,438 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 21:57:32,440 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 21:57:32,441 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 21:57:32,441 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 21:57:32,441 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 21:57:32,442 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 21:57:32,442 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 21:57:32,442 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 21:57:32,443 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 21:57:32,444 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 21:57:32,444 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 21:57:32,444 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 21:57:32,444 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 21:57:32,444 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 21:57:32,445 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 21:57:32,445 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 21:57:32,445 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 21:57:32,445 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 21:57:32,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 21:57:32,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 21:57:32,446 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 21:57:32,446 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 21:57:32,447 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 21:57:32,447 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 21:57:32,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 21:57:32,451 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 21:57:32,452 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 21:57:32,452 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 21:57:32,453 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 21:57:32,453 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21c974f13172a377e01c3d90378bf51a06f0d50f73d7b77ee448dcdb2047e228 [2024-10-10 21:57:32,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 21:57:32,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 21:57:32,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 21:57:32,800 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 21:57:32,801 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 21:57:32,802 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg40-2.i [2024-10-10 21:57:34,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 21:57:34,505 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 21:57:34,506 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg40-2.i [2024-10-10 21:57:34,516 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/d1b4d374f/233b9d2a0915441aaefb06057adefdc3/FLAG21e37a6fc [2024-10-10 21:57:34,534 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/d1b4d374f/233b9d2a0915441aaefb06057adefdc3 [2024-10-10 21:57:34,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 21:57:34,539 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 21:57:34,540 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 21:57:34,542 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 21:57:34,548 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 21:57:34,549 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28bca2d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34, skipping insertion in model container [2024-10-10 21:57:34,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,574 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 21:57:34,773 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/reducercommutativity/avg40-2.i[1282,1295] [2024-10-10 21:57:34,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 21:57:34,788 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 21:57:34,808 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/reducercommutativity/avg40-2.i[1282,1295] [2024-10-10 21:57:34,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 21:57:34,828 INFO L204 MainTranslator]: Completed translation [2024-10-10 21:57:34,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34 WrapperNode [2024-10-10 21:57:34,829 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 21:57:34,831 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 21:57:34,831 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 21:57:34,831 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 21:57:34,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,845 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,866 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-10-10 21:57:34,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 21:57:34,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 21:57:34,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 21:57:34,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 21:57:34,878 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,880 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,898 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-10-10 21:57:34,899 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,899 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,906 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,913 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,914 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,915 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,921 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 21:57:34,922 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 21:57:34,922 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 21:57:34,922 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 21:57:34,923 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (1/1) ... [2024-10-10 21:57:34,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 21:57:34,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:34,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 21:57:34,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 21:57:35,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 21:57:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 21:57:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 21:57:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 21:57:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 21:57:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 21:57:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2024-10-10 21:57:35,003 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2024-10-10 21:57:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 21:57:35,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 21:57:35,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 21:57:35,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 21:57:35,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 21:57:35,074 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 21:57:35,076 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 21:57:35,328 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-10-10 21:57:35,330 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 21:57:35,360 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 21:57:35,361 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-10 21:57:35,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 09:57:35 BoogieIcfgContainer [2024-10-10 21:57:35,361 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 21:57:35,363 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 21:57:35,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 21:57:35,366 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 21:57:35,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 09:57:34" (1/3) ... [2024-10-10 21:57:35,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b45b94d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 09:57:35, skipping insertion in model container [2024-10-10 21:57:35,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:34" (2/3) ... [2024-10-10 21:57:35,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b45b94d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 09:57:35, skipping insertion in model container [2024-10-10 21:57:35,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 09:57:35" (3/3) ... [2024-10-10 21:57:35,369 INFO L112 eAbstractionObserver]: Analyzing ICFG avg40-2.i [2024-10-10 21:57:35,389 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 21:57:35,390 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 21:57:35,452 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 21:57:35,459 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;@295d0f88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 21:57:35,460 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 21:57:35,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-10 21:57:35,469 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:35,470 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:35,470 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:35,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:35,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1444276640, now seen corresponding path program 1 times [2024-10-10 21:57:35,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:35,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329833370] [2024-10-10 21:57:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:35,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:35,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-10 21:57:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:35,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-10 21:57:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:35,853 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-10 21:57:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 21:57:35,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:35,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329833370] [2024-10-10 21:57:35,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329833370] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:35,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128643245] [2024-10-10 21:57:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:35,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:35,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:35,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:35,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 21:57:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:35,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-10 21:57:35,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 21:57:36,010 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 21:57:36,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128643245] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:57:36,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 21:57:36,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2024-10-10 21:57:36,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955851128] [2024-10-10 21:57:36,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:57:36,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 21:57:36,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:36,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 21:57:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 21:57:36,043 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:57:36,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:36,085 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2024-10-10 21:57:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 21:57:36,089 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-10-10 21:57:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:36,098 INFO L225 Difference]: With dead ends: 38 [2024-10-10 21:57:36,098 INFO L226 Difference]: Without dead ends: 18 [2024-10-10 21:57:36,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 21:57:36,106 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:36,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-10 21:57:36,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-10 21:57:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-10-10 21:57:36,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 25 [2024-10-10 21:57:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:36,149 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-10-10 21:57:36,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:57:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-10-10 21:57:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-10 21:57:36,152 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:36,152 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:36,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-10 21:57:36,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-10 21:57:36,357 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:36,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:36,358 INFO L85 PathProgramCache]: Analyzing trace with hash -265195610, now seen corresponding path program 1 times [2024-10-10 21:57:36,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:36,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834706876] [2024-10-10 21:57:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:36,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:36,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-10 21:57:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:36,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-10 21:57:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:36,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-10 21:57:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 21:57:36,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:36,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834706876] [2024-10-10 21:57:36,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834706876] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:36,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059545855] [2024-10-10 21:57:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:36,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:36,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:36,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:36,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 21:57:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:36,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 21:57:36,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-10 21:57:36,615 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 21:57:36,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059545855] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:57:36,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 21:57:36,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-10-10 21:57:36,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80379926] [2024-10-10 21:57:36,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:57:36,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:57:36,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:36,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:57:36,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:57:36,620 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 21:57:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:36,642 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2024-10-10 21:57:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:57:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-10-10 21:57:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:36,644 INFO L225 Difference]: With dead ends: 35 [2024-10-10 21:57:36,644 INFO L226 Difference]: Without dead ends: 19 [2024-10-10 21:57:36,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:57:36,648 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:36,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-10 21:57:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-10 21:57:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-10-10 21:57:36,657 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 25 [2024-10-10 21:57:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:36,657 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-10-10 21:57:36,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 21:57:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-10-10 21:57:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-10 21:57:36,660 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:36,660 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:36,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-10 21:57:36,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:36,865 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:36,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:36,866 INFO L85 PathProgramCache]: Analyzing trace with hash 774126172, now seen corresponding path program 1 times [2024-10-10 21:57:36,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:36,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064597551] [2024-10-10 21:57:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:36,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:36,989 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 21:57:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-10 21:57:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-10 21:57:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 21:57:37,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:37,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064597551] [2024-10-10 21:57:37,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064597551] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:37,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588978583] [2024-10-10 21:57:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:37,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:37,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:37,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:37,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 21:57:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 21:57:37,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-10 21:57:37,127 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 21:57:37,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588978583] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:57:37,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 21:57:37,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-10-10 21:57:37,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539411509] [2024-10-10 21:57:37,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:57:37,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:57:37,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:37,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:57:37,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:57:37,130 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:57:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:37,151 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2024-10-10 21:57:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:57:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-10-10 21:57:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:37,155 INFO L225 Difference]: With dead ends: 34 [2024-10-10 21:57:37,155 INFO L226 Difference]: Without dead ends: 20 [2024-10-10 21:57:37,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:57:37,156 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:37,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-10 21:57:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-10 21:57:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:37,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-10 21:57:37,162 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 26 [2024-10-10 21:57:37,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:37,163 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-10 21:57:37,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:57:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-10 21:57:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-10 21:57:37,167 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:37,167 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:37,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-10 21:57:37,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:37,368 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:37,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash 406480427, now seen corresponding path program 1 times [2024-10-10 21:57:37,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:37,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286660728] [2024-10-10 21:57:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:37,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 21:57:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-10 21:57:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-10 21:57:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-10 21:57:37,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:37,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286660728] [2024-10-10 21:57:37,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286660728] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:37,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029815092] [2024-10-10 21:57:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:37,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:37,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:37,501 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:37,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 21:57:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 21:57:37,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-10 21:57:37,601 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 21:57:37,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029815092] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:57:37,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 21:57:37,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-10 21:57:37,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690286716] [2024-10-10 21:57:37,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:57:37,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:57:37,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:37,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:57:37,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:57:37,603 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:57:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:37,629 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-10-10 21:57:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:57:37,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2024-10-10 21:57:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:37,631 INFO L225 Difference]: With dead ends: 32 [2024-10-10 21:57:37,631 INFO L226 Difference]: Without dead ends: 21 [2024-10-10 21:57:37,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:57:37,633 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:37,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:37,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-10 21:57:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-10 21:57:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-10-10 21:57:37,640 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 29 [2024-10-10 21:57:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:37,641 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-10-10 21:57:37,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:57:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-10-10 21:57:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-10 21:57:37,646 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:37,646 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:37,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-10 21:57:37,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:37,847 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:37,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1488649810, now seen corresponding path program 1 times [2024-10-10 21:57:37,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:37,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114805406] [2024-10-10 21:57:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:37,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,925 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 21:57:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-10 21:57:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,947 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-10 21:57:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 21:57:37,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:37,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114805406] [2024-10-10 21:57:37,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114805406] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:37,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329932232] [2024-10-10 21:57:37,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:37,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:37,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:37,958 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:37,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 21:57:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:38,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-10 21:57:38,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 21:57:38,062 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 21:57:38,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329932232] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:38,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:38,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-10-10 21:57:38,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485824985] [2024-10-10 21:57:38,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:38,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-10 21:57:38,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:38,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-10 21:57:38,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-10 21:57:38,110 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 21:57:38,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:38,139 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2024-10-10 21:57:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-10 21:57:38,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2024-10-10 21:57:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:38,140 INFO L225 Difference]: With dead ends: 42 [2024-10-10 21:57:38,140 INFO L226 Difference]: Without dead ends: 24 [2024-10-10 21:57:38,141 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-10 21:57:38,141 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:38,142 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:38,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-10 21:57:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-10 21:57:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-10-10 21:57:38,146 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2024-10-10 21:57:38,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:38,146 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-10-10 21:57:38,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 21:57:38,146 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-10-10 21:57:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-10 21:57:38,147 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:38,147 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:38,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-10 21:57:38,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:38,348 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:38,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:38,349 INFO L85 PathProgramCache]: Analyzing trace with hash -944391140, now seen corresponding path program 2 times [2024-10-10 21:57:38,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:38,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296825186] [2024-10-10 21:57:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:38,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:38,418 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-10 21:57:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:38,442 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-10 21:57:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:38,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-10 21:57:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-10 21:57:38,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:38,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296825186] [2024-10-10 21:57:38,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296825186] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:38,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563386240] [2024-10-10 21:57:38,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 21:57:38,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:38,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:38,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:38,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 21:57:38,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 21:57:38,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:38,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 21:57:38,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 21:57:38,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 21:57:38,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563386240] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:38,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:38,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-10-10 21:57:38,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668753624] [2024-10-10 21:57:38,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:38,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 21:57:38,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:38,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 21:57:38,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-10 21:57:38,747 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-10 21:57:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:38,782 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2024-10-10 21:57:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-10 21:57:38,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2024-10-10 21:57:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:38,784 INFO L225 Difference]: With dead ends: 49 [2024-10-10 21:57:38,784 INFO L226 Difference]: Without dead ends: 31 [2024-10-10 21:57:38,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-10 21:57:38,785 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 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 [2024-10-10 21:57:38,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:38,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-10 21:57:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-10-10 21:57:38,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-10-10 21:57:38,794 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 33 [2024-10-10 21:57:38,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:38,794 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-10-10 21:57:38,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-10 21:57:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-10-10 21:57:38,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-10 21:57:38,795 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:38,795 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:38,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-10 21:57:38,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-10 21:57:38,996 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:38,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:38,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1083945041, now seen corresponding path program 3 times [2024-10-10 21:57:38,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:38,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949024126] [2024-10-10 21:57:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:38,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:39,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:57:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:39,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-10 21:57:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:39,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-10 21:57:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-10 21:57:39,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:39,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949024126] [2024-10-10 21:57:39,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949024126] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:39,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063253233] [2024-10-10 21:57:39,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 21:57:39,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:39,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:39,106 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:39,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 21:57:39,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-10 21:57:39,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:39,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 21:57:39,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-10 21:57:39,199 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-10 21:57:39,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063253233] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:39,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:39,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2024-10-10 21:57:39,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273963310] [2024-10-10 21:57:39,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:39,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-10 21:57:39,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:39,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-10 21:57:39,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-10 21:57:39,244 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 21:57:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:39,296 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2024-10-10 21:57:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-10 21:57:39,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-10-10 21:57:39,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:39,298 INFO L225 Difference]: With dead ends: 53 [2024-10-10 21:57:39,299 INFO L226 Difference]: Without dead ends: 36 [2024-10-10 21:57:39,299 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-10 21:57:39,299 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:39,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-10 21:57:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-10 21:57:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-10-10 21:57:39,310 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2024-10-10 21:57:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:39,311 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-10-10 21:57:39,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 21:57:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-10-10 21:57:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-10 21:57:39,314 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:39,314 INFO L215 NwaCegarLoop]: trace histogram [18, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:39,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 21:57:39,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:39,515 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:39,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:39,515 INFO L85 PathProgramCache]: Analyzing trace with hash -407743002, now seen corresponding path program 4 times [2024-10-10 21:57:39,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:39,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742363275] [2024-10-10 21:57:39,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:39,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:39,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:57:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:39,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-10 21:57:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:39,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-10 21:57:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-10 21:57:39,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:39,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742363275] [2024-10-10 21:57:39,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742363275] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:39,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950798825] [2024-10-10 21:57:39,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 21:57:39,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:39,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:39,843 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:39,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 21:57:39,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 21:57:39,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:39,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-10 21:57:39,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-10 21:57:39,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-10 21:57:40,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950798825] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:40,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:40,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2024-10-10 21:57:40,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428028823] [2024-10-10 21:57:40,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:40,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-10 21:57:40,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:40,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-10 21:57:40,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-10 21:57:40,222 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 21:57:40,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:40,277 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2024-10-10 21:57:40,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-10 21:57:40,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2024-10-10 21:57:40,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:40,280 INFO L225 Difference]: With dead ends: 72 [2024-10-10 21:57:40,280 INFO L226 Difference]: Without dead ends: 48 [2024-10-10 21:57:40,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-10 21:57:40,281 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:40,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:40,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-10 21:57:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-10 21:57:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-10-10 21:57:40,291 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 55 [2024-10-10 21:57:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:40,291 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-10-10 21:57:40,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 21:57:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-10-10 21:57:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-10 21:57:40,292 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:40,293 INFO L215 NwaCegarLoop]: trace histogram [22, 18, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:40,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-10 21:57:40,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-10 21:57:40,494 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:40,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:40,494 INFO L85 PathProgramCache]: Analyzing trace with hash 446443110, now seen corresponding path program 5 times [2024-10-10 21:57:40,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:40,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005803946] [2024-10-10 21:57:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:40,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:41,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-10 21:57:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:41,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-10 21:57:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:41,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-10 21:57:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-10 21:57:41,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:41,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005803946] [2024-10-10 21:57:41,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005803946] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:41,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240015419] [2024-10-10 21:57:41,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 21:57:41,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:41,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:41,239 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:41,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 21:57:41,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-10-10 21:57:41,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:41,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 21:57:41,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 104 proven. 3 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2024-10-10 21:57:41,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2024-10-10 21:57:42,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240015419] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:42,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:42,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2024-10-10 21:57:42,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673345764] [2024-10-10 21:57:42,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:42,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-10 21:57:42,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:42,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-10 21:57:42,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2024-10-10 21:57:42,052 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 21:57:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:42,121 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2024-10-10 21:57:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-10 21:57:42,122 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2024-10-10 21:57:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:42,123 INFO L225 Difference]: With dead ends: 77 [2024-10-10 21:57:42,124 INFO L226 Difference]: Without dead ends: 53 [2024-10-10 21:57:42,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2024-10-10 21:57:42,125 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:42,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 21:57:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-10 21:57:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-10-10 21:57:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2024-10-10 21:57:42,137 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 67 [2024-10-10 21:57:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:42,138 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2024-10-10 21:57:42,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 21:57:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2024-10-10 21:57:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-10 21:57:42,139 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:42,139 INFO L215 NwaCegarLoop]: trace histogram [23, 18, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:42,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-10 21:57:42,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:42,340 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:42,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash -372261668, now seen corresponding path program 6 times [2024-10-10 21:57:42,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:42,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006839902] [2024-10-10 21:57:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:42,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:43,032 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-10 21:57:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:43,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-10 21:57:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:43,049 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-10 21:57:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-10-10 21:57:43,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:43,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006839902] [2024-10-10 21:57:43,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006839902] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:43,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434080793] [2024-10-10 21:57:43,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 21:57:43,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:43,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:43,060 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:43,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 21:57:43,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-10 21:57:43,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:43,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 21:57:43,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2024-10-10 21:57:43,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2024-10-10 21:57:43,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434080793] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:43,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:43,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2024-10-10 21:57:43,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30559668] [2024-10-10 21:57:43,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:43,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-10 21:57:43,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:43,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-10 21:57:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2024-10-10 21:57:43,600 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 21:57:43,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:43,676 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2024-10-10 21:57:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-10 21:57:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 72 [2024-10-10 21:57:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:43,680 INFO L225 Difference]: With dead ends: 90 [2024-10-10 21:57:43,680 INFO L226 Difference]: Without dead ends: 62 [2024-10-10 21:57:43,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2024-10-10 21:57:43,682 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:43,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 21:57:43,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-10 21:57:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-10 21:57:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-10-10 21:57:43,691 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 72 [2024-10-10 21:57:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:43,692 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-10-10 21:57:43,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 21:57:43,692 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-10-10 21:57:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-10-10 21:57:43,695 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:43,695 INFO L215 NwaCegarLoop]: trace histogram [42, 24, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:43,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-10 21:57:43,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-10 21:57:43,896 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:43,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:43,897 INFO L85 PathProgramCache]: Analyzing trace with hash -62936090, now seen corresponding path program 7 times [2024-10-10 21:57:43,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:43,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517281527] [2024-10-10 21:57:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:43,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:44,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-10 21:57:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:44,700 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-10 21:57:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:44,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-10 21:57:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2024-10-10 21:57:44,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:44,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517281527] [2024-10-10 21:57:44,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517281527] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:44,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720181750] [2024-10-10 21:57:44,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 21:57:44,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:44,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:44,721 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:44,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-10 21:57:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:44,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-10 21:57:44,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2024-10-10 21:57:44,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2024-10-10 21:57:45,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720181750] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:45,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:45,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 43 [2024-10-10 21:57:45,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403821512] [2024-10-10 21:57:45,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:45,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-10 21:57:45,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:45,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-10 21:57:45,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2024-10-10 21:57:45,567 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 21:57:45,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:45,633 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2024-10-10 21:57:45,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-10 21:57:45,634 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 97 [2024-10-10 21:57:45,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:45,635 INFO L225 Difference]: With dead ends: 114 [2024-10-10 21:57:45,635 INFO L226 Difference]: Without dead ends: 78 [2024-10-10 21:57:45,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 173 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2024-10-10 21:57:45,636 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:45,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 21:57:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-10 21:57:45,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-10-10 21:57:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2024-10-10 21:57:45,645 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 97 [2024-10-10 21:57:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:45,646 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2024-10-10 21:57:45,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 21:57:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2024-10-10 21:57:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-10-10 21:57:45,647 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:45,647 INFO L215 NwaCegarLoop]: trace histogram [42, 40, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:45,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-10 21:57:45,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-10 21:57:45,848 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:45,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:45,848 INFO L85 PathProgramCache]: Analyzing trace with hash 45687270, now seen corresponding path program 8 times [2024-10-10 21:57:45,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:45,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935094703] [2024-10-10 21:57:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:45,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:46,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-10 21:57:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:46,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-10 21:57:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:46,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-10-10 21:57:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 1281 trivial. 0 not checked. [2024-10-10 21:57:46,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:46,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935094703] [2024-10-10 21:57:46,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935094703] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:46,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961986827] [2024-10-10 21:57:46,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 21:57:46,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:46,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:46,490 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:46,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-10 21:57:46,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 21:57:46,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:46,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-10 21:57:46,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 452 proven. 105 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2024-10-10 21:57:46,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 1281 trivial. 0 not checked. [2024-10-10 21:57:47,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961986827] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:47,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:47,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2024-10-10 21:57:47,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791691274] [2024-10-10 21:57:47,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:47,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-10 21:57:47,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:47,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-10 21:57:47,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2024-10-10 21:57:47,049 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 21:57:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:47,100 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2024-10-10 21:57:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-10 21:57:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2024-10-10 21:57:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:47,101 INFO L225 Difference]: With dead ends: 128 [2024-10-10 21:57:47,102 INFO L226 Difference]: Without dead ends: 94 [2024-10-10 21:57:47,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2024-10-10 21:57:47,103 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:47,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-10-10 21:57:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-10-10 21:57:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2024-10-10 21:57:47,110 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 113 [2024-10-10 21:57:47,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:47,110 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2024-10-10 21:57:47,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 21:57:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2024-10-10 21:57:47,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-10-10 21:57:47,112 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:47,112 INFO L215 NwaCegarLoop]: trace histogram [90, 40, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:47,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-10 21:57:47,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:47,313 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:47,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:47,313 INFO L85 PathProgramCache]: Analyzing trace with hash -239179034, now seen corresponding path program 9 times [2024-10-10 21:57:47,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:47,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122290694] [2024-10-10 21:57:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:47,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:48,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-10 21:57:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:48,582 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-10-10 21:57:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:48,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-10-10 21:57:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5128 backedges. 0 proven. 2391 refuted. 0 times theorem prover too weak. 2737 trivial. 0 not checked. [2024-10-10 21:57:48,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:48,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122290694] [2024-10-10 21:57:48,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122290694] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:48,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281100459] [2024-10-10 21:57:48,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 21:57:48,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:48,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:48,618 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:48,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-10 21:57:48,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-10 21:57:48,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:48,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 21:57:48,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5128 backedges. 1928 proven. 21 refuted. 0 times theorem prover too weak. 3179 trivial. 0 not checked. [2024-10-10 21:57:48,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5128 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5107 trivial. 0 not checked. [2024-10-10 21:57:49,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281100459] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:49,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:49,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 9, 9] total 47 [2024-10-10 21:57:49,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749604839] [2024-10-10 21:57:49,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:49,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-10 21:57:49,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:49,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-10 21:57:49,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2024-10-10 21:57:49,158 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 21:57:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:49,224 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2024-10-10 21:57:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-10-10 21:57:49,225 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 161 [2024-10-10 21:57:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:49,226 INFO L225 Difference]: With dead ends: 153 [2024-10-10 21:57:49,226 INFO L226 Difference]: Without dead ends: 103 [2024-10-10 21:57:49,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2024-10-10 21:57:49,228 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:49,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 21:57:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-10 21:57:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-10-10 21:57:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2024-10-10 21:57:49,236 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 161 [2024-10-10 21:57:49,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:49,236 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2024-10-10 21:57:49,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 21:57:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2024-10-10 21:57:49,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-10-10 21:57:49,238 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:49,238 INFO L215 NwaCegarLoop]: trace histogram [93, 40, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:49,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-10 21:57:49,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:49,439 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:49,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:49,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1540403359, now seen corresponding path program 10 times [2024-10-10 21:57:49,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:49,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102545272] [2024-10-10 21:57:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:49,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:50,145 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-10 21:57:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:50,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-10-10 21:57:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:50,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-10-10 21:57:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5494 backedges. 0 proven. 2548 refuted. 0 times theorem prover too weak. 2946 trivial. 0 not checked. [2024-10-10 21:57:50,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:50,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102545272] [2024-10-10 21:57:50,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102545272] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:50,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164986983] [2024-10-10 21:57:50,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 21:57:50,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:50,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:50,782 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:50,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-10 21:57:51,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 21:57:51,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:51,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-10 21:57:51,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5494 backedges. 2050 proven. 496 refuted. 0 times theorem prover too weak. 2948 trivial. 0 not checked. [2024-10-10 21:57:51,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5494 backedges. 0 proven. 2548 refuted. 0 times theorem prover too weak. 2946 trivial. 0 not checked. [2024-10-10 21:57:51,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164986983] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:51,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:51,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 42 [2024-10-10 21:57:51,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918329677] [2024-10-10 21:57:51,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:51,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-10 21:57:51,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:51,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-10 21:57:51,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2024-10-10 21:57:51,883 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 42 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 21:57:51,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:51,932 INFO L93 Difference]: Finished difference Result 171 states and 189 transitions. [2024-10-10 21:57:51,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-10 21:57:51,932 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 172 [2024-10-10 21:57:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:51,933 INFO L225 Difference]: With dead ends: 171 [2024-10-10 21:57:51,933 INFO L226 Difference]: Without dead ends: 112 [2024-10-10 21:57:51,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 318 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2024-10-10 21:57:51,935 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:51,935 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:51,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-10 21:57:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-10-10 21:57:51,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2024-10-10 21:57:51,943 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 172 [2024-10-10 21:57:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:51,944 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2024-10-10 21:57:51,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 21:57:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2024-10-10 21:57:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-10-10 21:57:51,946 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:51,946 INFO L215 NwaCegarLoop]: trace histogram [120, 40, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:51,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-10 21:57:52,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-10 21:57:52,151 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:52,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:52,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1709788922, now seen corresponding path program 11 times [2024-10-10 21:57:52,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:52,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127580483] [2024-10-10 21:57:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:52,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:52,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-10 21:57:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:52,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-10-10 21:57:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:52,782 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2024-10-10 21:57:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8437 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 8332 trivial. 0 not checked. [2024-10-10 21:57:52,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:52,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127580483] [2024-10-10 21:57:52,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127580483] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:52,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834043223] [2024-10-10 21:57:52,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 21:57:52,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:52,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:52,807 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:52,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process