./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array12_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array12_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 09:16:58,176 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 09:16:58,249 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 09:16:58,256 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 09:16:58,257 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 09:16:58,311 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 09:16:58,311 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 09:16:58,312 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 09:16:58,313 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 09:16:58,318 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 09:16:58,318 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 09:16:58,318 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 09:16:58,319 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 09:16:58,319 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 09:16:58,320 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 09:16:58,320 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 09:16:58,320 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 09:16:58,320 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 09:16:58,321 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 09:16:58,321 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 09:16:58,321 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 09:16:58,322 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 09:16:58,322 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 09:16:58,324 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 09:16:58,324 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 09:16:58,325 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 09:16:58,325 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 09:16:58,325 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 09:16:58,325 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 09:16:58,326 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 09:16:58,326 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 09:16:58,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 09:16:58,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:16:58,327 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 09:16:58,327 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 09:16:58,327 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 09:16:58,328 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 09:16:58,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 09:16:58,329 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 09:16:58,329 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 09:16:58,329 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 09:16:58,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 09:16:58,330 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b [2024-11-18 09:16:58,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 09:16:58,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 09:16:58,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 09:16:58,589 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 09:16:58,590 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 09:16:58,591 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array12_pattern.c [2024-11-18 09:16:59,978 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 09:17:00,172 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 09:17:00,172 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array12_pattern.c [2024-11-18 09:17:00,180 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dd48d4e9/547dbc1b242a4d0489b7bb8e15e48bb5/FLAGf277e0f45 [2024-11-18 09:17:00,192 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dd48d4e9/547dbc1b242a4d0489b7bb8e15e48bb5 [2024-11-18 09:17:00,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 09:17:00,194 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 09:17:00,195 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 09:17:00,195 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 09:17:00,199 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 09:17:00,200 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,201 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60e77d4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00, skipping insertion in model container [2024-11-18 09:17:00,201 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,220 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 09:17:00,372 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2024-11-18 09:17:00,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:17:00,407 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 09:17:00,419 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2024-11-18 09:17:00,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:17:00,454 INFO L204 MainTranslator]: Completed translation [2024-11-18 09:17:00,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00 WrapperNode [2024-11-18 09:17:00,455 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 09:17:00,456 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 09:17:00,456 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 09:17:00,456 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 09:17:00,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,468 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,489 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2024-11-18 09:17:00,492 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 09:17:00,492 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 09:17:00,492 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 09:17:00,493 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 09:17:00,501 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,503 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,514 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-18 09:17:00,515 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,516 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,522 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,525 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,526 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,527 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,529 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 09:17:00,530 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 09:17:00,530 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 09:17:00,530 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 09:17:00,531 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (1/1) ... [2024-11-18 09:17:00,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:17:00,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:00,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 09:17:00,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 09:17:00,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 09:17:00,620 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-18 09:17:00,620 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-18 09:17:00,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 09:17:00,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 09:17:00,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 09:17:00,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 09:17:00,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 09:17:00,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 09:17:00,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 09:17:00,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 09:17:00,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 09:17:00,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 09:17:00,715 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 09:17:00,717 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 09:17:00,882 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-11-18 09:17:00,883 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 09:17:00,898 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 09:17:00,898 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-18 09:17:00,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:17:00 BoogieIcfgContainer [2024-11-18 09:17:00,899 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 09:17:00,901 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 09:17:00,901 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 09:17:00,905 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 09:17:00,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:17:00" (1/3) ... [2024-11-18 09:17:00,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79df37c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:17:00, skipping insertion in model container [2024-11-18 09:17:00,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:17:00" (2/3) ... [2024-11-18 09:17:00,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79df37c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:17:00, skipping insertion in model container [2024-11-18 09:17:00,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:17:00" (3/3) ... [2024-11-18 09:17:00,909 INFO L112 eAbstractionObserver]: Analyzing ICFG array12_pattern.c [2024-11-18 09:17:00,928 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 09:17:00,928 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 09:17:00,981 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 09:17:00,987 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;@71616f5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 09:17:00,988 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 09:17:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 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) [2024-11-18 09:17:00,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-18 09:17:00,999 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:00,999 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:01,000 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:01,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:01,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2136223091, now seen corresponding path program 1 times [2024-11-18 09:17:01,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:01,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111678375] [2024-11-18 09:17:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:01,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:17:01,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:01,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111678375] [2024-11-18 09:17:01,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111678375] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:17:01,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:17:01,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-18 09:17:01,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052718925] [2024-11-18 09:17:01,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:17:01,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 09:17:01,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:01,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 09:17:01,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 09:17:01,233 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 09:17:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:01,249 INFO L93 Difference]: Finished difference Result 57 states and 87 transitions. [2024-11-18 09:17:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 09:17:01,251 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-18 09:17:01,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:01,256 INFO L225 Difference]: With dead ends: 57 [2024-11-18 09:17:01,257 INFO L226 Difference]: Without dead ends: 26 [2024-11-18 09:17:01,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 09:17:01,262 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:01,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:17:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-18 09:17:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-18 09:17:01,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2024-11-18 09:17:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-11-18 09:17:01,299 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2024-11-18 09:17:01,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:01,300 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-11-18 09:17:01,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 09:17:01,300 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-11-18 09:17:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-18 09:17:01,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:01,303 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, 1] [2024-11-18 09:17:01,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 09:17:01,304 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:01,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:01,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1040942554, now seen corresponding path program 1 times [2024-11-18 09:17:01,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:01,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472011590] [2024-11-18 09:17:01,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:01,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 09:17:01,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:01,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472011590] [2024-11-18 09:17:01,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472011590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:01,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717931332] [2024-11-18 09:17:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:01,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:01,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:01,798 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:17:01,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 09:17:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:01,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-18 09:17:01,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 09:17:02,047 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 09:17:02,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717931332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:17:02,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 09:17:02,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-11-18 09:17:02,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709382490] [2024-11-18 09:17:02,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:17:02,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 09:17:02,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:02,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 09:17:02,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-18 09:17:02,056 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 09:17:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:02,149 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-11-18 09:17:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 09:17:02,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-18 09:17:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:02,151 INFO L225 Difference]: With dead ends: 62 [2024-11-18 09:17:02,151 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 09:17:02,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-18 09:17:02,153 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:02,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:17:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 09:17:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2024-11-18 09:17:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2024-11-18 09:17:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-11-18 09:17:02,159 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 27 [2024-11-18 09:17:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:02,160 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-11-18 09:17:02,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 09:17:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-11-18 09:17:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-18 09:17:02,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:02,162 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, 1, 1, 1, 1] [2024-11-18 09:17:02,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 09:17:02,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:02,367 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:02,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:02,368 INFO L85 PathProgramCache]: Analyzing trace with hash 634441968, now seen corresponding path program 1 times [2024-11-18 09:17:02,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:02,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377048621] [2024-11-18 09:17:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:02,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 09:17:02,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:02,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377048621] [2024-11-18 09:17:02,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377048621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:02,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261005656] [2024-11-18 09:17:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:02,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:02,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:02,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:17:02,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 09:17:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:02,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-18 09:17:02,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:17:02,657 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 09:17:02,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261005656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:17:02,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 09:17:02,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-18 09:17:02,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449116195] [2024-11-18 09:17:02,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:17:02,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 09:17:02,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:02,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 09:17:02,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-18 09:17:02,660 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2024-11-18 09:17:02,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:02,718 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2024-11-18 09:17:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 09:17:02,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 30 [2024-11-18 09:17:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:02,719 INFO L225 Difference]: With dead ends: 53 [2024-11-18 09:17:02,720 INFO L226 Difference]: Without dead ends: 31 [2024-11-18 09:17:02,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-18 09:17:02,721 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:02,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:17:02,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-18 09:17:02,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-11-18 09:17:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2024-11-18 09:17:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-11-18 09:17:02,726 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 30 [2024-11-18 09:17:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:02,727 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-18 09:17:02,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2024-11-18 09:17:02,727 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-11-18 09:17:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-18 09:17:02,728 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:02,728 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, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:02,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 09:17:02,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-18 09:17:02,929 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:02,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2067799314, now seen corresponding path program 1 times [2024-11-18 09:17:02,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:02,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989111557] [2024-11-18 09:17:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:02,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 09:17:03,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:17:03,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989111557] [2024-11-18 09:17:03,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989111557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:17:03,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449601426] [2024-11-18 09:17:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:03,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:03,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:03,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:17:03,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 09:17:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:03,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-18 09:17:03,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 09:17:03,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:17:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 09:17:03,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449601426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:17:03,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:17:03,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-18 09:17:03,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631567461] [2024-11-18 09:17:03,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:17:03,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 09:17:03,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:17:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 09:17:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-18 09:17:03,290 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:03,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:17:03,410 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-11-18 09:17:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 09:17:03,411 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-11-18 09:17:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:17:03,411 INFO L225 Difference]: With dead ends: 46 [2024-11-18 09:17:03,411 INFO L226 Difference]: Without dead ends: 42 [2024-11-18 09:17:03,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-18 09:17:03,413 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:17:03,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 81 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:17:03,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-18 09:17:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2024-11-18 09:17:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:17:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-11-18 09:17:03,426 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 32 [2024-11-18 09:17:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:17:03,426 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-11-18 09:17:03,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:17:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-11-18 09:17:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-18 09:17:03,428 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:17:03,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:17:03,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 09:17:03,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:03,629 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:17:03,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:17:03,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1831364287, now seen corresponding path program 1 times [2024-11-18 09:17:03,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:17:03,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176817688] [2024-11-18 09:17:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:03,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:17:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 09:17:03,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731280115] [2024-11-18 09:17:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:17:03,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:17:03,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:17:03,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:17:03,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 09:17:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:17:03,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-18 09:17:03,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:17:03,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 09:17:04,611 INFO L349 Elim1Store]: treesize reduction 156, result has 26.4 percent of original size [2024-11-18 09:17:04,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 77 [2024-11-18 09:17:06,536 INFO L349 Elim1Store]: treesize reduction 36, result has 71.0 percent of original size [2024-11-18 09:17:06,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 142 treesize of output 170 [2024-11-18 09:17:47,274 WARN L286 SmtUtils]: Spent 16.71s on a formula simplification that was a NOOP. DAG size: 134 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-18 09:18:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:18:31,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:18:33,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:18:33,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176817688] [2024-11-18 09:18:33,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 09:18:33,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731280115] [2024-11-18 09:18:33,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731280115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:18:33,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 09:18:33,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-18 09:18:33,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364307863] [2024-11-18 09:18:33,872 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 09:18:33,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-18 09:18:33,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:18:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-18 09:18:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2024-11-18 09:18:33,874 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:18:36,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:18:36,458 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2024-11-18 09:18:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-18 09:18:36,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2024-11-18 09:18:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:18:36,460 INFO L225 Difference]: With dead ends: 64 [2024-11-18 09:18:36,460 INFO L226 Difference]: Without dead ends: 60 [2024-11-18 09:18:36,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2024-11-18 09:18:36,461 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-18 09:18:36,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 133 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-18 09:18:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-18 09:18:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2024-11-18 09:18:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 09:18:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2024-11-18 09:18:36,487 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 37 [2024-11-18 09:18:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:18:36,488 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2024-11-18 09:18:36,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:18:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2024-11-18 09:18:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-18 09:18:36,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:18:36,489 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:18:36,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-18 09:18:36,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:18:36,690 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:18:36,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:18:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1155769123, now seen corresponding path program 2 times [2024-11-18 09:18:36,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:18:36,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472319585] [2024-11-18 09:18:36,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:18:36,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:18:36,705 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:18:36,706 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:18:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 09:18:36,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:18:36,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472319585] [2024-11-18 09:18:36,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472319585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:18:36,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395121677] [2024-11-18 09:18:36,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:18:36,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:18:36,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:18:36,787 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:18:36,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 09:18:36,852 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:18:36,852 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:18:36,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 09:18:36,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:18:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:18:36,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:18:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 09:18:36,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395121677] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:18:36,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:18:36,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-18 09:18:36,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952499807] [2024-11-18 09:18:36,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:18:36,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 09:18:36,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:18:36,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 09:18:36,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-18 09:18:36,983 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:18:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:18:37,147 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2024-11-18 09:18:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 09:18:37,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-11-18 09:18:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:18:37,150 INFO L225 Difference]: With dead ends: 134 [2024-11-18 09:18:37,150 INFO L226 Difference]: Without dead ends: 94 [2024-11-18 09:18:37,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-18 09:18:37,151 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:18:37,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:18:37,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-18 09:18:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2024-11-18 09:18:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 73 states have (on average 1.178082191780822) internal successors, (86), 73 states have internal predecessors, (86), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 09:18:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2024-11-18 09:18:37,206 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2024-11-18 09:18:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:18:37,206 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2024-11-18 09:18:37,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 09:18:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2024-11-18 09:18:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-18 09:18:37,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:18:37,208 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:18:37,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 09:18:37,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:18:37,409 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:18:37,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:18:37,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2076840219, now seen corresponding path program 3 times [2024-11-18 09:18:37,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:18:37,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937992069] [2024-11-18 09:18:37,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:18:37,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:18:37,432 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 09:18:37,433 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat