./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/heavy-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/heavy-1.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 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 01:56:13,565 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 01:56:13,603 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 01:56:13,606 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 01:56:13,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 01:56:13,622 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 01:56:13,622 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 01:56:13,623 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 01:56:13,623 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 01:56:13,623 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 01:56:13,640 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 01:56:13,640 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 01:56:13,640 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 01:56:13,641 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 01:56:13,641 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 01:56:13,641 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 01:56:13,642 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 01:56:13,642 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 01:56:13,642 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 01:56:13,642 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 01:56:13,643 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 01:56:13,643 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 01:56:13,643 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 01:56:13,644 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 01:56:13,644 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 01:56:13,644 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 01:56:13,644 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 01:56:13,644 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 01:56:13,645 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 01:56:13,645 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 01:56:13,645 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 01:56:13,645 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 01:56:13,646 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 01:56:13,646 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 01:56:13,646 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 01:56:13,646 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 01:56:13,647 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 01:56:13,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 01:56:13,647 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 01:56:13,647 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 01:56:13,647 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 01:56:13,648 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 01:56:13,648 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a [2024-10-14 01:56:13,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 01:56:13,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 01:56:13,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 01:56:13,910 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 01:56:13,910 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 01:56:13,911 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/heavy-1.c [2024-10-14 01:56:15,191 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 01:56:15,330 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 01:56:15,330 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/heavy-1.c [2024-10-14 01:56:15,337 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d850e213d/dcbaa8361e3d44f3a86a802e2b4f06cb/FLAG5713db1de [2024-10-14 01:56:15,352 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d850e213d/dcbaa8361e3d44f3a86a802e2b4f06cb [2024-10-14 01:56:15,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 01:56:15,355 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 01:56:15,358 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 01:56:15,358 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 01:56:15,362 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 01:56:15,363 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,365 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b60a9ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15, skipping insertion in model container [2024-10-14 01:56:15,365 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,381 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 01:56:15,533 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/loops/heavy-1.c[600,613] [2024-10-14 01:56:15,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 01:56:15,597 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 01:56:15,614 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/loops/heavy-1.c[600,613] [2024-10-14 01:56:15,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 01:56:15,676 INFO L204 MainTranslator]: Completed translation [2024-10-14 01:56:15,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15 WrapperNode [2024-10-14 01:56:15,679 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 01:56:15,680 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 01:56:15,680 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 01:56:15,681 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 01:56:15,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,692 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,709 INFO L138 Inliner]: procedures = 12, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 57 [2024-10-14 01:56:15,710 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 01:56:15,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 01:56:15,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 01:56:15,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 01:56:15,728 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,730 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,741 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 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]. [2024-10-14 01:56:15,742 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,742 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,745 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,750 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,755 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 01:56:15,756 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 01:56:15,759 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 01:56:15,759 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 01:56:15,760 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (1/1) ... [2024-10-14 01:56:15,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 01:56:15,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:56:15,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 01:56:15,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 01:56:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 01:56:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 01:56:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 01:56:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 01:56:15,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 01:56:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 01:56:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 01:56:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 01:56:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 01:56:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-10-14 01:56:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-10-14 01:56:15,937 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 01:56:15,939 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 01:56:16,056 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-10-14 01:56:16,056 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 01:56:16,077 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 01:56:16,078 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 01:56:16,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:56:16 BoogieIcfgContainer [2024-10-14 01:56:16,078 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 01:56:16,080 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 01:56:16,080 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 01:56:16,083 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 01:56:16,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 01:56:15" (1/3) ... [2024-10-14 01:56:16,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffaa9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 01:56:16, skipping insertion in model container [2024-10-14 01:56:16,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:56:15" (2/3) ... [2024-10-14 01:56:16,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffaa9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 01:56:16, skipping insertion in model container [2024-10-14 01:56:16,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:56:16" (3/3) ... [2024-10-14 01:56:16,085 INFO L112 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2024-10-14 01:56:16,098 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 01:56:16,099 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 01:56:16,138 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 01:56:16,144 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;@289bec6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 01:56:16,144 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 01:56:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-14 01:56:16,151 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:16,152 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-14 01:56:16,152 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:16,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2480728, now seen corresponding path program 1 times [2024-10-14 01:56:16,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:16,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470045218] [2024-10-14 01:56:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:16,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:56:16,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:16,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470045218] [2024-10-14 01:56:16,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470045218] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:56:16,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 01:56:16,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 01:56:16,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124426585] [2024-10-14 01:56:16,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:56:16,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 01:56:16,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:16,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 01:56:16,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 01:56:16,331 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:16,359 INFO L93 Difference]: Finished difference Result 21 states and 33 transitions. [2024-10-14 01:56:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 01:56:16,362 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-14 01:56:16,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:16,368 INFO L225 Difference]: With dead ends: 21 [2024-10-14 01:56:16,369 INFO L226 Difference]: Without dead ends: 9 [2024-10-14 01:56:16,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 01:56:16,375 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:16,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 01:56:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-10-14 01:56:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-10-14 01:56:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2024-10-14 01:56:16,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 4 [2024-10-14 01:56:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:16,400 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2024-10-14 01:56:16,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2024-10-14 01:56:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-14 01:56:16,401 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:16,401 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-14 01:56:16,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 01:56:16,405 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:16,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:16,406 INFO L85 PathProgramCache]: Analyzing trace with hash 2451898, now seen corresponding path program 1 times [2024-10-14 01:56:16,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:16,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869635460] [2024-10-14 01:56:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:16,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:56:16,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:16,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869635460] [2024-10-14 01:56:16,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869635460] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:56:16,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 01:56:16,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 01:56:16,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675863760] [2024-10-14 01:56:16,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:56:16,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 01:56:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 01:56:16,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 01:56:16,517 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:16,535 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2024-10-14 01:56:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 01:56:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-14 01:56:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:16,536 INFO L225 Difference]: With dead ends: 17 [2024-10-14 01:56:16,536 INFO L226 Difference]: Without dead ends: 14 [2024-10-14 01:56:16,536 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 01:56:16,537 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:16,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 01:56:16,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-10-14 01:56:16,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2024-10-14 01:56:16,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2024-10-14 01:56:16,542 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 4 [2024-10-14 01:56:16,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:16,542 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2024-10-14 01:56:16,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2024-10-14 01:56:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-14 01:56:16,543 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:16,543 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:56:16,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 01:56:16,543 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:16,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:16,544 INFO L85 PathProgramCache]: Analyzing trace with hash 63007168, now seen corresponding path program 1 times [2024-10-14 01:56:16,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:16,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947906859] [2024-10-14 01:56:16,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:16,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:56:16,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:16,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947906859] [2024-10-14 01:56:16,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947906859] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:56:16,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 01:56:16,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 01:56:16,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866337900] [2024-10-14 01:56:16,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:56:16,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 01:56:16,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:16,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 01:56:16,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 01:56:16,606 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:16,623 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2024-10-14 01:56:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 01:56:16,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-14 01:56:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:16,627 INFO L225 Difference]: With dead ends: 21 [2024-10-14 01:56:16,627 INFO L226 Difference]: Without dead ends: 13 [2024-10-14 01:56:16,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 01:56:16,628 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:16,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 01:56:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-10-14 01:56:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2024-10-14 01:56:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2024-10-14 01:56:16,637 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2024-10-14 01:56:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:16,637 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2024-10-14 01:56:16,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,638 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2024-10-14 01:56:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-14 01:56:16,638 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:16,639 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:56:16,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 01:56:16,639 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:16,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2060823466, now seen corresponding path program 1 times [2024-10-14 01:56:16,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:16,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343528800] [2024-10-14 01:56:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:16,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:56:16,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:16,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343528800] [2024-10-14 01:56:16,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343528800] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:56:16,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 01:56:16,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 01:56:16,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891718139] [2024-10-14 01:56:16,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:56:16,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 01:56:16,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 01:56:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 01:56:16,694 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:16,703 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2024-10-14 01:56:16,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 01:56:16,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-14 01:56:16,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:16,704 INFO L225 Difference]: With dead ends: 21 [2024-10-14 01:56:16,705 INFO L226 Difference]: Without dead ends: 12 [2024-10-14 01:56:16,705 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 01:56:16,706 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:16,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 01:56:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-10-14 01:56:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-10-14 01:56:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-10-14 01:56:16,709 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2024-10-14 01:56:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:16,709 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-10-14 01:56:16,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:16,710 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-10-14 01:56:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 01:56:16,710 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:16,710 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:56:16,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 01:56:16,710 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:16,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:16,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1471176693, now seen corresponding path program 1 times [2024-10-14 01:56:16,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:16,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736362980] [2024-10-14 01:56:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:16,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:56:16,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:16,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736362980] [2024-10-14 01:56:16,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736362980] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:56:16,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873367235] [2024-10-14 01:56:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:16,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:16,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:56:16,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:56:16,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 01:56:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:16,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 01:56:16,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:56:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 01:56:17,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:56:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 01:56:17,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873367235] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:56:17,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:56:17,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2024-10-14 01:56:17,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134733650] [2024-10-14 01:56:17,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:56:17,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 01:56:17,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:17,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 01:56:17,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-10-14 01:56:17,053 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:17,186 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2024-10-14 01:56:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 01:56:17,186 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-14 01:56:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:17,187 INFO L225 Difference]: With dead ends: 47 [2024-10-14 01:56:17,188 INFO L226 Difference]: Without dead ends: 37 [2024-10-14 01:56:17,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2024-10-14 01:56:17,190 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:17,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 01:56:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-14 01:56:17,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-14 01:56:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-10-14 01:56:17,204 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 11 [2024-10-14 01:56:17,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:17,204 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-10-14 01:56:17,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:17,205 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-10-14 01:56:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-14 01:56:17,205 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:17,206 INFO L215 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2024-10-14 01:56:17,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 01:56:17,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:17,410 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:17,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:17,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1700955222, now seen corresponding path program 2 times [2024-10-14 01:56:17,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:17,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5050156] [2024-10-14 01:56:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:17,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-14 01:56:17,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:17,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5050156] [2024-10-14 01:56:17,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5050156] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:56:17,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17310238] [2024-10-14 01:56:17,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 01:56:17,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:17,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:56:17,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:56:17,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 01:56:17,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 01:56:17,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:56:17,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 01:56:17,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:56:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-14 01:56:17,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:56:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 71 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-14 01:56:17,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17310238] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:56:17,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:56:17,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 15 [2024-10-14 01:56:17,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332300856] [2024-10-14 01:56:17,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:56:17,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 01:56:17,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:17,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 01:56:17,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-10-14 01:56:17,946 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:18,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:18,330 INFO L93 Difference]: Finished difference Result 129 states and 178 transitions. [2024-10-14 01:56:18,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-14 01:56:18,331 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-14 01:56:18,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:18,333 INFO L225 Difference]: With dead ends: 129 [2024-10-14 01:56:18,334 INFO L226 Difference]: Without dead ends: 78 [2024-10-14 01:56:18,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-10-14 01:56:18,336 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:18,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 95 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 01:56:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-14 01:56:18,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-10-14 01:56:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 77 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2024-10-14 01:56:18,360 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 36 [2024-10-14 01:56:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:18,360 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2024-10-14 01:56:18,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2024-10-14 01:56:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-14 01:56:18,361 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:18,361 INFO L215 NwaCegarLoop]: trace histogram [18, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2024-10-14 01:56:18,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 01:56:18,562 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,SelfDestructingSolverStorable5 [2024-10-14 01:56:18,563 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:18,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash 159773842, now seen corresponding path program 3 times [2024-10-14 01:56:18,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:18,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041769073] [2024-10-14 01:56:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:18,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-10-14 01:56:18,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:18,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041769073] [2024-10-14 01:56:18,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041769073] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:56:18,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114783492] [2024-10-14 01:56:18,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 01:56:18,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:18,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:56:18,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:56:18,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 01:56:19,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-14 01:56:19,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:56:19,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 01:56:19,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:56:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 73 proven. 80 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-10-14 01:56:19,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:56:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 89 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-10-14 01:56:19,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114783492] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:56:19,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:56:19,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 13 [2024-10-14 01:56:19,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787328855] [2024-10-14 01:56:19,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:56:19,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 01:56:19,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:19,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 01:56:19,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2024-10-14 01:56:19,114 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:19,226 INFO L93 Difference]: Finished difference Result 148 states and 203 transitions. [2024-10-14 01:56:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 01:56:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-10-14 01:56:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:19,227 INFO L225 Difference]: With dead ends: 148 [2024-10-14 01:56:19,227 INFO L226 Difference]: Without dead ends: 73 [2024-10-14 01:56:19,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-10-14 01:56:19,228 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:19,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 01:56:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-14 01:56:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-10-14 01:56:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.125) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:19,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2024-10-14 01:56:19,243 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 46 [2024-10-14 01:56:19,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:19,243 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2024-10-14 01:56:19,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2024-10-14 01:56:19,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-14 01:56:19,245 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:19,245 INFO L215 NwaCegarLoop]: trace histogram [44, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2024-10-14 01:56:19,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 01:56:19,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:19,446 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:19,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:19,446 INFO L85 PathProgramCache]: Analyzing trace with hash 321221754, now seen corresponding path program 4 times [2024-10-14 01:56:19,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:19,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555689690] [2024-10-14 01:56:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:19,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 443 proven. 66 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2024-10-14 01:56:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555689690] [2024-10-14 01:56:20,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555689690] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:56:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769975793] [2024-10-14 01:56:20,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 01:56:20,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:20,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:56:20,190 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:56:20,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 01:56:20,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 01:56:20,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:56:20,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 01:56:20,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:56:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 0 proven. 955 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-10-14 01:56:20,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:56:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 35 proven. 920 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-10-14 01:56:21,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769975793] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:56:21,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:56:21,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 34 [2024-10-14 01:56:21,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683612987] [2024-10-14 01:56:21,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:56:21,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-14 01:56:21,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:21,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-14 01:56:21,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 01:56:21,028 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:25,205 INFO L93 Difference]: Finished difference Result 255 states and 299 transitions. [2024-10-14 01:56:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-10-14 01:56:25,205 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-10-14 01:56:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:25,206 INFO L225 Difference]: With dead ends: 255 [2024-10-14 01:56:25,207 INFO L226 Difference]: Without dead ends: 185 [2024-10-14 01:56:25,213 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8035 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2819, Invalid=20437, Unknown=0, NotChecked=0, Total=23256 [2024-10-14 01:56:25,213 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:25,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 299 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-14 01:56:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-10-14 01:56:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2024-10-14 01:56:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1141304347826086) internal successors, (205), 184 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:25,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 205 transitions. [2024-10-14 01:56:25,254 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 205 transitions. Word has length 72 [2024-10-14 01:56:25,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:25,254 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 205 transitions. [2024-10-14 01:56:25,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:25,254 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 205 transitions. [2024-10-14 01:56:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-10-14 01:56:25,256 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:25,256 INFO L215 NwaCegarLoop]: trace histogram [120, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2024-10-14 01:56:25,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 01:56:25,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:25,457 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:25,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:25,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1193780910, now seen corresponding path program 5 times [2024-10-14 01:56:25,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:25,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195434291] [2024-10-14 01:56:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:25,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8720 backedges. 1550 proven. 78 refuted. 0 times theorem prover too weak. 7092 trivial. 0 not checked. [2024-10-14 01:56:27,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:27,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195434291] [2024-10-14 01:56:27,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195434291] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:56:27,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270901494] [2024-10-14 01:56:27,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 01:56:27,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:27,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:56:27,265 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:56:27,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 01:56:44,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-10-14 01:56:44,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:56:44,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-14 01:56:44,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:56:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8720 backedges. 4018 proven. 78 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2024-10-14 01:56:44,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:56:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8720 backedges. 4018 proven. 78 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2024-10-14 01:56:44,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270901494] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:56:44,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:56:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-10-14 01:56:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088791697] [2024-10-14 01:56:44,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:56:44,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-14 01:56:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:56:44,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-14 01:56:44,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2024-10-14 01:56:44,713 INFO L87 Difference]: Start difference. First operand 185 states and 205 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:56:49,500 INFO L93 Difference]: Finished difference Result 507 states and 687 transitions. [2024-10-14 01:56:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 01:56:49,500 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2024-10-14 01:56:49,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:56:49,502 INFO L225 Difference]: With dead ends: 507 [2024-10-14 01:56:49,502 INFO L226 Difference]: Without dead ends: 325 [2024-10-14 01:56:49,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=598, Invalid=1042, Unknown=0, NotChecked=0, Total=1640 [2024-10-14 01:56:49,504 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:56:49,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:56:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-10-14 01:56:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2024-10-14 01:56:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.0648148148148149) internal successors, (345), 324 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 345 transitions. [2024-10-14 01:56:49,534 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 345 transitions. Word has length 184 [2024-10-14 01:56:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:56:49,534 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 345 transitions. [2024-10-14 01:56:49,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:56:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 345 transitions. [2024-10-14 01:56:49,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2024-10-14 01:56:49,537 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:56:49,537 INFO L215 NwaCegarLoop]: trace histogram [260, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2024-10-14 01:56:49,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 01:56:49,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:49,738 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:56:49,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:56:49,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1050829934, now seen corresponding path program 6 times [2024-10-14 01:56:49,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:56:49,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785576446] [2024-10-14 01:56:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:56:49,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:56:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:56:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36650 backedges. 6590 proven. 351 refuted. 0 times theorem prover too weak. 29709 trivial. 0 not checked. [2024-10-14 01:56:55,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:56:55,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785576446] [2024-10-14 01:56:55,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785576446] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:56:55,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66798448] [2024-10-14 01:56:55,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 01:56:55,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:56:55,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:56:55,184 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:56:55,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process