./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.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 aefc568e9b7c922872a103ac050823e614044aea4bac2f22f2c586f3247176b4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 02:27:18,670 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 02:27:18,745 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 02:27:18,751 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 02:27:18,752 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 02:27:18,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 02:27:18,785 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 02:27:18,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 02:27:18,786 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 02:27:18,787 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 02:27:18,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 02:27:18,787 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 02:27:18,788 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 02:27:18,788 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 02:27:18,789 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 02:27:18,789 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 02:27:18,789 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 02:27:18,790 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 02:27:18,790 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 02:27:18,791 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 02:27:18,791 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 02:27:18,794 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 02:27:18,795 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 02:27:18,795 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 02:27:18,795 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 02:27:18,795 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 02:27:18,795 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 02:27:18,796 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 02:27:18,796 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 02:27:18,796 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 02:27:18,796 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 02:27:18,797 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 02:27:18,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:27:18,798 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 02:27:18,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 02:27:18,799 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 02:27:18,799 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 02:27:18,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 02:27:18,800 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 02:27:18,800 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 02:27:18,800 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 02:27:18,800 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 02:27:18,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aefc568e9b7c922872a103ac050823e614044aea4bac2f22f2c586f3247176b4 [2024-10-14 02:27:19,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 02:27:19,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 02:27:19,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 02:27:19,054 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 02:27:19,055 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 02:27:19,056 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c [2024-10-14 02:27:20,460 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 02:27:20,628 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 02:27:20,629 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c [2024-10-14 02:27:20,635 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae4368ab/94a7eef0e3b7403cbcb4d62979d757ba/FLAGfc5b2584f [2024-10-14 02:27:21,043 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae4368ab/94a7eef0e3b7403cbcb4d62979d757ba [2024-10-14 02:27:21,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 02:27:21,046 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 02:27:21,049 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 02:27:21,049 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 02:27:21,054 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 02:27:21,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e2969eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21, skipping insertion in model container [2024-10-14 02:27:21,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,077 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 02:27:21,223 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c[538,551] [2024-10-14 02:27:21,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:27:21,263 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 02:27:21,274 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c[538,551] [2024-10-14 02:27:21,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:27:21,308 INFO L204 MainTranslator]: Completed translation [2024-10-14 02:27:21,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21 WrapperNode [2024-10-14 02:27:21,309 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 02:27:21,310 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 02:27:21,310 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 02:27:21,310 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 02:27:21,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,327 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,353 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-10-14 02:27:21,353 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 02:27:21,354 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 02:27:21,354 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 02:27:21,354 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 02:27:21,365 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,367 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,378 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-14 02:27:21,382 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,382 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,385 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,394 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,395 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 02:27:21,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 02:27:21,397 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 02:27:21,397 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 02:27:21,398 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (1/1) ... [2024-10-14 02:27:21,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:27:21,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:21,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 02:27:21,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 02:27:21,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 02:27:21,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 02:27:21,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 02:27:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 02:27:21,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-14 02:27:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-14 02:27:21,549 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 02:27:21,551 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 02:27:21,785 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-10-14 02:27:21,785 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 02:27:21,839 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 02:27:21,843 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 02:27:21,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:27:21 BoogieIcfgContainer [2024-10-14 02:27:21,844 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 02:27:21,846 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 02:27:21,849 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 02:27:21,854 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 02:27:21,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:27:21" (1/3) ... [2024-10-14 02:27:21,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec9eb5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:27:21, skipping insertion in model container [2024-10-14 02:27:21,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:27:21" (2/3) ... [2024-10-14 02:27:21,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec9eb5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:27:21, skipping insertion in model container [2024-10-14 02:27:21,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:27:21" (3/3) ... [2024-10-14 02:27:21,858 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound50.c [2024-10-14 02:27:21,874 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 02:27:21,874 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 02:27:21,931 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 02:27:21,940 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;@3d07d6e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 02:27:21,943 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 02:27:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-14 02:27:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 02:27:21,955 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:21,955 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:21,956 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:21,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:21,962 INFO L85 PathProgramCache]: Analyzing trace with hash 65649153, now seen corresponding path program 1 times [2024-10-14 02:27:21,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:21,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024608296] [2024-10-14 02:27:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:21,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 02:27:22,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:22,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024608296] [2024-10-14 02:27:22,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024608296] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:27:22,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:27:22,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 02:27:22,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005307711] [2024-10-14 02:27:22,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:27:22,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 02:27:22,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:22,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 02:27:22,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 02:27:22,143 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 02:27:22,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:22,173 INFO L93 Difference]: Finished difference Result 48 states and 82 transitions. [2024-10-14 02:27:22,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 02:27:22,177 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-14 02:27:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:22,183 INFO L225 Difference]: With dead ends: 48 [2024-10-14 02:27:22,184 INFO L226 Difference]: Without dead ends: 23 [2024-10-14 02:27:22,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 02:27:22,192 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:22,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:27:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-14 02:27:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-14 02:27:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 02:27:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2024-10-14 02:27:22,236 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 9 [2024-10-14 02:27:22,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:22,237 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2024-10-14 02:27:22,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 02:27:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2024-10-14 02:27:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 02:27:22,239 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:22,239 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:22,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 02:27:22,240 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:22,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:22,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1205755883, now seen corresponding path program 1 times [2024-10-14 02:27:22,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:22,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131171418] [2024-10-14 02:27:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:22,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 02:27:22,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:22,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131171418] [2024-10-14 02:27:22,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131171418] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:27:22,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:27:22,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:27:22,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282230441] [2024-10-14 02:27:22,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:27:22,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:27:22,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:22,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:27:22,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:27:22,447 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 02:27:22,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:22,523 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2024-10-14 02:27:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:27:22,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-14 02:27:22,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:22,526 INFO L225 Difference]: With dead ends: 37 [2024-10-14 02:27:22,526 INFO L226 Difference]: Without dead ends: 35 [2024-10-14 02:27:22,527 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:27:22,529 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:22,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:27:22,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-14 02:27:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2024-10-14 02:27:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 02:27:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-10-14 02:27:22,547 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2024-10-14 02:27:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:22,547 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-10-14 02:27:22,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 02:27:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-10-14 02:27:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 02:27:22,548 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:22,548 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:22,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 02:27:22,548 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:22,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:22,549 INFO L85 PathProgramCache]: Analyzing trace with hash -2004332404, now seen corresponding path program 1 times [2024-10-14 02:27:22,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:22,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737056427] [2024-10-14 02:27:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:22,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 02:27:22,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:22,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737056427] [2024-10-14 02:27:22,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737056427] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:27:22,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:27:22,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 02:27:22,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484684256] [2024-10-14 02:27:22,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:27:22,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 02:27:22,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:22,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 02:27:22,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 02:27:22,647 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 02:27:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:22,674 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2024-10-14 02:27:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 02:27:22,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-14 02:27:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:22,676 INFO L225 Difference]: With dead ends: 43 [2024-10-14 02:27:22,676 INFO L226 Difference]: Without dead ends: 29 [2024-10-14 02:27:22,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 02:27:22,680 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:22,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:27:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-14 02:27:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-14 02:27:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 02:27:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2024-10-14 02:27:22,688 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2024-10-14 02:27:22,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:22,689 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2024-10-14 02:27:22,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 02:27:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2024-10-14 02:27:22,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 02:27:22,690 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:22,690 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:22,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 02:27:22,690 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:22,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:22,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1962237034, now seen corresponding path program 1 times [2024-10-14 02:27:22,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:22,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647647139] [2024-10-14 02:27:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:22,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:22,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 02:27:22,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:22,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647647139] [2024-10-14 02:27:22,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647647139] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:27:22,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:27:22,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:27:22,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128189666] [2024-10-14 02:27:22,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:27:22,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:27:22,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:22,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:27:22,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:27:22,793 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 02:27:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:22,868 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2024-10-14 02:27:22,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:27:22,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-10-14 02:27:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:22,870 INFO L225 Difference]: With dead ends: 43 [2024-10-14 02:27:22,870 INFO L226 Difference]: Without dead ends: 41 [2024-10-14 02:27:22,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:27:22,871 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:22,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:27:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-14 02:27:22,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2024-10-14 02:27:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 02:27:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-10-14 02:27:22,885 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 14 [2024-10-14 02:27:22,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:22,885 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-10-14 02:27:22,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 02:27:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-10-14 02:27:22,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-14 02:27:22,886 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:22,886 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:22,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 02:27:22,887 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:22,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash 608183541, now seen corresponding path program 1 times [2024-10-14 02:27:22,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:22,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516299261] [2024-10-14 02:27:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:22,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:27:22,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274534852] [2024-10-14 02:27:22,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:22,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:22,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:22,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:22,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 02:27:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:22,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:27:22,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:27:23,097 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:27:23,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:23,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516299261] [2024-10-14 02:27:23,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:27:23,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274534852] [2024-10-14 02:27:23,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274534852] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:27:23,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:27:23,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:27:23,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642834334] [2024-10-14 02:27:23,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:27:23,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:27:23,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:23,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:27:23,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:27:23,102 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 02:27:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:23,202 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2024-10-14 02:27:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:27:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-10-14 02:27:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:23,203 INFO L225 Difference]: With dead ends: 62 [2024-10-14 02:27:23,204 INFO L226 Difference]: Without dead ends: 47 [2024-10-14 02:27:23,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:27:23,205 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:23,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 98 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:27:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-14 02:27:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-10-14 02:27:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-14 02:27:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2024-10-14 02:27:23,224 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 19 [2024-10-14 02:27:23,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:23,224 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2024-10-14 02:27:23,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 02:27:23,227 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2024-10-14 02:27:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 02:27:23,230 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:23,230 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:23,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 02:27:23,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:23,432 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:23,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash 560729168, now seen corresponding path program 1 times [2024-10-14 02:27:23,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:23,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876511654] [2024-10-14 02:27:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:23,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:23,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:23,553 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:23,558 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 02:27:23,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:23,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876511654] [2024-10-14 02:27:23,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876511654] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:27:23,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:27:23,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 02:27:23,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237948220] [2024-10-14 02:27:23,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:27:23,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 02:27:23,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:23,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 02:27:23,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:27:23,571 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 02:27:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:23,632 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-10-14 02:27:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 02:27:23,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2024-10-14 02:27:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:23,634 INFO L225 Difference]: With dead ends: 66 [2024-10-14 02:27:23,634 INFO L226 Difference]: Without dead ends: 59 [2024-10-14 02:27:23,635 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:27:23,636 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:23,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 94 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:27:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-14 02:27:23,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-10-14 02:27:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-14 02:27:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-10-14 02:27:23,651 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 27 [2024-10-14 02:27:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:23,652 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-10-14 02:27:23,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 02:27:23,652 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-10-14 02:27:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 02:27:23,653 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:23,653 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:23,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 02:27:23,653 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:23,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash 562457046, now seen corresponding path program 1 times [2024-10-14 02:27:23,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:23,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547112007] [2024-10-14 02:27:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:23,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:27:23,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776016597] [2024-10-14 02:27:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:23,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:23,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:23,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:23,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 02:27:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:23,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:27:23,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 02:27:23,824 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:27:23,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:23,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547112007] [2024-10-14 02:27:23,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:27:23,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776016597] [2024-10-14 02:27:23,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776016597] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:27:23,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:27:23,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:27:23,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339166351] [2024-10-14 02:27:23,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:27:23,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:27:23,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:27:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:27:23,828 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 02:27:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:23,908 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2024-10-14 02:27:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:27:23,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2024-10-14 02:27:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:23,912 INFO L225 Difference]: With dead ends: 72 [2024-10-14 02:27:23,912 INFO L226 Difference]: Without dead ends: 70 [2024-10-14 02:27:23,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:27:23,913 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:23,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 78 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:27:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-14 02:27:23,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-10-14 02:27:23,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 47 states have internal predecessors, (55), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-14 02:27:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2024-10-14 02:27:23,946 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 27 [2024-10-14 02:27:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:23,947 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2024-10-14 02:27:23,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 02:27:23,947 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2024-10-14 02:27:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-14 02:27:23,948 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:23,948 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:23,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-14 02:27:24,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-14 02:27:24,149 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:24,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash 976926058, now seen corresponding path program 1 times [2024-10-14 02:27:24,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:24,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209141047] [2024-10-14 02:27:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:24,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:24,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:24,226 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:24,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:24,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-14 02:27:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-14 02:27:24,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:24,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209141047] [2024-10-14 02:27:24,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209141047] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:24,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805633887] [2024-10-14 02:27:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:24,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:24,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:24,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:24,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 02:27:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:24,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 02:27:24,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-14 02:27:24,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-14 02:27:24,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805633887] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:24,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:27:24,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-10-14 02:27:24,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862157490] [2024-10-14 02:27:24,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:24,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 02:27:24,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:24,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 02:27:24,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-14 02:27:24,447 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-14 02:27:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:24,602 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2024-10-14 02:27:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 02:27:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 34 [2024-10-14 02:27:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:24,605 INFO L225 Difference]: With dead ends: 156 [2024-10-14 02:27:24,605 INFO L226 Difference]: Without dead ends: 131 [2024-10-14 02:27:24,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-14 02:27:24,606 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:24,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 154 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:27:24,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-14 02:27:24,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2024-10-14 02:27:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 80 states have (on average 1.2) internal successors, (96), 84 states have internal predecessors, (96), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-14 02:27:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2024-10-14 02:27:24,629 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 34 [2024-10-14 02:27:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:24,630 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2024-10-14 02:27:24,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-14 02:27:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2024-10-14 02:27:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-14 02:27:24,631 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:24,631 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:24,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 02:27:24,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:24,832 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:24,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1560293058, now seen corresponding path program 1 times [2024-10-14 02:27:24,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:24,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795004332] [2024-10-14 02:27:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:24,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:27:24,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81706604] [2024-10-14 02:27:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:24,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:24,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:24,857 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:24,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 02:27:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:24,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 02:27:24,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-14 02:27:25,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-14 02:27:25,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:25,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795004332] [2024-10-14 02:27:25,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:27:25,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81706604] [2024-10-14 02:27:25,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81706604] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:25,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 02:27:25,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-14 02:27:25,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413151826] [2024-10-14 02:27:25,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:27:25,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:27:25,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:25,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:27:25,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 02:27:25,102 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 02:27:25,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:25,206 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2024-10-14 02:27:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:27:25,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2024-10-14 02:27:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:25,208 INFO L225 Difference]: With dead ends: 147 [2024-10-14 02:27:25,208 INFO L226 Difference]: Without dead ends: 141 [2024-10-14 02:27:25,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-14 02:27:25,209 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:25,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:27:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-14 02:27:25,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2024-10-14 02:27:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 91 states have internal predecessors, (102), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-10-14 02:27:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2024-10-14 02:27:25,240 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 37 [2024-10-14 02:27:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:25,241 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2024-10-14 02:27:25,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 02:27:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2024-10-14 02:27:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-14 02:27:25,242 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:25,242 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:25,260 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 02:27:25,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:25,447 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:25,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:25,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1166816529, now seen corresponding path program 1 times [2024-10-14 02:27:25,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:25,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250190077] [2024-10-14 02:27:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:25,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,552 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,557 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,574 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,580 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-14 02:27:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-14 02:27:25,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250190077] [2024-10-14 02:27:25,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250190077] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:27:25,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:27:25,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:27:25,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254501155] [2024-10-14 02:27:25,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:27:25,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:27:25,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:25,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:27:25,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:27:25,592 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-14 02:27:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:25,663 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2024-10-14 02:27:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:27:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2024-10-14 02:27:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:25,664 INFO L225 Difference]: With dead ends: 138 [2024-10-14 02:27:25,664 INFO L226 Difference]: Without dead ends: 119 [2024-10-14 02:27:25,665 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:27:25,665 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:25,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:27:25,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-10-14 02:27:25,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-10-14 02:27:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-10-14 02:27:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2024-10-14 02:27:25,693 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 43 [2024-10-14 02:27:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:25,694 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2024-10-14 02:27:25,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-14 02:27:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2024-10-14 02:27:25,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-14 02:27:25,699 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:25,699 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:25,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 02:27:25,699 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:25,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:25,700 INFO L85 PathProgramCache]: Analyzing trace with hash 367273510, now seen corresponding path program 1 times [2024-10-14 02:27:25,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:25,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974812717] [2024-10-14 02:27:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:25,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-14 02:27:25,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:25,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974812717] [2024-10-14 02:27:25,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974812717] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:25,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247508872] [2024-10-14 02:27:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:25,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:25,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:25,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:25,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 02:27:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:25,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:27:25,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-14 02:27:25,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-14 02:27:26,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247508872] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:26,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:27:26,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-10-14 02:27:26,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281543551] [2024-10-14 02:27:26,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:26,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 02:27:26,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:26,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 02:27:26,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-14 02:27:26,044 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-10-14 02:27:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:26,248 INFO L93 Difference]: Finished difference Result 242 states and 295 transitions. [2024-10-14 02:27:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 02:27:26,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 50 [2024-10-14 02:27:26,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:26,251 INFO L225 Difference]: With dead ends: 242 [2024-10-14 02:27:26,251 INFO L226 Difference]: Without dead ends: 221 [2024-10-14 02:27:26,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-10-14 02:27:26,253 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:26,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 162 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:27:26,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-10-14 02:27:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2024-10-14 02:27:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 148 states have internal predecessors, (166), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-10-14 02:27:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 260 transitions. [2024-10-14 02:27:26,292 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 260 transitions. Word has length 50 [2024-10-14 02:27:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:26,292 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 260 transitions. [2024-10-14 02:27:26,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-10-14 02:27:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 260 transitions. [2024-10-14 02:27:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-14 02:27:26,294 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:26,294 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:26,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 02:27:26,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-14 02:27:26,495 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:26,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash -293585845, now seen corresponding path program 1 times [2024-10-14 02:27:26,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:26,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003056002] [2024-10-14 02:27:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:26,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:27:26,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208889705] [2024-10-14 02:27:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:26,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:26,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:26,534 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:26,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 02:27:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:26,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 02:27:26,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-14 02:27:27,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-14 02:27:29,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:29,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003056002] [2024-10-14 02:27:29,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:27:29,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208889705] [2024-10-14 02:27:29,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208889705] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:29,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:27:29,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-10-14 02:27:29,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405967453] [2024-10-14 02:27:29,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:29,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 02:27:29,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:29,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 02:27:29,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-10-14 02:27:29,612 INFO L87 Difference]: Start difference. First operand 214 states and 260 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2024-10-14 02:27:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:31,060 INFO L93 Difference]: Finished difference Result 373 states and 476 transitions. [2024-10-14 02:27:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 02:27:31,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 59 [2024-10-14 02:27:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:31,063 INFO L225 Difference]: With dead ends: 373 [2024-10-14 02:27:31,063 INFO L226 Difference]: Without dead ends: 297 [2024-10-14 02:27:31,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2024-10-14 02:27:31,069 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:31,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 369 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-14 02:27:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-10-14 02:27:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 258. [2024-10-14 02:27:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 173 states have (on average 1.1849710982658959) internal successors, (205), 184 states have internal predecessors, (205), 53 states have call successors, (53), 31 states have call predecessors, (53), 31 states have return successors, (50), 42 states have call predecessors, (50), 50 states have call successors, (50) [2024-10-14 02:27:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 308 transitions. [2024-10-14 02:27:31,125 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 308 transitions. Word has length 59 [2024-10-14 02:27:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:31,127 INFO L471 AbstractCegarLoop]: Abstraction has 258 states and 308 transitions. [2024-10-14 02:27:31,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2024-10-14 02:27:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 308 transitions. [2024-10-14 02:27:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-14 02:27:31,128 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:31,128 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:31,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 02:27:31,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:31,329 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:31,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:31,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721499, now seen corresponding path program 1 times [2024-10-14 02:27:31,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:31,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815186627] [2024-10-14 02:27:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:31,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:27:31,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756787183] [2024-10-14 02:27:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:31,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:31,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:31,354 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:31,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 02:27:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:31,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 02:27:31,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-14 02:27:31,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-14 02:27:32,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:32,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815186627] [2024-10-14 02:27:32,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:27:32,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756787183] [2024-10-14 02:27:32,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756787183] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:32,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:27:32,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-10-14 02:27:32,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965086766] [2024-10-14 02:27:32,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:32,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 02:27:32,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:32,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 02:27:32,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-10-14 02:27:32,686 INFO L87 Difference]: Start difference. First operand 258 states and 308 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2024-10-14 02:27:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:33,211 INFO L93 Difference]: Finished difference Result 371 states and 460 transitions. [2024-10-14 02:27:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 02:27:33,212 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 70 [2024-10-14 02:27:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:33,214 INFO L225 Difference]: With dead ends: 371 [2024-10-14 02:27:33,214 INFO L226 Difference]: Without dead ends: 299 [2024-10-14 02:27:33,215 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2024-10-14 02:27:33,215 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 40 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:33,216 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 346 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 02:27:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-10-14 02:27:33,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 259. [2024-10-14 02:27:33,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 174 states have (on average 1.1839080459770115) internal successors, (206), 182 states have internal predecessors, (206), 54 states have call successors, (54), 31 states have call predecessors, (54), 30 states have return successors, (51), 45 states have call predecessors, (51), 51 states have call successors, (51) [2024-10-14 02:27:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 311 transitions. [2024-10-14 02:27:33,271 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 311 transitions. Word has length 70 [2024-10-14 02:27:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:33,271 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 311 transitions. [2024-10-14 02:27:33,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2024-10-14 02:27:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 311 transitions. [2024-10-14 02:27:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-14 02:27:33,274 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:33,274 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:33,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-14 02:27:33,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:33,475 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:33,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:33,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1368309367, now seen corresponding path program 2 times [2024-10-14 02:27:33,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:33,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789604116] [2024-10-14 02:27:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:33,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:33,671 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:33,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:33,679 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:33,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:33,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:33,697 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:33,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:33,706 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:27:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:33,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-14 02:27:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:33,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-14 02:27:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-14 02:27:33,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:33,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789604116] [2024-10-14 02:27:33,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789604116] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:33,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510633177] [2024-10-14 02:27:33,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 02:27:33,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:33,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:33,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:33,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 02:27:33,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 02:27:33,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:27:33,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:27:33,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-14 02:27:33,826 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-14 02:27:33,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510633177] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:33,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:27:33,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-10-14 02:27:33,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771067901] [2024-10-14 02:27:33,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:33,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:27:33,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:27:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:27:33,914 INFO L87 Difference]: Start difference. First operand 259 states and 311 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-14 02:27:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:33,990 INFO L93 Difference]: Finished difference Result 294 states and 352 transitions. [2024-10-14 02:27:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 02:27:33,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 73 [2024-10-14 02:27:33,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:33,994 INFO L225 Difference]: With dead ends: 294 [2024-10-14 02:27:33,994 INFO L226 Difference]: Without dead ends: 247 [2024-10-14 02:27:33,994 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:27:33,995 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:33,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:27:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-10-14 02:27:34,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 239. [2024-10-14 02:27:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 167 states have internal predecessors, (190), 48 states have call successors, (48), 29 states have call predecessors, (48), 28 states have return successors, (46), 42 states have call predecessors, (46), 46 states have call successors, (46) [2024-10-14 02:27:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 284 transitions. [2024-10-14 02:27:34,038 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 284 transitions. Word has length 73 [2024-10-14 02:27:34,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:34,039 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 284 transitions. [2024-10-14 02:27:34,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-14 02:27:34,040 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 284 transitions. [2024-10-14 02:27:34,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-14 02:27:34,041 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:34,041 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:34,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 02:27:34,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-14 02:27:34,246 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:34,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:34,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1423174812, now seen corresponding path program 1 times [2024-10-14 02:27:34,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:34,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378733390] [2024-10-14 02:27:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:34,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,476 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,485 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,487 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,492 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:27:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-14 02:27:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,517 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-14 02:27:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-14 02:27:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-14 02:27:34,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:34,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378733390] [2024-10-14 02:27:34,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378733390] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:34,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587744929] [2024-10-14 02:27:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:34,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:34,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:34,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:34,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 02:27:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:34,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 02:27:34,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-10-14 02:27:34,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-10-14 02:27:35,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587744929] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:35,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:27:35,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 10] total 19 [2024-10-14 02:27:35,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121282444] [2024-10-14 02:27:35,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:35,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 02:27:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:35,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 02:27:35,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-10-14 02:27:35,338 INFO L87 Difference]: Start difference. First operand 239 states and 284 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) [2024-10-14 02:27:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:35,723 INFO L93 Difference]: Finished difference Result 252 states and 302 transitions. [2024-10-14 02:27:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 02:27:35,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) Word has length 75 [2024-10-14 02:27:35,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:35,726 INFO L225 Difference]: With dead ends: 252 [2024-10-14 02:27:35,726 INFO L226 Difference]: Without dead ends: 227 [2024-10-14 02:27:35,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-10-14 02:27:35,727 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:35,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 242 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 02:27:35,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-10-14 02:27:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2024-10-14 02:27:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 149 states have (on average 1.1812080536912752) internal successors, (176), 154 states have internal predecessors, (176), 44 states have call successors, (44), 27 states have call predecessors, (44), 26 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2024-10-14 02:27:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 262 transitions. [2024-10-14 02:27:35,776 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 262 transitions. Word has length 75 [2024-10-14 02:27:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:35,777 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 262 transitions. [2024-10-14 02:27:35,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) [2024-10-14 02:27:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 262 transitions. [2024-10-14 02:27:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-14 02:27:35,781 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:35,781 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:35,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-14 02:27:35,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 02:27:35,982 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:35,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash -943280831, now seen corresponding path program 1 times [2024-10-14 02:27:35,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:35,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449877939] [2024-10-14 02:27:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:35,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,041 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,044 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,054 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,061 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:27:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,067 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-14 02:27:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,072 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-14 02:27:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-14 02:27:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-10-14 02:27:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-10-14 02:27:36,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:36,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449877939] [2024-10-14 02:27:36,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449877939] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:36,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729095902] [2024-10-14 02:27:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:36,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:36,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:36,084 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:36,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 02:27:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:36,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 02:27:36,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-14 02:27:36,171 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:27:36,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729095902] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:27:36,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 02:27:36,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-10-14 02:27:36,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628743825] [2024-10-14 02:27:36,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:27:36,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:27:36,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:36,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:27:36,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:27:36,173 INFO L87 Difference]: Start difference. First operand 220 states and 262 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-14 02:27:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:36,285 INFO L93 Difference]: Finished difference Result 242 states and 290 transitions. [2024-10-14 02:27:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:27:36,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2024-10-14 02:27:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:36,287 INFO L225 Difference]: With dead ends: 242 [2024-10-14 02:27:36,287 INFO L226 Difference]: Without dead ends: 222 [2024-10-14 02:27:36,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:27:36,288 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:36,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 82 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:27:36,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-10-14 02:27:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2024-10-14 02:27:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 146 states have (on average 1.1506849315068493) internal successors, (168), 149 states have internal predecessors, (168), 42 states have call successors, (42), 25 states have call predecessors, (42), 25 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2024-10-14 02:27:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 251 transitions. [2024-10-14 02:27:36,330 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 251 transitions. Word has length 79 [2024-10-14 02:27:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:36,330 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 251 transitions. [2024-10-14 02:27:36,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-14 02:27:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 251 transitions. [2024-10-14 02:27:36,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-14 02:27:36,331 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:36,331 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:36,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 02:27:36,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 02:27:36,532 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:36,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:36,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1566685696, now seen corresponding path program 3 times [2024-10-14 02:27:36,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:36,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651132973] [2024-10-14 02:27:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:36,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:27:36,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437926462] [2024-10-14 02:27:36,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 02:27:36,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:36,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:36,564 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:36,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 02:27:36,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 02:27:36,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:27:36,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-14 02:27:36,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-14 02:27:37,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-14 02:27:51,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:51,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651132973] [2024-10-14 02:27:51,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:27:51,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437926462] [2024-10-14 02:27:51,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437926462] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:51,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:27:51,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-10-14 02:27:51,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215385220] [2024-10-14 02:27:51,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:51,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 02:27:51,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:51,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 02:27:51,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-10-14 02:27:51,621 INFO L87 Difference]: Start difference. First operand 214 states and 251 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-10-14 02:27:58,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:58,271 INFO L93 Difference]: Finished difference Result 281 states and 355 transitions. [2024-10-14 02:27:58,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 02:27:58,271 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 91 [2024-10-14 02:27:58,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:58,273 INFO L225 Difference]: With dead ends: 281 [2024-10-14 02:27:58,273 INFO L226 Difference]: Without dead ends: 260 [2024-10-14 02:27:58,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2024-10-14 02:27:58,274 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 96 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:58,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 490 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-10-14 02:27:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-10-14 02:27:58,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 238. [2024-10-14 02:27:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 160 states have (on average 1.175) internal successors, (188), 167 states have internal predecessors, (188), 51 states have call successors, (51), 26 states have call predecessors, (51), 26 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2024-10-14 02:27:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 289 transitions. [2024-10-14 02:27:58,328 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 289 transitions. Word has length 91 [2024-10-14 02:27:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:58,329 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 289 transitions. [2024-10-14 02:27:58,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-10-14 02:27:58,329 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 289 transitions. [2024-10-14 02:27:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-10-14 02:27:58,330 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:58,330 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:58,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 02:27:58,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 02:27:58,531 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:58,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:58,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1284141284, now seen corresponding path program 1 times [2024-10-14 02:27:58,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:58,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009690669] [2024-10-14 02:27:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:58,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,688 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:27:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,691 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:27:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:27:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:27:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,700 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:27:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,702 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:27:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:27:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:27:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-14 02:27:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-14 02:27:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,716 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-14 02:27:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,722 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-14 02:27:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-10-14 02:27:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,732 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-10-14 02:27:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-10-14 02:27:58,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:27:58,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009690669] [2024-10-14 02:27:58,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009690669] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:27:58,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127265803] [2024-10-14 02:27:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:58,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:58,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:58,736 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:58,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 02:27:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:27:58,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 02:27:58,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:27:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-10-14 02:27:58,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:27:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-10-14 02:27:59,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127265803] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:27:59,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:27:59,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-10-14 02:27:59,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305064123] [2024-10-14 02:27:59,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:27:59,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 02:27:59,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:27:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 02:27:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-10-14 02:27:59,044 INFO L87 Difference]: Start difference. First operand 238 states and 289 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-10-14 02:27:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:27:59,465 INFO L93 Difference]: Finished difference Result 591 states and 740 transitions. [2024-10-14 02:27:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 02:27:59,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 97 [2024-10-14 02:27:59,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:27:59,469 INFO L225 Difference]: With dead ends: 591 [2024-10-14 02:27:59,469 INFO L226 Difference]: Without dead ends: 507 [2024-10-14 02:27:59,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2024-10-14 02:27:59,472 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 164 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:27:59,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 223 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 02:27:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2024-10-14 02:27:59,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 488. [2024-10-14 02:27:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 320 states have (on average 1.196875) internal successors, (383), 345 states have internal predecessors, (383), 110 states have call successors, (110), 57 states have call predecessors, (110), 57 states have return successors, (105), 85 states have call predecessors, (105), 105 states have call successors, (105) [2024-10-14 02:27:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 598 transitions. [2024-10-14 02:27:59,597 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 598 transitions. Word has length 97 [2024-10-14 02:27:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:27:59,598 INFO L471 AbstractCegarLoop]: Abstraction has 488 states and 598 transitions. [2024-10-14 02:27:59,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-10-14 02:27:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 598 transitions. [2024-10-14 02:27:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-10-14 02:27:59,599 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:27:59,599 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:27:59,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-14 02:27:59,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-14 02:27:59,805 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:27:59,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:27:59,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1622674746, now seen corresponding path program 2 times [2024-10-14 02:27:59,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:27:59,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658983451] [2024-10-14 02:27:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:27:59,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:27:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:27:59,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765173049] [2024-10-14 02:27:59,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 02:27:59,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:27:59,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:27:59,846 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:27:59,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 02:27:59,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 02:27:59,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:27:59,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-14 02:27:59,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:28:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-14 02:28:01,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:28:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-14 02:28:12,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:28:12,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658983451] [2024-10-14 02:28:12,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:28:12,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765173049] [2024-10-14 02:28:12,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765173049] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:28:12,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:28:12,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2024-10-14 02:28:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590147210] [2024-10-14 02:28:12,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:28:12,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 02:28:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:28:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 02:28:12,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-10-14 02:28:12,078 INFO L87 Difference]: Start difference. First operand 488 states and 598 transitions. Second operand has 26 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-10-14 02:28:17,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:28:17,019 INFO L93 Difference]: Finished difference Result 533 states and 666 transitions. [2024-10-14 02:28:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-14 02:28:17,020 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 102 [2024-10-14 02:28:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:28:17,023 INFO L225 Difference]: With dead ends: 533 [2024-10-14 02:28:17,023 INFO L226 Difference]: Without dead ends: 529 [2024-10-14 02:28:17,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 02:28:17,024 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 57 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:28:17,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 656 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-10-14 02:28:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2024-10-14 02:28:17,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 490. [2024-10-14 02:28:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 322 states have (on average 1.1925465838509317) internal successors, (384), 346 states have internal predecessors, (384), 110 states have call successors, (110), 58 states have call predecessors, (110), 57 states have return successors, (105), 85 states have call predecessors, (105), 105 states have call successors, (105) [2024-10-14 02:28:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 599 transitions. [2024-10-14 02:28:17,180 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 599 transitions. Word has length 102 [2024-10-14 02:28:17,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:28:17,181 INFO L471 AbstractCegarLoop]: Abstraction has 490 states and 599 transitions. [2024-10-14 02:28:17,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-10-14 02:28:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 599 transitions. [2024-10-14 02:28:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-10-14 02:28:17,182 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:28:17,182 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:28:17,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-14 02:28:17,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:28:17,387 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:28:17,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:28:17,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1301888486, now seen corresponding path program 1 times [2024-10-14 02:28:17,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:28:17,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172311307] [2024-10-14 02:28:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:28:17,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:28:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:28:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:28:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:28:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:28:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:28:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:28:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,634 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:28:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:28:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-14 02:28:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-14 02:28:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-14 02:28:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,647 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-10-14 02:28:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-10-14 02:28:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,653 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-14 02:28:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,655 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-14 02:28:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-14 02:28:17,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:28:17,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172311307] [2024-10-14 02:28:17,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172311307] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:28:17,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795002603] [2024-10-14 02:28:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:28:17,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:28:17,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:28:17,661 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:28:17,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 02:28:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:17,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 02:28:17,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:28:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-14 02:28:17,847 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:28:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-14 02:28:18,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795002603] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:28:18,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:28:18,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 20 [2024-10-14 02:28:18,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090786769] [2024-10-14 02:28:18,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:28:18,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 02:28:18,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:28:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 02:28:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=224, Unknown=0, NotChecked=0, Total=380 [2024-10-14 02:28:18,031 INFO L87 Difference]: Start difference. First operand 490 states and 599 transitions. Second operand has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 13 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2024-10-14 02:28:18,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:28:18,604 INFO L93 Difference]: Finished difference Result 835 states and 1038 transitions. [2024-10-14 02:28:18,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 02:28:18,604 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 13 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) Word has length 105 [2024-10-14 02:28:18,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:28:18,612 INFO L225 Difference]: With dead ends: 835 [2024-10-14 02:28:18,613 INFO L226 Difference]: Without dead ends: 789 [2024-10-14 02:28:18,613 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2024-10-14 02:28:18,614 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 242 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 02:28:18,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 264 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 02:28:18,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2024-10-14 02:28:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 772. [2024-10-14 02:28:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 516 states have (on average 1.1395348837209303) internal successors, (588), 551 states have internal predecessors, (588), 173 states have call successors, (173), 83 states have call predecessors, (173), 82 states have return successors, (164), 137 states have call predecessors, (164), 164 states have call successors, (164) [2024-10-14 02:28:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 925 transitions. [2024-10-14 02:28:18,823 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 925 transitions. Word has length 105 [2024-10-14 02:28:18,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:28:18,823 INFO L471 AbstractCegarLoop]: Abstraction has 772 states and 925 transitions. [2024-10-14 02:28:18,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 13 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2024-10-14 02:28:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 925 transitions. [2024-10-14 02:28:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-10-14 02:28:18,825 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:28:18,825 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-10-14 02:28:18,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-14 02:28:19,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:28:19,030 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:28:19,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:28:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1303616364, now seen corresponding path program 4 times [2024-10-14 02:28:19,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:28:19,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265501316] [2024-10-14 02:28:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:28:19,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:28:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,277 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:28:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,280 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:28:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:28:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,284 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:28:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:28:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,290 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:28:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:28:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:28:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,296 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-14 02:28:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,298 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-14 02:28:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-14 02:28:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,305 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-10-14 02:28:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-10-14 02:28:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-14 02:28:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-14 02:28:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-14 02:28:19,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:28:19,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265501316] [2024-10-14 02:28:19,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265501316] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:28:19,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728716017] [2024-10-14 02:28:19,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 02:28:19,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:28:19,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:28:19,317 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:28:19,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 02:28:19,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 02:28:19,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:28:19,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 02:28:19,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:28:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-14 02:28:19,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:28:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-14 02:28:19,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728716017] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:28:19,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:28:19,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-10-14 02:28:19,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096233928] [2024-10-14 02:28:19,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:28:19,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 02:28:19,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:28:19,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 02:28:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 02:28:19,610 INFO L87 Difference]: Start difference. First operand 772 states and 925 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-10-14 02:28:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:28:19,851 INFO L93 Difference]: Finished difference Result 923 states and 1114 transitions. [2024-10-14 02:28:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:28:19,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 105 [2024-10-14 02:28:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:28:19,855 INFO L225 Difference]: With dead ends: 923 [2024-10-14 02:28:19,855 INFO L226 Difference]: Without dead ends: 764 [2024-10-14 02:28:19,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 02:28:19,857 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:28:19,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 201 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:28:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2024-10-14 02:28:20,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 762. [2024-10-14 02:28:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 510 states have (on average 1.1372549019607843) internal successors, (580), 544 states have internal predecessors, (580), 169 states have call successors, (169), 83 states have call predecessors, (169), 82 states have return successors, (160), 134 states have call predecessors, (160), 160 states have call successors, (160) [2024-10-14 02:28:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 909 transitions. [2024-10-14 02:28:20,050 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 909 transitions. Word has length 105 [2024-10-14 02:28:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:28:20,050 INFO L471 AbstractCegarLoop]: Abstraction has 762 states and 909 transitions. [2024-10-14 02:28:20,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-10-14 02:28:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 909 transitions. [2024-10-14 02:28:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-10-14 02:28:20,053 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:28:20,054 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:28:20,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-14 02:28:20,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:28:20,255 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:28:20,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:28:20,255 INFO L85 PathProgramCache]: Analyzing trace with hash 831358745, now seen corresponding path program 2 times [2024-10-14 02:28:20,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:28:20,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305118883] [2024-10-14 02:28:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:28:20,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:28:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,580 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:28:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:28:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:28:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:28:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,590 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:28:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:28:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:28:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:28:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-14 02:28:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-14 02:28:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-14 02:28:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-10-14 02:28:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-10-14 02:28:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-14 02:28:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-14 02:28:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,634 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-10-14 02:28:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-10-14 02:28:20,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:28:20,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305118883] [2024-10-14 02:28:20,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305118883] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:28:20,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677894126] [2024-10-14 02:28:20,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 02:28:20,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:28:20,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:28:20,639 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:28:20,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 02:28:20,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 02:28:20,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:28:20,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 02:28:20,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:28:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-10-14 02:28:21,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:28:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-10-14 02:28:21,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677894126] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:28:21,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:28:21,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 26 [2024-10-14 02:28:21,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768240531] [2024-10-14 02:28:21,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:28:21,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 02:28:21,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:28:21,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 02:28:21,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-10-14 02:28:21,868 INFO L87 Difference]: Start difference. First operand 762 states and 909 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 23 states have internal predecessors, (74), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2024-10-14 02:28:22,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:28:22,565 INFO L93 Difference]: Finished difference Result 808 states and 988 transitions. [2024-10-14 02:28:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 02:28:22,566 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 23 states have internal predecessors, (74), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) Word has length 107 [2024-10-14 02:28:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:28:22,570 INFO L225 Difference]: With dead ends: 808 [2024-10-14 02:28:22,570 INFO L226 Difference]: Without dead ends: 762 [2024-10-14 02:28:22,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 02:28:22,571 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 02:28:22,571 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 442 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 02:28:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2024-10-14 02:28:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 722. [2024-10-14 02:28:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 483 states have (on average 1.1407867494824016) internal successors, (551), 516 states have internal predecessors, (551), 160 states have call successors, (160), 78 states have call predecessors, (160), 78 states have return successors, (152), 127 states have call predecessors, (152), 152 states have call successors, (152) [2024-10-14 02:28:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 863 transitions. [2024-10-14 02:28:22,825 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 863 transitions. Word has length 107 [2024-10-14 02:28:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:28:22,826 INFO L471 AbstractCegarLoop]: Abstraction has 722 states and 863 transitions. [2024-10-14 02:28:22,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 23 states have internal predecessors, (74), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2024-10-14 02:28:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 863 transitions. [2024-10-14 02:28:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-10-14 02:28:22,827 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:28:22,827 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:28:22,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-14 02:28:23,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-14 02:28:23,032 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:28:23,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:28:23,032 INFO L85 PathProgramCache]: Analyzing trace with hash -446517283, now seen corresponding path program 3 times [2024-10-14 02:28:23,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:28:23,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748867456] [2024-10-14 02:28:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:28:23,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:28:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 02:28:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 02:28:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 02:28:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 02:28:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,190 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 02:28:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,192 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-14 02:28:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,195 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:28:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:28:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-14 02:28:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-14 02:28:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-14 02:28:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-14 02:28:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-14 02:28:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-14 02:28:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-10-14 02:28:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-10-14 02:28:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,219 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-10-14 02:28:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-10-14 02:28:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:28:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 54 proven. 34 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-10-14 02:28:23,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:28:23,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748867456] [2024-10-14 02:28:23,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748867456] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:28:23,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829339130] [2024-10-14 02:28:23,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 02:28:23,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:28:23,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:28:23,226 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:28:23,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 02:28:23,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 02:28:23,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:28:23,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 02:28:23,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:28:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 148 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2024-10-14 02:28:23,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:28:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2024-10-14 02:28:23,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829339130] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:28:23,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:28:23,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 8] total 18 [2024-10-14 02:28:23,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461776625] [2024-10-14 02:28:23,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:28:23,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 02:28:23,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:28:23,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 02:28:23,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-10-14 02:28:23,614 INFO L87 Difference]: Start difference. First operand 722 states and 863 transitions. Second operand has 18 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 10 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 7 states have call successors, (30) [2024-10-14 02:28:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:28:24,891 INFO L93 Difference]: Finished difference Result 861 states and 1020 transitions. [2024-10-14 02:28:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-14 02:28:24,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 10 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 7 states have call successors, (30) Word has length 120 [2024-10-14 02:28:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:28:24,896 INFO L225 Difference]: With dead ends: 861 [2024-10-14 02:28:24,896 INFO L226 Difference]: Without dead ends: 806 [2024-10-14 02:28:24,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2024-10-14 02:28:24,897 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 85 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 02:28:24,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 492 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 02:28:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2024-10-14 02:28:25,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 769. [2024-10-14 02:28:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 523 states have (on average 1.1204588910133844) internal successors, (586), 546 states have internal predecessors, (586), 154 states have call successors, (154), 91 states have call predecessors, (154), 91 states have return successors, (147), 131 states have call predecessors, (147), 147 states have call successors, (147) [2024-10-14 02:28:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 887 transitions. [2024-10-14 02:28:25,151 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 887 transitions. Word has length 120 [2024-10-14 02:28:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:28:25,151 INFO L471 AbstractCegarLoop]: Abstraction has 769 states and 887 transitions. [2024-10-14 02:28:25,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 10 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 7 states have call successors, (30) [2024-10-14 02:28:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 887 transitions. [2024-10-14 02:28:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-10-14 02:28:25,153 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:28:25,153 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-10-14 02:28:25,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-14 02:28:25,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:28:25,358 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:28:25,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:28:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1867395829, now seen corresponding path program 5 times [2024-10-14 02:28:25,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:28:25,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468141413] [2024-10-14 02:28:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:28:25,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:28:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:28:25,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021012557] [2024-10-14 02:28:25,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 02:28:25,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:28:25,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:28:25,418 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:28:25,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 02:28:25,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-10-14 02:28:25,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:28:25,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-14 02:28:25,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:28:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 68 proven. 82 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-10-14 02:28:26,283 INFO L311 TraceCheckSpWp]: Computing backward predicates...