./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/egcd3-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7004d2b01bb7d5c4b1956f589017b61646e33c2f2be997467596b458e0de6322 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 02:09:43,271 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 02:09:43,330 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 02:09:43,334 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 02:09:43,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 02:09:43,369 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 02:09:43,369 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 02:09:43,370 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 02:09:43,370 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 02:09:43,371 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 02:09:43,371 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 02:09:43,372 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 02:09:43,372 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 02:09:43,372 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 02:09:43,373 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 02:09:43,373 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 02:09:43,373 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 02:09:43,374 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 02:09:43,374 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 02:09:43,374 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 02:09:43,375 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 02:09:43,375 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 02:09:43,376 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 02:09:43,376 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 02:09:43,376 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 02:09:43,377 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 02:09:43,377 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 02:09:43,377 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 02:09:43,377 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 02:09:43,378 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 02:09:43,378 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 02:09:43,378 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 02:09:43,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:09:43,379 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 02:09:43,379 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 02:09:43,380 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 02:09:43,380 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 02:09:43,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 02:09:43,380 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 02:09:43,381 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 02:09:43,381 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 02:09:43,383 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 02:09:43,383 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7004d2b01bb7d5c4b1956f589017b61646e33c2f2be997467596b458e0de6322 [2024-10-11 02:09:43,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 02:09:43,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 02:09:43,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 02:09:43,663 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 02:09:43,664 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 02:09:43,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2024-10-11 02:09:45,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 02:09:45,340 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 02:09:45,342 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2024-10-11 02:09:45,349 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c7a067900/398b224da8ba44bbad2c1331e0420256/FLAG2d1f697ee [2024-10-11 02:09:45,367 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c7a067900/398b224da8ba44bbad2c1331e0420256 [2024-10-11 02:09:45,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 02:09:45,373 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 02:09:45,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 02:09:45,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 02:09:45,383 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 02:09:45,384 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b7ad15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45, skipping insertion in model container [2024-10-11 02:09:45,386 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,408 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 02:09:45,587 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/egcd3-ll_unwindbound20.c[490,503] [2024-10-11 02:09:45,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:09:45,620 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 02:09:45,632 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/egcd3-ll_unwindbound20.c[490,503] [2024-10-11 02:09:45,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:09:45,656 INFO L204 MainTranslator]: Completed translation [2024-10-11 02:09:45,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45 WrapperNode [2024-10-11 02:09:45,656 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 02:09:45,657 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 02:09:45,658 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 02:09:45,658 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 02:09:45,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,697 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 94 [2024-10-11 02:09:45,697 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 02:09:45,698 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 02:09:45,698 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 02:09:45,698 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 02:09:45,708 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,710 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,726 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]. [2024-10-11 02:09:45,726 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,726 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,730 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,734 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,735 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,736 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,738 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 02:09:45,739 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 02:09:45,739 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 02:09:45,740 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 02:09:45,740 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (1/1) ... [2024-10-11 02:09:45,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:09:45,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:45,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 02:09:45,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 02:09:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 02:09:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-11 02:09:45,821 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-11 02:09:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 02:09:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 02:09:45,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 02:09:45,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 02:09:45,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 02:09:45,903 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 02:09:45,906 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 02:09:46,129 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-11 02:09:46,133 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 02:09:46,160 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 02:09:46,163 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 02:09:46,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:09:46 BoogieIcfgContainer [2024-10-11 02:09:46,164 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 02:09:46,166 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 02:09:46,166 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 02:09:46,170 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 02:09:46,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:09:45" (1/3) ... [2024-10-11 02:09:46,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759d57fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:09:46, skipping insertion in model container [2024-10-11 02:09:46,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:45" (2/3) ... [2024-10-11 02:09:46,173 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759d57fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:09:46, skipping insertion in model container [2024-10-11 02:09:46,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:09:46" (3/3) ... [2024-10-11 02:09:46,175 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.c [2024-10-11 02:09:46,193 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 02:09:46,193 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 02:09:46,255 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 02:09:46,263 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;@5dc09f38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 02:09:46,264 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 02:09:46,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-11 02:09:46,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 02:09:46,282 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:46,283 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:46,283 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:46,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:46,290 INFO L85 PathProgramCache]: Analyzing trace with hash -832436526, now seen corresponding path program 1 times [2024-10-11 02:09:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:46,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161165649] [2024-10-11 02:09:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:46,487 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:46,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:46,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:46,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161165649] [2024-10-11 02:09:46,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161165649] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:46,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:46,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 02:09:46,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710682818] [2024-10-11 02:09:46,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:46,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 02:09:46,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:46,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 02:09:46,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:09:46,573 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 02:09:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:46,609 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2024-10-11 02:09:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 02:09:46,613 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-10-11 02:09:46,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:46,622 INFO L225 Difference]: With dead ends: 62 [2024-10-11 02:09:46,622 INFO L226 Difference]: Without dead ends: 30 [2024-10-11 02:09:46,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:09:46,631 INFO L432 NwaCegarLoop]: 40 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, 40 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 [2024-10-11 02:09:46,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-11 02:09:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-11 02:09:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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) [2024-10-11 02:09:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2024-10-11 02:09:46,672 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 17 [2024-10-11 02:09:46,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:46,673 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2024-10-11 02:09:46,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 02:09:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2024-10-11 02:09:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-11 02:09:46,675 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:46,675 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:46,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 02:09:46,675 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:46,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:46,676 INFO L85 PathProgramCache]: Analyzing trace with hash 958862887, now seen corresponding path program 1 times [2024-10-11 02:09:46,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:46,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375435808] [2024-10-11 02:09:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:46,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:46,851 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:46,863 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:46,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:46,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375435808] [2024-10-11 02:09:46,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375435808] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:46,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:46,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 02:09:46,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817796599] [2024-10-11 02:09:46,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:46,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 02:09:46,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 02:09:46,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 02:09:46,886 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 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) [2024-10-11 02:09:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:46,932 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2024-10-11 02:09:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 02:09:46,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 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 18 [2024-10-11 02:09:46,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:46,934 INFO L225 Difference]: With dead ends: 39 [2024-10-11 02:09:46,934 INFO L226 Difference]: Without dead ends: 32 [2024-10-11 02:09:46,935 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 02:09:46,937 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:46,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 100 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:46,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-11 02:09:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-11 02:09:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 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) [2024-10-11 02:09:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-10-11 02:09:46,946 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2024-10-11 02:09:46,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:46,948 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-10-11 02:09:46,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 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) [2024-10-11 02:09:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-10-11 02:09:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 02:09:46,949 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:46,949 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:46,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 02:09:46,950 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:46,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:46,953 INFO L85 PathProgramCache]: Analyzing trace with hash -359656705, now seen corresponding path program 1 times [2024-10-11 02:09:46,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:46,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227708892] [2024-10-11 02:09:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:46,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:47,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:47,143 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 02:09:47,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:47,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227708892] [2024-10-11 02:09:47,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227708892] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:47,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:47,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 02:09:47,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493926769] [2024-10-11 02:09:47,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:47,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 02:09:47,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 02:09:47,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:47,193 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:09:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:47,306 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2024-10-11 02:09:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:09:47,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-10-11 02:09:47,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:47,310 INFO L225 Difference]: With dead ends: 52 [2024-10-11 02:09:47,311 INFO L226 Difference]: Without dead ends: 45 [2024-10-11 02:09:47,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:09:47,312 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:47,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 130 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-11 02:09:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2024-10-11 02:09:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2024-10-11 02:09:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-10-11 02:09:47,325 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2024-10-11 02:09:47,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:47,325 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-10-11 02:09:47,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:09:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-10-11 02:09:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-11 02:09:47,327 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:47,327 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:47,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 02:09:47,327 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:47,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1735129581, now seen corresponding path program 1 times [2024-10-11 02:09:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:47,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409881500] [2024-10-11 02:09:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:47,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:47,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:47,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:47,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:47,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409881500] [2024-10-11 02:09:47,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409881500] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:47,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:47,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 02:09:47,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964115750] [2024-10-11 02:09:47,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:47,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 02:09:47,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:47,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 02:09:47,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:47,498 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 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) [2024-10-11 02:09:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:47,555 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2024-10-11 02:09:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:09:47,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 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 24 [2024-10-11 02:09:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:47,557 INFO L225 Difference]: With dead ends: 57 [2024-10-11 02:09:47,557 INFO L226 Difference]: Without dead ends: 35 [2024-10-11 02:09:47,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:47,559 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:47,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 126 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-11 02:09:47,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-11 02:09:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 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) [2024-10-11 02:09:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-10-11 02:09:47,567 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 24 [2024-10-11 02:09:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:47,567 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-10-11 02:09:47,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 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) [2024-10-11 02:09:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-10-11 02:09:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-11 02:09:47,569 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:47,569 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:47,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 02:09:47,569 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:47,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:47,570 INFO L85 PathProgramCache]: Analyzing trace with hash 150917056, now seen corresponding path program 1 times [2024-10-11 02:09:47,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:47,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636615560] [2024-10-11 02:09:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:47,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:47,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080493464] [2024-10-11 02:09:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:47,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:47,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:47,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:47,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 02:09:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:47,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:09:47,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:47,842 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:09:47,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:47,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636615560] [2024-10-11 02:09:47,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:47,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080493464] [2024-10-11 02:09:47,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080493464] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:47,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:47,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:47,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975703661] [2024-10-11 02:09:47,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:47,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:47,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:47,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:47,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:47,845 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 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) [2024-10-11 02:09:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:47,903 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2024-10-11 02:09:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:09:47,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 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 24 [2024-10-11 02:09:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:47,905 INFO L225 Difference]: With dead ends: 53 [2024-10-11 02:09:47,905 INFO L226 Difference]: Without dead ends: 51 [2024-10-11 02:09:47,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:47,906 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 131 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 [2024-10-11 02:09:47,906 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 131 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:47,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-11 02:09:47,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-10-11 02:09:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-11 02:09:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2024-10-11 02:09:47,922 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 24 [2024-10-11 02:09:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:47,922 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2024-10-11 02:09:47,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 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) [2024-10-11 02:09:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2024-10-11 02:09:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 02:09:47,923 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:47,923 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:47,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 02:09:48,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:48,129 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:48,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:48,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1833090586, now seen corresponding path program 1 times [2024-10-11 02:09:48,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:48,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149957114] [2024-10-11 02:09:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:48,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:48,241 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:48,247 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:48,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:48,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149957114] [2024-10-11 02:09:48,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149957114] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:48,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015823089] [2024-10-11 02:09:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:48,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:48,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:48,256 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:48,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 02:09:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:48,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:09:48,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:48,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:48,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015823089] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:48,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:09:48,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-10-11 02:09:48,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413804355] [2024-10-11 02:09:48,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:48,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 02:09:48,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:48,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 02:09:48,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-10-11 02:09:48,484 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 02:09:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:48,670 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2024-10-11 02:09:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 02:09:48,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2024-10-11 02:09:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:48,674 INFO L225 Difference]: With dead ends: 146 [2024-10-11 02:09:48,674 INFO L226 Difference]: Without dead ends: 139 [2024-10-11 02:09:48,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-10-11 02:09:48,675 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:48,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 220 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-11 02:09:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 96. [2024-10-11 02:09:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.338235294117647) internal successors, (91), 70 states have internal predecessors, (91), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-11 02:09:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2024-10-11 02:09:48,698 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 25 [2024-10-11 02:09:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:48,698 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2024-10-11 02:09:48,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 02:09:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2024-10-11 02:09:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 02:09:48,699 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:48,700 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:48,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 02:09:48,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:48,901 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:48,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:48,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1010868448, now seen corresponding path program 1 times [2024-10-11 02:09:48,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:48,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456968746] [2024-10-11 02:09:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:48,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:48,988 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:49,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 02:09:49,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:49,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456968746] [2024-10-11 02:09:49,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456968746] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:49,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785728484] [2024-10-11 02:09:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:49,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:49,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:49,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:49,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 02:09:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:49,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:09:49,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 02:09:49,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 02:09:49,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785728484] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:49,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:09:49,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-11 02:09:49,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950082543] [2024-10-11 02:09:49,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:49,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 02:09:49,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:49,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 02:09:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-11 02:09:49,228 INFO L87 Difference]: Start difference. First operand 96 states and 129 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 02:09:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:49,439 INFO L93 Difference]: Finished difference Result 182 states and 260 transitions. [2024-10-11 02:09:49,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 02:09:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-10-11 02:09:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:49,444 INFO L225 Difference]: With dead ends: 182 [2024-10-11 02:09:49,444 INFO L226 Difference]: Without dead ends: 170 [2024-10-11 02:09:49,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-10-11 02:09:49,446 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 112 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:49,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 275 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-11 02:09:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2024-10-11 02:09:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 96 states have (on average 1.3541666666666667) internal successors, (130), 97 states have internal predecessors, (130), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-11 02:09:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2024-10-11 02:09:49,474 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 26 [2024-10-11 02:09:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:49,474 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2024-10-11 02:09:49,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 02:09:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2024-10-11 02:09:49,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 02:09:49,477 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:49,477 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:49,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:49,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:49,678 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:49,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2130442992, now seen corresponding path program 1 times [2024-10-11 02:09:49,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:49,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900958243] [2024-10-11 02:09:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:49,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:49,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111080988] [2024-10-11 02:09:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:49,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:49,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:49,696 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:49,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 02:09:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:49,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:09:49,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:49,846 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:09:49,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:49,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900958243] [2024-10-11 02:09:49,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:49,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111080988] [2024-10-11 02:09:49,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111080988] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:49,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:49,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:49,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108416978] [2024-10-11 02:09:49,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:49,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:49,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:49,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:49,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:49,848 INFO L87 Difference]: Start difference. First operand 127 states and 175 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 02:09:49,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:49,913 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2024-10-11 02:09:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:09:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2024-10-11 02:09:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:49,915 INFO L225 Difference]: With dead ends: 142 [2024-10-11 02:09:49,915 INFO L226 Difference]: Without dead ends: 140 [2024-10-11 02:09:49,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:49,916 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:49,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 129 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-11 02:09:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2024-10-11 02:09:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 105 states have (on average 1.3238095238095238) internal successors, (139), 106 states have internal predecessors, (139), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-11 02:09:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2024-10-11 02:09:49,938 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 29 [2024-10-11 02:09:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:49,939 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2024-10-11 02:09:49,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 02:09:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2024-10-11 02:09:49,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-11 02:09:49,940 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:49,940 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:49,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:50,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 02:09:50,145 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:50,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:50,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2110713919, now seen corresponding path program 1 times [2024-10-11 02:09:50,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:50,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738410788] [2024-10-11 02:09:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:50,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:50,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29534355] [2024-10-11 02:09:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:50,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:50,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:50,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:50,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 02:09:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:50,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 02:09:50,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:50,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:50,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:50,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738410788] [2024-10-11 02:09:50,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:50,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29534355] [2024-10-11 02:09:50,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29534355] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:50,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:09:50,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-10-11 02:09:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869015799] [2024-10-11 02:09:50,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:50,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 02:09:50,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:50,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 02:09:50,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:09:50,555 INFO L87 Difference]: Start difference. First operand 139 states and 184 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:09:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:50,732 INFO L93 Difference]: Finished difference Result 174 states and 236 transitions. [2024-10-11 02:09:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:09:50,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-10-11 02:09:50,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:50,734 INFO L225 Difference]: With dead ends: 174 [2024-10-11 02:09:50,734 INFO L226 Difference]: Without dead ends: 172 [2024-10-11 02:09:50,734 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-11 02:09:50,735 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 19 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:50,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 294 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-10-11 02:09:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2024-10-11 02:09:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3492063492063493) internal successors, (170), 127 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-10-11 02:09:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 231 transitions. [2024-10-11 02:09:50,763 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 231 transitions. Word has length 31 [2024-10-11 02:09:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:50,763 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 231 transitions. [2024-10-11 02:09:50,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:09:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 231 transitions. [2024-10-11 02:09:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-11 02:09:50,766 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:50,767 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:50,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 02:09:50,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:50,967 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:50,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:50,968 INFO L85 PathProgramCache]: Analyzing trace with hash -363027956, now seen corresponding path program 1 times [2024-10-11 02:09:50,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:50,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696470526] [2024-10-11 02:09:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:50,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:51,044 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:51,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:51,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:51,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696470526] [2024-10-11 02:09:51,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696470526] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:51,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:51,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 02:09:51,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257553869] [2024-10-11 02:09:51,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:51,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 02:09:51,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 02:09:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:09:51,054 INFO L87 Difference]: Start difference. First operand 169 states and 231 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 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) [2024-10-11 02:09:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:51,106 INFO L93 Difference]: Finished difference Result 236 states and 324 transitions. [2024-10-11 02:09:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 02:09:51,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 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 31 [2024-10-11 02:09:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:51,111 INFO L225 Difference]: With dead ends: 236 [2024-10-11 02:09:51,111 INFO L226 Difference]: Without dead ends: 169 [2024-10-11 02:09:51,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:09:51,112 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:51,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-10-11 02:09:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-10-11 02:09:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3412698412698412) internal successors, (169), 127 states have internal predecessors, (169), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-10-11 02:09:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2024-10-11 02:09:51,138 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 31 [2024-10-11 02:09:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:51,138 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2024-10-11 02:09:51,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 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) [2024-10-11 02:09:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2024-10-11 02:09:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-11 02:09:51,142 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:51,142 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:51,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 02:09:51,142 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:51,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:51,142 INFO L85 PathProgramCache]: Analyzing trace with hash -242784896, now seen corresponding path program 1 times [2024-10-11 02:09:51,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:51,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222465434] [2024-10-11 02:09:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:51,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:51,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179041013] [2024-10-11 02:09:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:51,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:51,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:51,163 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:51,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 02:09:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:51,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:09:51,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 02:09:51,264 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:09:51,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222465434] [2024-10-11 02:09:51,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179041013] [2024-10-11 02:09:51,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179041013] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:51,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:51,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:51,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723289883] [2024-10-11 02:09:51,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:51,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:51,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:51,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:51,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:51,265 INFO L87 Difference]: Start difference. First operand 169 states and 230 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 02:09:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:51,352 INFO L93 Difference]: Finished difference Result 234 states and 330 transitions. [2024-10-11 02:09:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:09:51,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-10-11 02:09:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:51,354 INFO L225 Difference]: With dead ends: 234 [2024-10-11 02:09:51,355 INFO L226 Difference]: Without dead ends: 232 [2024-10-11 02:09:51,355 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:51,355 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:51,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-10-11 02:09:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2024-10-11 02:09:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 159 states have (on average 1.371069182389937) internal successors, (218), 160 states have internal predecessors, (218), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-10-11 02:09:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 319 transitions. [2024-10-11 02:09:51,381 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 319 transitions. Word has length 34 [2024-10-11 02:09:51,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:51,382 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 319 transitions. [2024-10-11 02:09:51,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 02:09:51,382 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 319 transitions. [2024-10-11 02:09:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-11 02:09:51,382 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:51,382 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:51,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 02:09:51,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 02:09:51,583 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:51,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:51,584 INFO L85 PathProgramCache]: Analyzing trace with hash -568879, now seen corresponding path program 1 times [2024-10-11 02:09:51,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:51,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428822116] [2024-10-11 02:09:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:51,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:51,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007460968] [2024-10-11 02:09:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:51,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:51,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:51,598 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:51,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 02:09:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:51,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 02:09:51,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 02:09:51,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:51,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:51,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428822116] [2024-10-11 02:09:51,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:51,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007460968] [2024-10-11 02:09:51,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007460968] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:51,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:09:51,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-11 02:09:51,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991552673] [2024-10-11 02:09:51,940 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:51,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 02:09:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 02:09:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:09:51,941 INFO L87 Difference]: Start difference. First operand 225 states and 319 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 02:09:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:52,128 INFO L93 Difference]: Finished difference Result 237 states and 329 transitions. [2024-10-11 02:09:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 02:09:52,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2024-10-11 02:09:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:52,131 INFO L225 Difference]: With dead ends: 237 [2024-10-11 02:09:52,131 INFO L226 Difference]: Without dead ends: 235 [2024-10-11 02:09:52,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-10-11 02:09:52,132 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 68 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:52,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 253 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-10-11 02:09:52,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2024-10-11 02:09:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 165 states have (on average 1.3575757575757577) internal successors, (224), 166 states have internal predecessors, (224), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-10-11 02:09:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 325 transitions. [2024-10-11 02:09:52,155 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 325 transitions. Word has length 36 [2024-10-11 02:09:52,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:52,156 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 325 transitions. [2024-10-11 02:09:52,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 02:09:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 325 transitions. [2024-10-11 02:09:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-11 02:09:52,156 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:52,156 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:52,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 02:09:52,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:52,361 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:52,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash 895823024, now seen corresponding path program 1 times [2024-10-11 02:09:52,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:52,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751304473] [2024-10-11 02:09:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:52,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:52,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007931839] [2024-10-11 02:09:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:52,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:52,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:52,372 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:52,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 02:09:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:52,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:09:52,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 02:09:52,467 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:09:52,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:52,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751304473] [2024-10-11 02:09:52,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:52,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007931839] [2024-10-11 02:09:52,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007931839] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:52,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:52,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:52,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552381359] [2024-10-11 02:09:52,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:52,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:52,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:52,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:52,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:52,469 INFO L87 Difference]: Start difference. First operand 233 states and 325 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-11 02:09:52,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:52,550 INFO L93 Difference]: Finished difference Result 308 states and 453 transitions. [2024-10-11 02:09:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:09:52,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-10-11 02:09:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:52,553 INFO L225 Difference]: With dead ends: 308 [2024-10-11 02:09:52,553 INFO L226 Difference]: Without dead ends: 306 [2024-10-11 02:09:52,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:52,555 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:52,556 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 129 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-10-11 02:09:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 291. [2024-10-11 02:09:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 186 states have (on average 1.3602150537634408) internal successors, (253), 196 states have internal predecessors, (253), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2024-10-11 02:09:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 426 transitions. [2024-10-11 02:09:52,602 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 426 transitions. Word has length 39 [2024-10-11 02:09:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:52,603 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 426 transitions. [2024-10-11 02:09:52,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-11 02:09:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 426 transitions. [2024-10-11 02:09:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-11 02:09:52,604 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:52,604 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:52,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 02:09:52,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 02:09:52,809 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:52,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:52,809 INFO L85 PathProgramCache]: Analyzing trace with hash 184539710, now seen corresponding path program 1 times [2024-10-11 02:09:52,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:52,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26299617] [2024-10-11 02:09:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:52,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:52,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:52,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 02:09:52,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:52,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26299617] [2024-10-11 02:09:52,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26299617] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:52,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010524137] [2024-10-11 02:09:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:52,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:52,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:52,913 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:52,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 02:09:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:52,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:09:52,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 02:09:53,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 02:09:53,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010524137] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:53,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:09:53,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 14 [2024-10-11 02:09:53,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37377350] [2024-10-11 02:09:53,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:53,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 02:09:53,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 02:09:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2024-10-11 02:09:53,097 INFO L87 Difference]: Start difference. First operand 291 states and 426 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 02:09:53,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:53,376 INFO L93 Difference]: Finished difference Result 724 states and 1030 transitions. [2024-10-11 02:09:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 02:09:53,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-10-11 02:09:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:53,382 INFO L225 Difference]: With dead ends: 724 [2024-10-11 02:09:53,382 INFO L226 Difference]: Without dead ends: 574 [2024-10-11 02:09:53,384 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2024-10-11 02:09:53,384 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 141 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:53,385 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 230 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:09:53,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2024-10-11 02:09:53,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 540. [2024-10-11 02:09:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 356 states have (on average 1.300561797752809) internal successors, (463), 370 states have internal predecessors, (463), 142 states have call successors, (142), 41 states have call predecessors, (142), 41 states have return successors, (138), 128 states have call predecessors, (138), 138 states have call successors, (138) [2024-10-11 02:09:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 743 transitions. [2024-10-11 02:09:53,441 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 743 transitions. Word has length 37 [2024-10-11 02:09:53,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:53,441 INFO L471 AbstractCegarLoop]: Abstraction has 540 states and 743 transitions. [2024-10-11 02:09:53,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 02:09:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 743 transitions. [2024-10-11 02:09:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 02:09:53,442 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:53,442 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:53,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:53,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:53,643 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:53,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:53,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1387261216, now seen corresponding path program 2 times [2024-10-11 02:09:53,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:53,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495320210] [2024-10-11 02:09:53,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:53,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:53,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:53,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:53,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:53,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495320210] [2024-10-11 02:09:53,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495320210] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:53,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:53,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:53,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385392668] [2024-10-11 02:09:53,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:53,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:53,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:53,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:53,697 INFO L87 Difference]: Start difference. First operand 540 states and 743 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 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) [2024-10-11 02:09:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:53,850 INFO L93 Difference]: Finished difference Result 788 states and 1135 transitions. [2024-10-11 02:09:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:09:53,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 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 38 [2024-10-11 02:09:53,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:53,855 INFO L225 Difference]: With dead ends: 788 [2024-10-11 02:09:53,855 INFO L226 Difference]: Without dead ends: 643 [2024-10-11 02:09:53,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:09:53,857 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 29 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:53,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 169 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2024-10-11 02:09:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 538. [2024-10-11 02:09:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 358 states have (on average 1.3072625698324023) internal successors, (468), 372 states have internal predecessors, (468), 138 states have call successors, (138), 41 states have call predecessors, (138), 41 states have return successors, (134), 124 states have call predecessors, (134), 134 states have call successors, (134) [2024-10-11 02:09:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 740 transitions. [2024-10-11 02:09:53,934 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 740 transitions. Word has length 38 [2024-10-11 02:09:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:53,934 INFO L471 AbstractCegarLoop]: Abstraction has 538 states and 740 transitions. [2024-10-11 02:09:53,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 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) [2024-10-11 02:09:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 740 transitions. [2024-10-11 02:09:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 02:09:53,935 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:53,935 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:53,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 02:09:53,936 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:53,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash 869918208, now seen corresponding path program 1 times [2024-10-11 02:09:53,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:53,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76590941] [2024-10-11 02:09:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:53,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:54,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:54,074 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:54,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:54,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76590941] [2024-10-11 02:09:54,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76590941] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:54,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736779229] [2024-10-11 02:09:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:54,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:54,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:54,079 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:54,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 02:09:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:54,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 02:09:54,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:54,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:54,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736779229] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:54,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:09:54,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-10-11 02:09:54,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206854834] [2024-10-11 02:09:54,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:54,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 02:09:54,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:54,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 02:09:54,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2024-10-11 02:09:54,283 INFO L87 Difference]: Start difference. First operand 538 states and 740 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 02:09:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:54,690 INFO L93 Difference]: Finished difference Result 1162 states and 1624 transitions. [2024-10-11 02:09:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 02:09:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2024-10-11 02:09:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:54,695 INFO L225 Difference]: With dead ends: 1162 [2024-10-11 02:09:54,696 INFO L226 Difference]: Without dead ends: 839 [2024-10-11 02:09:54,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2024-10-11 02:09:54,697 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 186 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:54,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 293 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:09:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2024-10-11 02:09:54,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 802. [2024-10-11 02:09:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 532 states have (on average 1.25) internal successors, (665), 554 states have internal predecessors, (665), 212 states have call successors, (212), 57 states have call predecessors, (212), 57 states have return successors, (206), 190 states have call predecessors, (206), 206 states have call successors, (206) [2024-10-11 02:09:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1083 transitions. [2024-10-11 02:09:54,784 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1083 transitions. Word has length 38 [2024-10-11 02:09:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:54,785 INFO L471 AbstractCegarLoop]: Abstraction has 802 states and 1083 transitions. [2024-10-11 02:09:54,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 02:09:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1083 transitions. [2024-10-11 02:09:54,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-11 02:09:54,786 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:54,786 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:54,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 02:09:54,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 02:09:54,991 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:54,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash -263121925, now seen corresponding path program 1 times [2024-10-11 02:09:54,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:54,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524630010] [2024-10-11 02:09:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:54,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:55,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687520030] [2024-10-11 02:09:55,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:55,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:55,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:55,026 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:55,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 02:09:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:55,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-11 02:09:55,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 02:09:55,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 02:09:57,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:57,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524630010] [2024-10-11 02:09:57,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:57,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687520030] [2024-10-11 02:09:57,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687520030] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:57,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:09:57,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-11 02:09:57,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935682259] [2024-10-11 02:09:57,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:57,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 02:09:57,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 02:09:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-10-11 02:09:57,335 INFO L87 Difference]: Start difference. First operand 802 states and 1083 transitions. Second operand has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-11 02:10:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:10:02,078 INFO L93 Difference]: Finished difference Result 1217 states and 1722 transitions. [2024-10-11 02:10:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-11 02:10:02,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (13), 3 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 53 [2024-10-11 02:10:02,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:10:02,086 INFO L225 Difference]: With dead ends: 1217 [2024-10-11 02:10:02,087 INFO L226 Difference]: Without dead ends: 1195 [2024-10-11 02:10:02,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-10-11 02:10:02,089 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 323 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:10:02,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1182 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-10-11 02:10:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2024-10-11 02:10:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 884. [2024-10-11 02:10:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 591 states have (on average 1.2538071065989849) internal successors, (741), 611 states have internal predecessors, (741), 231 states have call successors, (231), 61 states have call predecessors, (231), 61 states have return successors, (226), 211 states have call predecessors, (226), 226 states have call successors, (226) [2024-10-11 02:10:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1198 transitions. [2024-10-11 02:10:02,284 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1198 transitions. Word has length 53 [2024-10-11 02:10:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:10:02,284 INFO L471 AbstractCegarLoop]: Abstraction has 884 states and 1198 transitions. [2024-10-11 02:10:02,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-11 02:10:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1198 transitions. [2024-10-11 02:10:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-11 02:10:02,286 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:10:02,286 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:10:02,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 02:10:02,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 02:10:02,490 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:10:02,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:10:02,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2029616726, now seen corresponding path program 1 times [2024-10-11 02:10:02,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:10:02,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255012049] [2024-10-11 02:10:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:02,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:10:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:02,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:10:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:02,647 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:10:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:02,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-11 02:10:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:02,653 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-11 02:10:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:02,656 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-11 02:10:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:02,658 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-11 02:10:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 02:10:02,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:10:02,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255012049] [2024-10-11 02:10:02,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255012049] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:10:02,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334436284] [2024-10-11 02:10:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:02,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:02,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:10:02,664 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:10:02,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 02:10:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:02,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 02:10:02,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:10:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 02:10:02,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:10:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 02:10:02,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334436284] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:10:02,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:10:02,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 20 [2024-10-11 02:10:02,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732360405] [2024-10-11 02:10:02,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:10:02,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 02:10:02,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:10:02,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 02:10:02,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2024-10-11 02:10:02,959 INFO L87 Difference]: Start difference. First operand 884 states and 1198 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 6 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-10-11 02:10:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:10:03,775 INFO L93 Difference]: Finished difference Result 1905 states and 2712 transitions. [2024-10-11 02:10:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 02:10:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 6 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 59 [2024-10-11 02:10:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:10:03,786 INFO L225 Difference]: With dead ends: 1905 [2024-10-11 02:10:03,786 INFO L226 Difference]: Without dead ends: 1883 [2024-10-11 02:10:03,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2024-10-11 02:10:03,788 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 355 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:10:03,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 330 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 02:10:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2024-10-11 02:10:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1789. [2024-10-11 02:10:04,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1180 states have (on average 1.2923728813559323) internal successors, (1525), 1240 states have internal predecessors, (1525), 511 states have call successors, (511), 97 states have call predecessors, (511), 97 states have return successors, (502), 451 states have call predecessors, (502), 502 states have call successors, (502) [2024-10-11 02:10:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 2538 transitions. [2024-10-11 02:10:04,206 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 2538 transitions. Word has length 59 [2024-10-11 02:10:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:10:04,206 INFO L471 AbstractCegarLoop]: Abstraction has 1789 states and 2538 transitions. [2024-10-11 02:10:04,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 6 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-10-11 02:10:04,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 2538 transitions. [2024-10-11 02:10:04,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-11 02:10:04,207 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:10:04,208 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1] [2024-10-11 02:10:04,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 02:10:04,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 02:10:04,409 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:10:04,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:10:04,409 INFO L85 PathProgramCache]: Analyzing trace with hash -240119973, now seen corresponding path program 1 times [2024-10-11 02:10:04,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:10:04,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896440408] [2024-10-11 02:10:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:04,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:10:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:04,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:10:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:04,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:10:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:04,462 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 02:10:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:04,464 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-11 02:10:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:04,467 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-11 02:10:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:04,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-11 02:10:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:04,472 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-11 02:10:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:04,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-11 02:10:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-11 02:10:04,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:10:04,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896440408] [2024-10-11 02:10:04,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896440408] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:10:04,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:10:04,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:10:04,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392692309] [2024-10-11 02:10:04,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:10:04,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:10:04,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:10:04,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:10:04,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:10:04,481 INFO L87 Difference]: Start difference. First operand 1789 states and 2538 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 02:10:04,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:10:04,896 INFO L93 Difference]: Finished difference Result 3148 states and 4463 transitions. [2024-10-11 02:10:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:10:04,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 61 [2024-10-11 02:10:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:10:04,908 INFO L225 Difference]: With dead ends: 3148 [2024-10-11 02:10:04,908 INFO L226 Difference]: Without dead ends: 1883 [2024-10-11 02:10:04,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:10:04,916 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:10:04,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 126 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:10:04,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2024-10-11 02:10:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1810. [2024-10-11 02:10:05,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1241 states have (on average 1.2957292506043514) internal successors, (1608), 1270 states have internal predecessors, (1608), 471 states have call successors, (471), 97 states have call predecessors, (471), 97 states have return successors, (462), 442 states have call predecessors, (462), 462 states have call successors, (462) [2024-10-11 02:10:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2541 transitions. [2024-10-11 02:10:05,323 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2541 transitions. Word has length 61 [2024-10-11 02:10:05,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:10:05,324 INFO L471 AbstractCegarLoop]: Abstraction has 1810 states and 2541 transitions. [2024-10-11 02:10:05,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 02:10:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2541 transitions. [2024-10-11 02:10:05,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-11 02:10:05,325 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:10:05,325 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1, 1] [2024-10-11 02:10:05,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-11 02:10:05,325 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:10:05,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:10:05,326 INFO L85 PathProgramCache]: Analyzing trace with hash -421215721, now seen corresponding path program 1 times [2024-10-11 02:10:05,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:10:05,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125759886] [2024-10-11 02:10:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:05,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:10:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:10:05,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013435178] [2024-10-11 02:10:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:05,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:05,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:10:05,342 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:10:05,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 02:10:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:05,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 02:10:05,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:10:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-10-11 02:10:05,473 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:10:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-10-11 02:10:05,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:10:05,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125759886] [2024-10-11 02:10:05,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:10:05,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013435178] [2024-10-11 02:10:05,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013435178] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 02:10:05,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:10:05,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-11 02:10:05,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228201723] [2024-10-11 02:10:05,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:10:05,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:10:05,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:10:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:10:05,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:10:05,550 INFO L87 Difference]: Start difference. First operand 1810 states and 2541 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 02:10:05,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:10:05,951 INFO L93 Difference]: Finished difference Result 1848 states and 2578 transitions. [2024-10-11 02:10:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:10:05,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2024-10-11 02:10:05,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:10:05,961 INFO L225 Difference]: With dead ends: 1848 [2024-10-11 02:10:05,962 INFO L226 Difference]: Without dead ends: 1846 [2024-10-11 02:10:05,963 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:10:05,963 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:10:05,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 122 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:10:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2024-10-11 02:10:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1846. [2024-10-11 02:10:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1268 states have (on average 1.2878548895899053) internal successors, (1633), 1297 states have internal predecessors, (1633), 471 states have call successors, (471), 106 states have call predecessors, (471), 106 states have return successors, (462), 442 states have call predecessors, (462), 462 states have call successors, (462) [2024-10-11 02:10:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2566 transitions. [2024-10-11 02:10:06,388 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2566 transitions. Word has length 62 [2024-10-11 02:10:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:10:06,390 INFO L471 AbstractCegarLoop]: Abstraction has 1846 states and 2566 transitions. [2024-10-11 02:10:06,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 02:10:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2566 transitions. [2024-10-11 02:10:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-11 02:10:06,394 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:10:06,394 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 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, 1, 1, 1, 1] [2024-10-11 02:10:06,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 02:10:06,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:06,595 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:10:06,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:10:06,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1734545172, now seen corresponding path program 1 times [2024-10-11 02:10:06,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:10:06,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799693770] [2024-10-11 02:10:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:06,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:10:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:10:06,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519993898] [2024-10-11 02:10:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:06,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:06,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:10:06,612 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:10:06,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 02:10:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:06,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-11 02:10:06,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:10:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-11 02:10:07,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:10:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-11 02:10:08,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:10:08,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799693770] [2024-10-11 02:10:08,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:10:08,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519993898] [2024-10-11 02:10:08,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519993898] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:10:08,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:10:08,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-11 02:10:08,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761240959] [2024-10-11 02:10:08,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:10:08,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 02:10:08,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:10:08,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 02:10:08,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-10-11 02:10:08,513 INFO L87 Difference]: Start difference. First operand 1846 states and 2566 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 20 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-10-11 02:10:13,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:10:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:10:18,365 INFO L93 Difference]: Finished difference Result 2448 states and 3457 transitions. [2024-10-11 02:10:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-11 02:10:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 20 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 63 [2024-10-11 02:10:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:10:18,377 INFO L225 Difference]: With dead ends: 2448 [2024-10-11 02:10:18,377 INFO L226 Difference]: Without dead ends: 2446 [2024-10-11 02:10:18,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-10-11 02:10:18,380 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 262 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 153 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-10-11 02:10:18,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 609 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 469 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2024-10-11 02:10:18,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2024-10-11 02:10:19,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2316. [2024-10-11 02:10:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 1610 states have (on average 1.3093167701863353) internal successors, (2108), 1647 states have internal predecessors, (2108), 591 states have call successors, (591), 114 states have call predecessors, (591), 114 states have return successors, (582), 554 states have call predecessors, (582), 582 states have call successors, (582) [2024-10-11 02:10:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3281 transitions. [2024-10-11 02:10:19,046 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3281 transitions. Word has length 63 [2024-10-11 02:10:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:10:19,047 INFO L471 AbstractCegarLoop]: Abstraction has 2316 states and 3281 transitions. [2024-10-11 02:10:19,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 20 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-10-11 02:10:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3281 transitions. [2024-10-11 02:10:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-11 02:10:19,052 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:10:19,052 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:10:19,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 02:10:19,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-11 02:10:19,253 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:10:19,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:10:19,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2144187133, now seen corresponding path program 2 times [2024-10-11 02:10:19,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:10:19,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895690464] [2024-10-11 02:10:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:19,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:10:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:10:19,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346817501] [2024-10-11 02:10:19,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:10:19,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:19,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:10:19,281 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:10:19,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 02:10:19,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:10:19,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:10:19,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-11 02:10:19,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:10:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-11 02:10:19,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:10:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 02:10:19,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:10:19,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895690464] [2024-10-11 02:10:19,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:10:19,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346817501] [2024-10-11 02:10:19,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346817501] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:10:19,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:10:19,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2024-10-11 02:10:19,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445049101] [2024-10-11 02:10:19,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:10:19,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 02:10:19,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:10:19,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 02:10:19,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:10:19,627 INFO L87 Difference]: Start difference. First operand 2316 states and 3281 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-11 02:10:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:10:20,488 INFO L93 Difference]: Finished difference Result 2758 states and 3906 transitions. [2024-10-11 02:10:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 02:10:20,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2024-10-11 02:10:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:10:20,501 INFO L225 Difference]: With dead ends: 2758 [2024-10-11 02:10:20,501 INFO L226 Difference]: Without dead ends: 2756 [2024-10-11 02:10:20,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-10-11 02:10:20,503 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 88 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:10:20,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 340 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:10:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2024-10-11 02:10:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2563. [2024-10-11 02:10:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 1824 states have (on average 1.3135964912280702) internal successors, (2396), 1873 states have internal predecessors, (2396), 611 states have call successors, (611), 127 states have call predecessors, (611), 127 states have return successors, (602), 562 states have call predecessors, (602), 602 states have call successors, (602) [2024-10-11 02:10:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 3609 transitions. [2024-10-11 02:10:21,110 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 3609 transitions. Word has length 65 [2024-10-11 02:10:21,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:10:21,111 INFO L471 AbstractCegarLoop]: Abstraction has 2563 states and 3609 transitions. [2024-10-11 02:10:21,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-11 02:10:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 3609 transitions. [2024-10-11 02:10:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-11 02:10:21,112 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:10:21,112 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 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, 1, 1, 1, 1] [2024-10-11 02:10:21,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-11 02:10:21,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:21,313 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:10:21,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:10:21,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1940891938, now seen corresponding path program 1 times [2024-10-11 02:10:21,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:10:21,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394982950] [2024-10-11 02:10:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:21,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:10:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:10:21,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821585395] [2024-10-11 02:10:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:21,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:21,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:10:21,335 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:10:21,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 02:10:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:21,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-11 02:10:21,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:10:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-10-11 02:10:22,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:10:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-10-11 02:10:24,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:10:24,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394982950] [2024-10-11 02:10:24,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:10:24,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821585395] [2024-10-11 02:10:24,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821585395] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:10:24,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:10:24,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-10-11 02:10:24,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569089387] [2024-10-11 02:10:24,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:10:24,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 02:10:24,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:10:24,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 02:10:24,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-10-11 02:10:24,228 INFO L87 Difference]: Start difference. First operand 2563 states and 3609 transitions. Second operand has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-11 02:10:30,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:10:30,267 INFO L93 Difference]: Finished difference Result 2868 states and 4008 transitions. [2024-10-11 02:10:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-11 02:10:30,268 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 76 [2024-10-11 02:10:30,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:10:30,283 INFO L225 Difference]: With dead ends: 2868 [2024-10-11 02:10:30,283 INFO L226 Difference]: Without dead ends: 2861 [2024-10-11 02:10:30,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-10-11 02:10:30,286 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 263 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-10-11 02:10:30,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 892 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-10-11 02:10:30,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2024-10-11 02:10:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2779. [2024-10-11 02:10:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 1954 states have (on average 1.3070624360286591) internal successors, (2554), 2004 states have internal predecessors, (2554), 676 states have call successors, (676), 148 states have call predecessors, (676), 148 states have return successors, (670), 626 states have call predecessors, (670), 670 states have call successors, (670) [2024-10-11 02:10:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 3900 transitions. [2024-10-11 02:10:31,046 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 3900 transitions. Word has length 76 [2024-10-11 02:10:31,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:10:31,047 INFO L471 AbstractCegarLoop]: Abstraction has 2779 states and 3900 transitions. [2024-10-11 02:10:31,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-11 02:10:31,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 3900 transitions. [2024-10-11 02:10:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-11 02:10:31,050 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:10:31,050 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:10:31,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-11 02:10:31,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-11 02:10:31,251 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:10:31,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:10:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1286517375, now seen corresponding path program 1 times [2024-10-11 02:10:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:10:31,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307589335] [2024-10-11 02:10:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:31,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:10:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:10:31,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717329043] [2024-10-11 02:10:31,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:31,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:31,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:10:31,270 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:10:31,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 02:10:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:31,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-11 02:10:31,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:10:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-10-11 02:10:31,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:10:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-10-11 02:10:32,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:10:32,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307589335] [2024-10-11 02:10:32,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:10:32,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717329043] [2024-10-11 02:10:32,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717329043] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:10:32,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:10:32,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-11 02:10:32,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701318759] [2024-10-11 02:10:32,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:10:32,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 02:10:32,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:10:32,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 02:10:32,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-10-11 02:10:32,047 INFO L87 Difference]: Start difference. First operand 2779 states and 3900 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-10-11 02:10:34,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:10:34,456 INFO L93 Difference]: Finished difference Result 4052 states and 5924 transitions. [2024-10-11 02:10:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-11 02:10:34,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 91 [2024-10-11 02:10:34,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:10:34,479 INFO L225 Difference]: With dead ends: 4052 [2024-10-11 02:10:34,479 INFO L226 Difference]: Without dead ends: 4048 [2024-10-11 02:10:34,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-10-11 02:10:34,483 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 183 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 02:10:34,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 459 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 02:10:34,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4048 states. [2024-10-11 02:10:35,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4048 to 3761. [2024-10-11 02:10:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3761 states, 2465 states have (on average 1.3509127789046653) internal successors, (3330), 2538 states have internal predecessors, (3330), 1128 states have call successors, (1128), 168 states have call predecessors, (1128), 167 states have return successors, (1122), 1054 states have call predecessors, (1122), 1122 states have call successors, (1122) [2024-10-11 02:10:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3761 states to 3761 states and 5580 transitions. [2024-10-11 02:10:35,974 INFO L78 Accepts]: Start accepts. Automaton has 3761 states and 5580 transitions. Word has length 91 [2024-10-11 02:10:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:10:35,975 INFO L471 AbstractCegarLoop]: Abstraction has 3761 states and 5580 transitions. [2024-10-11 02:10:35,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-10-11 02:10:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3761 states and 5580 transitions. [2024-10-11 02:10:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-10-11 02:10:35,977 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:10:35,977 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:10:35,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-11 02:10:36,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:36,178 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:10:36,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:10:36,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1994866066, now seen corresponding path program 2 times [2024-10-11 02:10:36,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:10:36,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264264135] [2024-10-11 02:10:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:36,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:10:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:10:36,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877649557] [2024-10-11 02:10:36,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:10:36,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:36,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:10:36,206 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:10:36,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 02:10:36,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:10:36,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:10:36,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-10-11 02:10:36,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:10:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 32 proven. 56 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-10-11 02:10:37,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:10:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-10-11 02:10:40,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:10:40,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264264135] [2024-10-11 02:10:40,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:10:40,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877649557] [2024-10-11 02:10:40,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877649557] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:10:40,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:10:40,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2024-10-11 02:10:40,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936668432] [2024-10-11 02:10:40,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:10:40,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 02:10:40,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:10:40,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 02:10:40,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 02:10:40,951 INFO L87 Difference]: Start difference. First operand 3761 states and 5580 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 31 states have internal predecessors, (86), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2024-10-11 02:10:53,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:10:56,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:11:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:11:02,199 INFO L93 Difference]: Finished difference Result 4847 states and 7050 transitions. [2024-10-11 02:11:02,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-10-11 02:11:02,200 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 31 states have internal predecessors, (86), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 93 [2024-10-11 02:11:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:11:02,222 INFO L225 Difference]: With dead ends: 4847 [2024-10-11 02:11:02,223 INFO L226 Difference]: Without dead ends: 4845 [2024-10-11 02:11:02,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1897, Invalid=7033, Unknown=0, NotChecked=0, Total=8930 [2024-10-11 02:11:02,228 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 534 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 317 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:11:02,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 1293 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1379 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2024-10-11 02:11:02,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4845 states. [2024-10-11 02:11:04,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4845 to 4393. [2024-10-11 02:11:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4393 states, 3021 states have (on average 1.3459119496855345) internal successors, (4066), 3107 states have internal predecessors, (4066), 1170 states have call successors, (1170), 202 states have call predecessors, (1170), 201 states have return successors, (1164), 1083 states have call predecessors, (1164), 1164 states have call successors, (1164) [2024-10-11 02:11:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4393 states to 4393 states and 6400 transitions. [2024-10-11 02:11:04,308 INFO L78 Accepts]: Start accepts. Automaton has 4393 states and 6400 transitions. Word has length 93 [2024-10-11 02:11:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:11:04,308 INFO L471 AbstractCegarLoop]: Abstraction has 4393 states and 6400 transitions. [2024-10-11 02:11:04,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 31 states have internal predecessors, (86), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2024-10-11 02:11:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4393 states and 6400 transitions. [2024-10-11 02:11:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-10-11 02:11:04,310 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:11:04,311 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 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] [2024-10-11 02:11:04,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-11 02:11:04,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-11 02:11:04,512 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:11:04,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:11:04,514 INFO L85 PathProgramCache]: Analyzing trace with hash 607563547, now seen corresponding path program 1 times [2024-10-11 02:11:04,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:11:04,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964768939] [2024-10-11 02:11:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:11:04,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:11:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:11:04,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:11:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:11:04,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:11:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:11:04,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-11 02:11:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:11:04,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-11 02:11:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:11:04,799 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-11 02:11:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:11:04,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-11 02:11:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:11:04,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-11 02:11:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:11:04,808 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-11 02:11:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:11:04,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-11 02:11:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:11:04,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-11 02:11:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:11:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-10-11 02:11:04,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:11:04,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964768939] [2024-10-11 02:11:04,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964768939] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:11:04,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533491553] [2024-10-11 02:11:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:11:04,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:11:04,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:11:04,821 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:11:04,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 02:11:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:11:04,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 02:11:04,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:11:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-11 02:11:04,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:11:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-10-11 02:11:05,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533491553] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:11:05,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:11:05,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 13] total 26 [2024-10-11 02:11:05,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252998538] [2024-10-11 02:11:05,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:11:05,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 02:11:05,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:11:05,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 02:11:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=371, Unknown=0, NotChecked=0, Total=650 [2024-10-11 02:11:05,200 INFO L87 Difference]: Start difference. First operand 4393 states and 6400 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 8 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2024-10-11 02:11:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:11:11,237 INFO L93 Difference]: Finished difference Result 11888 states and 18475 transitions. [2024-10-11 02:11:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-11 02:11:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 8 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) Word has length 93 [2024-10-11 02:11:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:11:11,283 INFO L225 Difference]: With dead ends: 11888 [2024-10-11 02:11:11,283 INFO L226 Difference]: Without dead ends: 10391 [2024-10-11 02:11:11,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=628, Invalid=1178, Unknown=0, NotChecked=0, Total=1806 [2024-10-11 02:11:11,294 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 419 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:11:11,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 468 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 02:11:11,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10391 states.