./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/egcd2-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 00:10:57,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 00:10:57,977 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 00:10:57,981 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 00:10:57,982 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 00:10:58,011 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 00:10:58,012 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 00:10:58,013 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 00:10:58,013 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 00:10:58,014 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 00:10:58,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 00:10:58,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 00:10:58,016 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 00:10:58,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 00:10:58,017 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 00:10:58,018 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 00:10:58,018 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 00:10:58,018 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 00:10:58,018 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 00:10:58,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 00:10:58,019 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 00:10:58,021 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 00:10:58,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 00:10:58,022 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 00:10:58,022 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 00:10:58,022 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 00:10:58,023 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 00:10:58,023 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 00:10:58,023 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 00:10:58,023 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 00:10:58,023 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 00:10:58,023 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 00:10:58,024 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:10:58,024 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 00:10:58,024 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 00:10:58,024 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 00:10:58,024 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 00:10:58,024 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 00:10:58,024 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 00:10:58,025 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 00:10:58,025 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 00:10:58,026 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 00:10:58,026 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 [2024-10-24 00:10:58,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 00:10:58,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 00:10:58,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 00:10:58,273 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 00:10:58,274 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 00:10:58,275 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2024-10-24 00:10:59,553 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 00:10:59,705 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 00:10:59,705 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2024-10-24 00:10:59,712 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd8e242a1/24284e3ab7064484ab573a6b8e49c53d/FLAG7198b972e [2024-10-24 00:11:00,119 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd8e242a1/24284e3ab7064484ab573a6b8e49c53d [2024-10-24 00:11:00,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 00:11:00,122 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 00:11:00,123 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 00:11:00,123 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 00:11:00,132 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 00:11:00,132 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,133 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b4adccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00, skipping insertion in model container [2024-10-24 00:11:00,133 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,152 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 00:11:00,281 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/egcd2-ll_valuebound5.c[490,503] [2024-10-24 00:11:00,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:11:00,305 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 00:11:00,314 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/egcd2-ll_valuebound5.c[490,503] [2024-10-24 00:11:00,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:11:00,334 INFO L204 MainTranslator]: Completed translation [2024-10-24 00:11:00,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00 WrapperNode [2024-10-24 00:11:00,335 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 00:11:00,337 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 00:11:00,337 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 00:11:00,337 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 00:11:00,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,347 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,361 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2024-10-24 00:11:00,362 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 00:11:00,362 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 00:11:00,362 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 00:11:00,363 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 00:11:00,370 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,370 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,374 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,383 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]. [2024-10-24 00:11:00,384 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,384 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,411 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,412 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,413 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 00:11:00,419 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 00:11:00,419 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 00:11:00,419 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 00:11:00,420 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (1/1) ... [2024-10-24 00:11:00,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:11:00,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:00,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 00:11:00,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 00:11:00,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 00:11:00,505 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-24 00:11:00,505 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-24 00:11:00,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 00:11:00,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 00:11:00,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 00:11:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 00:11:00,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 00:11:00,555 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 00:11:00,557 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 00:11:00,690 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-24 00:11:00,690 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 00:11:00,717 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 00:11:00,717 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 00:11:00,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:11:00 BoogieIcfgContainer [2024-10-24 00:11:00,718 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 00:11:00,722 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 00:11:00,722 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 00:11:00,725 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 00:11:00,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:11:00" (1/3) ... [2024-10-24 00:11:00,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561c9a2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:11:00, skipping insertion in model container [2024-10-24 00:11:00,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:11:00" (2/3) ... [2024-10-24 00:11:00,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561c9a2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:11:00, skipping insertion in model container [2024-10-24 00:11:00,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:11:00" (3/3) ... [2024-10-24 00:11:00,728 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2024-10-24 00:11:00,741 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 00:11:00,741 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 00:11:00,787 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 00:11:00,792 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;@61de7ed0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 00:11:00,793 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 00:11:00,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-24 00:11:00,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-24 00:11:00,803 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:00,803 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:00,804 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:00,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:00,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1865535902, now seen corresponding path program 1 times [2024-10-24 00:11:00,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:00,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609127541] [2024-10-24 00:11:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:00,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:00,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:11:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:00,994 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:11:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:00,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:11:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:11:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 00:11:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,011 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-24 00:11:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-24 00:11:01,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:01,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609127541] [2024-10-24 00:11:01,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609127541] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:11:01,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:11:01,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 00:11:01,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175567716] [2024-10-24 00:11:01,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:11:01,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 00:11:01,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 00:11:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:11:01,044 INFO L87 Difference]: Start difference. First operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-24 00:11:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:01,068 INFO L93 Difference]: Finished difference Result 62 states and 107 transitions. [2024-10-24 00:11:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 00:11:01,071 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-10-24 00:11:01,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:01,076 INFO L225 Difference]: With dead ends: 62 [2024-10-24 00:11:01,076 INFO L226 Difference]: Without dead ends: 30 [2024-10-24 00:11:01,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:11:01,081 INFO L432 NwaCegarLoop]: 41 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, 41 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 [2024-10-24 00:11:01,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:11:01,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-24 00:11:01,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-24 00:11:01,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-24 00:11:01,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-10-24 00:11:01,148 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 38 [2024-10-24 00:11:01,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:01,148 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-10-24 00:11:01,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-24 00:11:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-10-24 00:11:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-24 00:11:01,150 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:01,150 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:01,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 00:11:01,150 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:01,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash -279596905, now seen corresponding path program 1 times [2024-10-24 00:11:01,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:01,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449337437] [2024-10-24 00:11:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:01,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:11:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,352 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:11:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:11:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:11:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 00:11:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-24 00:11:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-24 00:11:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449337437] [2024-10-24 00:11:01,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449337437] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:01,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813143546] [2024-10-24 00:11:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:01,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:01,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:01,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:01,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 00:11:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:01,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 00:11:01,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-24 00:11:01,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:01,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813143546] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:01,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:11:01,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-10-24 00:11:01,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655254665] [2024-10-24 00:11:01,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:01,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 00:11:01,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 00:11:01,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:11:01,846 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-10-24 00:11:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:02,038 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2024-10-24 00:11:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 00:11:02,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 39 [2024-10-24 00:11:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:02,040 INFO L225 Difference]: With dead ends: 51 [2024-10-24 00:11:02,040 INFO L226 Difference]: Without dead ends: 43 [2024-10-24 00:11:02,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-10-24 00:11:02,041 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:02,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 207 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:11:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-24 00:11:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-10-24 00:11:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-24 00:11:02,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2024-10-24 00:11:02,054 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 39 [2024-10-24 00:11:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:02,055 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2024-10-24 00:11:02,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-10-24 00:11:02,055 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2024-10-24 00:11:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-24 00:11:02,056 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:02,056 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:02,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 00:11:02,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:02,258 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:02,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash -76887146, now seen corresponding path program 1 times [2024-10-24 00:11:02,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:02,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112397761] [2024-10-24 00:11:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:02,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:02,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514362129] [2024-10-24 00:11:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:02,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:02,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:02,292 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:02,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 00:11:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:11:02,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-24 00:11:02,373 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:11:02,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:02,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112397761] [2024-10-24 00:11:02,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:02,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514362129] [2024-10-24 00:11:02,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514362129] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:11:02,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:11:02,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:11:02,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989169685] [2024-10-24 00:11:02,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:11:02,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:11:02,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:02,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:11:02,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:11:02,377 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-24 00:11:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:02,426 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2024-10-24 00:11:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:11:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2024-10-24 00:11:02,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:02,427 INFO L225 Difference]: With dead ends: 61 [2024-10-24 00:11:02,427 INFO L226 Difference]: Without dead ends: 59 [2024-10-24 00:11:02,428 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:11:02,428 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:02,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 129 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:11:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-24 00:11:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2024-10-24 00:11:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-24 00:11:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2024-10-24 00:11:02,442 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2024-10-24 00:11:02,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:02,443 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2024-10-24 00:11:02,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-24 00:11:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2024-10-24 00:11:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-24 00:11:02,444 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:02,444 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-10-24 00:11:02,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 00:11:02,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-24 00:11:02,649 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:02,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 345761675, now seen corresponding path program 1 times [2024-10-24 00:11:02,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:02,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629556075] [2024-10-24 00:11:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:02,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:02,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451813415] [2024-10-24 00:11:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:02,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:02,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:02,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:02,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 00:11:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:02,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 00:11:02,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-24 00:11:02,829 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:11:02,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:02,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629556075] [2024-10-24 00:11:02,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:02,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451813415] [2024-10-24 00:11:02,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451813415] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:11:02,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:11:02,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:11:02,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664530679] [2024-10-24 00:11:02,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:11:02,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:11:02,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:02,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:11:02,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:11:02,834 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-24 00:11:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:02,879 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-10-24 00:11:02,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:11:02,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2024-10-24 00:11:02,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:02,883 INFO L225 Difference]: With dead ends: 57 [2024-10-24 00:11:02,884 INFO L226 Difference]: Without dead ends: 55 [2024-10-24 00:11:02,884 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:11:02,885 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:02,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:11:02,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-24 00:11:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-10-24 00:11:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-24 00:11:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2024-10-24 00:11:02,898 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 45 [2024-10-24 00:11:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:02,899 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2024-10-24 00:11:02,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-24 00:11:02,899 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2024-10-24 00:11:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-24 00:11:02,899 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:02,900 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:02,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 00:11:03,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:03,101 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:03,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:03,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2047387093, now seen corresponding path program 1 times [2024-10-24 00:11:03,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:03,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416832422] [2024-10-24 00:11:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:03,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:03,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851197240] [2024-10-24 00:11:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:03,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:03,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:03,131 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:03,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 00:11:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:03,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-24 00:11:03,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-24 00:11:03,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:03,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:03,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416832422] [2024-10-24 00:11:03,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:03,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851197240] [2024-10-24 00:11:03,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851197240] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:03,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:03,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-10-24 00:11:03,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355689142] [2024-10-24 00:11:03,428 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:03,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 00:11:03,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:03,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 00:11:03,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:11:03,430 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-24 00:11:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:03,529 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-10-24 00:11:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 00:11:03,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2024-10-24 00:11:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:03,531 INFO L225 Difference]: With dead ends: 61 [2024-10-24 00:11:03,531 INFO L226 Difference]: Without dead ends: 59 [2024-10-24 00:11:03,531 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-10-24 00:11:03,532 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:03,532 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:11:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-24 00:11:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-10-24 00:11:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-24 00:11:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2024-10-24 00:11:03,545 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 55 [2024-10-24 00:11:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:03,545 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2024-10-24 00:11:03,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-24 00:11:03,545 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2024-10-24 00:11:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-24 00:11:03,546 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:03,546 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1] [2024-10-24 00:11:03,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:03,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:03,751 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:03,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:03,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1705825109, now seen corresponding path program 1 times [2024-10-24 00:11:03,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:03,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373652671] [2024-10-24 00:11:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:03,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:03,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374500283] [2024-10-24 00:11:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:03,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:03,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:03,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:03,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 00:11:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:03,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 00:11:03,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-24 00:11:03,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-24 00:11:03,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:03,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373652671] [2024-10-24 00:11:03,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:03,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374500283] [2024-10-24 00:11:03,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374500283] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:03,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:11:03,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-10-24 00:11:03,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979895981] [2024-10-24 00:11:03,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:03,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 00:11:03,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 00:11:03,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-24 00:11:03,953 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-10-24 00:11:04,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:04,062 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2024-10-24 00:11:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 00:11:04,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 62 [2024-10-24 00:11:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:04,064 INFO L225 Difference]: With dead ends: 86 [2024-10-24 00:11:04,064 INFO L226 Difference]: Without dead ends: 84 [2024-10-24 00:11:04,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-24 00:11:04,065 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:04,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 212 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:11:04,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-24 00:11:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2024-10-24 00:11:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-24 00:11:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-10-24 00:11:04,074 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 62 [2024-10-24 00:11:04,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:04,075 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-10-24 00:11:04,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-10-24 00:11:04,075 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-10-24 00:11:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-24 00:11:04,075 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:04,075 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2024-10-24 00:11:04,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 00:11:04,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:04,276 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:04,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash 392643903, now seen corresponding path program 1 times [2024-10-24 00:11:04,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:04,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77438531] [2024-10-24 00:11:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:04,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:04,377 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:11:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:04,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:11:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:04,381 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:11:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:04,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:11:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:04,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 00:11:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:04,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-24 00:11:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:04,418 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-24 00:11:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:04,421 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-24 00:11:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:04,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-24 00:11:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:04,426 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-24 00:11:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-24 00:11:04,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:04,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77438531] [2024-10-24 00:11:04,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77438531] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:04,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782248915] [2024-10-24 00:11:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:04,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:04,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:04,432 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:04,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 00:11:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:04,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 00:11:04,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-24 00:11:04,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-24 00:11:04,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782248915] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:04,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:11:04,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-24 00:11:04,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489665724] [2024-10-24 00:11:04,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:04,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 00:11:04,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:04,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 00:11:04,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-24 00:11:04,584 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-24 00:11:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:04,724 INFO L93 Difference]: Finished difference Result 101 states and 141 transitions. [2024-10-24 00:11:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 00:11:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2024-10-24 00:11:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:04,728 INFO L225 Difference]: With dead ends: 101 [2024-10-24 00:11:04,728 INFO L226 Difference]: Without dead ends: 93 [2024-10-24 00:11:04,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-24 00:11:04,729 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 32 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:04,729 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 249 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:11:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-24 00:11:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2024-10-24 00:11:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-24 00:11:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2024-10-24 00:11:04,752 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 64 [2024-10-24 00:11:04,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:04,752 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2024-10-24 00:11:04,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-24 00:11:04,754 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2024-10-24 00:11:04,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-24 00:11:04,754 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:04,755 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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] [2024-10-24 00:11:04,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:04,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:04,956 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:04,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash -45785549, now seen corresponding path program 1 times [2024-10-24 00:11:04,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:04,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577222100] [2024-10-24 00:11:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:04,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:04,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75869572] [2024-10-24 00:11:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:04,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:04,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:04,986 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:04,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 00:11:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:05,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 00:11:05,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-24 00:11:05,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:05,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:05,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577222100] [2024-10-24 00:11:05,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:05,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75869572] [2024-10-24 00:11:05,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75869572] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:05,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:05,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-10-24 00:11:05,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940468306] [2024-10-24 00:11:05,200 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:05,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 00:11:05,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:05,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 00:11:05,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 00:11:05,202 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-24 00:11:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:05,310 INFO L93 Difference]: Finished difference Result 119 states and 168 transitions. [2024-10-24 00:11:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 00:11:05,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2024-10-24 00:11:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:05,312 INFO L225 Difference]: With dead ends: 119 [2024-10-24 00:11:05,312 INFO L226 Difference]: Without dead ends: 116 [2024-10-24 00:11:05,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-24 00:11:05,312 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:05,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 190 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:11:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-24 00:11:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-10-24 00:11:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 62 states have internal predecessors, (73), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-10-24 00:11:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2024-10-24 00:11:05,347 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 70 [2024-10-24 00:11:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:05,348 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2024-10-24 00:11:05,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-24 00:11:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2024-10-24 00:11:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-24 00:11:05,349 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:05,349 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1] [2024-10-24 00:11:05,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 00:11:05,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:05,550 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:05,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:05,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1519552206, now seen corresponding path program 2 times [2024-10-24 00:11:05,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:05,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859290] [2024-10-24 00:11:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:05,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:05,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052016869] [2024-10-24 00:11:05,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:11:05,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:05,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:05,572 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:05,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 00:11:05,623 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:11:05,623 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:05,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-24 00:11:05,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-24 00:11:05,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:05,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:05,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859290] [2024-10-24 00:11:05,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:05,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052016869] [2024-10-24 00:11:05,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052016869] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:05,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:05,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-10-24 00:11:05,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436466195] [2024-10-24 00:11:05,815 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:05,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 00:11:05,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:05,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 00:11:05,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-24 00:11:05,818 INFO L87 Difference]: Start difference. First operand 113 states and 161 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-24 00:11:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:05,941 INFO L93 Difference]: Finished difference Result 125 states and 171 transitions. [2024-10-24 00:11:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 00:11:05,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2024-10-24 00:11:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:05,944 INFO L225 Difference]: With dead ends: 125 [2024-10-24 00:11:05,944 INFO L226 Difference]: Without dead ends: 123 [2024-10-24 00:11:05,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:11:05,946 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:05,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 207 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:11:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-24 00:11:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2024-10-24 00:11:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 45 states have call successors, (45), 9 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-10-24 00:11:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2024-10-24 00:11:05,968 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 75 [2024-10-24 00:11:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:05,969 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2024-10-24 00:11:05,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-24 00:11:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2024-10-24 00:11:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-10-24 00:11:05,971 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:05,971 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1, 1, 1] [2024-10-24 00:11:05,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:06,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-24 00:11:06,172 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:06,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:06,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1881497901, now seen corresponding path program 3 times [2024-10-24 00:11:06,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:06,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695543851] [2024-10-24 00:11:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:06,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:06,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230916548] [2024-10-24 00:11:06,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:11:06,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:06,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:06,191 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:06,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 00:11:06,250 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 00:11:06,250 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:06,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-24 00:11:06,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-10-24 00:11:07,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:07,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:07,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695543851] [2024-10-24 00:11:07,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:07,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230916548] [2024-10-24 00:11:07,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230916548] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:07,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:07,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-24 00:11:07,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145639199] [2024-10-24 00:11:07,175 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:07,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 00:11:07,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:07,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 00:11:07,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-10-24 00:11:07,177 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-24 00:11:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:07,605 INFO L93 Difference]: Finished difference Result 133 states and 177 transitions. [2024-10-24 00:11:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 00:11:07,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2024-10-24 00:11:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:07,607 INFO L225 Difference]: With dead ends: 133 [2024-10-24 00:11:07,607 INFO L226 Difference]: Without dead ends: 131 [2024-10-24 00:11:07,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-10-24 00:11:07,608 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:07,608 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 242 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 00:11:07,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-24 00:11:07,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-10-24 00:11:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 74 states have internal predecessors, (85), 45 states have call successors, (45), 11 states have call predecessors, (45), 11 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-10-24 00:11:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 173 transitions. [2024-10-24 00:11:07,633 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 173 transitions. Word has length 80 [2024-10-24 00:11:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:07,633 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 173 transitions. [2024-10-24 00:11:07,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-24 00:11:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 173 transitions. [2024-10-24 00:11:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-10-24 00:11:07,637 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:07,637 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:07,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:07,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-24 00:11:07,838 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:07,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:07,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1305329662, now seen corresponding path program 1 times [2024-10-24 00:11:07,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:07,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509528065] [2024-10-24 00:11:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:07,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:07,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969878694] [2024-10-24 00:11:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:07,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:07,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:07,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:07,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 00:11:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:07,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-24 00:11:07,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-10-24 00:11:08,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-10-24 00:11:09,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:09,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509528065] [2024-10-24 00:11:09,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:09,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969878694] [2024-10-24 00:11:09,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969878694] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:09,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:11:09,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-24 00:11:09,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311456937] [2024-10-24 00:11:09,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:09,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 00:11:09,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:09,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 00:11:09,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-24 00:11:09,079 INFO L87 Difference]: Start difference. First operand 129 states and 173 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-10-24 00:11:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:12,094 INFO L93 Difference]: Finished difference Result 229 states and 336 transitions. [2024-10-24 00:11:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-24 00:11:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 86 [2024-10-24 00:11:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:12,097 INFO L225 Difference]: With dead ends: 229 [2024-10-24 00:11:12,097 INFO L226 Difference]: Without dead ends: 225 [2024-10-24 00:11:12,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-10-24 00:11:12,101 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 74 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:12,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 494 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-10-24 00:11:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-10-24 00:11:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-10-24 00:11:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 114 states have (on average 1.236842105263158) internal successors, (141), 117 states have internal predecessors, (141), 94 states have call successors, (94), 13 states have call predecessors, (94), 13 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2024-10-24 00:11:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 327 transitions. [2024-10-24 00:11:12,165 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 327 transitions. Word has length 86 [2024-10-24 00:11:12,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:12,165 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 327 transitions. [2024-10-24 00:11:12,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-10-24 00:11:12,165 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 327 transitions. [2024-10-24 00:11:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-24 00:11:12,166 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:12,166 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 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] [2024-10-24 00:11:12,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:12,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-24 00:11:12,371 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:12,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:12,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1470837899, now seen corresponding path program 4 times [2024-10-24 00:11:12,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:12,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976632762] [2024-10-24 00:11:12,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:12,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:11:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,456 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:11:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:11:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:11:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,462 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 00:11:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,464 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-24 00:11:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,466 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-24 00:11:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-24 00:11:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-24 00:11:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-24 00:11:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,472 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-24 00:11:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,476 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-24 00:11:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-24 00:11:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-24 00:11:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-10-24 00:11:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-10-24 00:11:12,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:12,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976632762] [2024-10-24 00:11:12,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976632762] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:11:12,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:11:12,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:11:12,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408946434] [2024-10-24 00:11:12,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:11:12,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:11:12,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:11:12,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:11:12,491 INFO L87 Difference]: Start difference. First operand 222 states and 327 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-24 00:11:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:12,590 INFO L93 Difference]: Finished difference Result 275 states and 403 transitions. [2024-10-24 00:11:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 00:11:12,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2024-10-24 00:11:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:12,592 INFO L225 Difference]: With dead ends: 275 [2024-10-24 00:11:12,593 INFO L226 Difference]: Without dead ends: 201 [2024-10-24 00:11:12,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-24 00:11:12,595 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:12,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 166 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:11:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-10-24 00:11:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-10-24 00:11:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 97 states have (on average 1.175257731958763) internal successors, (114), 100 states have internal predecessors, (114), 78 states have call successors, (78), 13 states have call predecessors, (78), 13 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2024-10-24 00:11:12,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 268 transitions. [2024-10-24 00:11:12,642 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 268 transitions. Word has length 95 [2024-10-24 00:11:12,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:12,643 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 268 transitions. [2024-10-24 00:11:12,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-24 00:11:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 268 transitions. [2024-10-24 00:11:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-10-24 00:11:12,644 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:12,645 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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] [2024-10-24 00:11:12,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-24 00:11:12,645 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:12,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:12,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1556724626, now seen corresponding path program 1 times [2024-10-24 00:11:12,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:12,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952660232] [2024-10-24 00:11:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:12,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:12,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667519903] [2024-10-24 00:11:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:12,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:12,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:12,670 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:12,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 00:11:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:12,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-24 00:11:12,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 74 proven. 35 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-10-24 00:11:13,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:19,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:19,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952660232] [2024-10-24 00:11:19,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:19,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667519903] [2024-10-24 00:11:19,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667519903] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:19,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:19,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-24 00:11:19,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068162768] [2024-10-24 00:11:19,454 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:19,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 00:11:19,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:19,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 00:11:19,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=461, Unknown=1, NotChecked=0, Total=552 [2024-10-24 00:11:19,455 INFO L87 Difference]: Start difference. First operand 189 states and 268 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-24 00:11:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:19,924 INFO L93 Difference]: Finished difference Result 201 states and 278 transitions. [2024-10-24 00:11:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 00:11:19,925 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 102 [2024-10-24 00:11:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:19,926 INFO L225 Difference]: With dead ends: 201 [2024-10-24 00:11:19,926 INFO L226 Difference]: Without dead ends: 199 [2024-10-24 00:11:19,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=140, Invalid=671, Unknown=1, NotChecked=0, Total=812 [2024-10-24 00:11:19,927 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:19,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 194 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 00:11:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-10-24 00:11:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-10-24 00:11:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 106 states have internal predecessors, (120), 78 states have call successors, (78), 15 states have call predecessors, (78), 15 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2024-10-24 00:11:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 274 transitions. [2024-10-24 00:11:19,968 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 274 transitions. Word has length 102 [2024-10-24 00:11:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:19,969 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 274 transitions. [2024-10-24 00:11:19,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-24 00:11:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 274 transitions. [2024-10-24 00:11:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-10-24 00:11:19,970 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:19,970 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-10-24 00:11:19,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:20,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-24 00:11:20,175 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:20,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:20,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1903041589, now seen corresponding path program 1 times [2024-10-24 00:11:20,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:20,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943960570] [2024-10-24 00:11:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:20,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,255 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:11:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,257 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:11:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,259 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:11:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,260 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:11:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,261 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 00:11:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,262 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-24 00:11:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-24 00:11:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,264 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-24 00:11:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,265 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-24 00:11:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,267 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-24 00:11:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-24 00:11:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,270 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-24 00:11:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,273 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-24 00:11:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-24 00:11:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,277 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-10-24 00:11:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,279 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-10-24 00:11:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-10-24 00:11:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-10-24 00:11:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-10-24 00:11:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-10-24 00:11:20,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:20,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943960570] [2024-10-24 00:11:20,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943960570] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:20,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022489844] [2024-10-24 00:11:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:20,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:20,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:20,290 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:20,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 00:11:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:20,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:11:20,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-10-24 00:11:20,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-10-24 00:11:20,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022489844] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:20,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:11:20,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-10-24 00:11:20,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177640644] [2024-10-24 00:11:20,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:20,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 00:11:20,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 00:11:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-24 00:11:20,436 INFO L87 Difference]: Start difference. First operand 197 states and 274 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2024-10-24 00:11:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:20,616 INFO L93 Difference]: Finished difference Result 223 states and 313 transitions. [2024-10-24 00:11:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 00:11:20,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 116 [2024-10-24 00:11:20,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:20,618 INFO L225 Difference]: With dead ends: 223 [2024-10-24 00:11:20,618 INFO L226 Difference]: Without dead ends: 211 [2024-10-24 00:11:20,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 267 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:11:20,619 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 17 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:20,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 318 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:11:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-10-24 00:11:20,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 192. [2024-10-24 00:11:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 100 states have (on average 1.16) internal successors, (116), 102 states have internal predecessors, (116), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2024-10-24 00:11:20,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 268 transitions. [2024-10-24 00:11:20,661 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 268 transitions. Word has length 116 [2024-10-24 00:11:20,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:20,661 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 268 transitions. [2024-10-24 00:11:20,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2024-10-24 00:11:20,661 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 268 transitions. [2024-10-24 00:11:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-10-24 00:11:20,662 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:20,662 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:20,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:20,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-24 00:11:20,863 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:20,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:20,863 INFO L85 PathProgramCache]: Analyzing trace with hash -956526070, now seen corresponding path program 2 times [2024-10-24 00:11:20,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:20,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348345281] [2024-10-24 00:11:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:20,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:20,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532350750] [2024-10-24 00:11:20,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:11:20,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:20,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:20,893 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:20,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 00:11:20,953 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:11:20,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:20,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-24 00:11:20,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 61 proven. 50 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-10-24 00:11:21,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-10-24 00:11:21,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:21,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348345281] [2024-10-24 00:11:21,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:21,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532350750] [2024-10-24 00:11:21,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532350750] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:21,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:11:21,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-10-24 00:11:21,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932196759] [2024-10-24 00:11:21,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:21,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 00:11:21,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:21,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 00:11:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-10-24 00:11:21,576 INFO L87 Difference]: Start difference. First operand 192 states and 268 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2024-10-24 00:11:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:23,533 INFO L93 Difference]: Finished difference Result 226 states and 314 transitions. [2024-10-24 00:11:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 00:11:23,534 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 117 [2024-10-24 00:11:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:23,537 INFO L225 Difference]: With dead ends: 226 [2024-10-24 00:11:23,537 INFO L226 Difference]: Without dead ends: 223 [2024-10-24 00:11:23,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-10-24 00:11:23,538 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 59 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:23,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 426 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-24 00:11:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-10-24 00:11:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 165. [2024-10-24 00:11:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 89 states have internal predecessors, (102), 63 states have call successors, (63), 13 states have call predecessors, (63), 13 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2024-10-24 00:11:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 227 transitions. [2024-10-24 00:11:23,581 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 227 transitions. Word has length 117 [2024-10-24 00:11:23,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:23,582 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 227 transitions. [2024-10-24 00:11:23,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2024-10-24 00:11:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 227 transitions. [2024-10-24 00:11:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-10-24 00:11:23,583 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:23,583 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:23,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:23,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-24 00:11:23,787 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:23,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:23,788 INFO L85 PathProgramCache]: Analyzing trace with hash 457852880, now seen corresponding path program 3 times [2024-10-24 00:11:23,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:23,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236552794] [2024-10-24 00:11:23,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:23,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:23,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193825419] [2024-10-24 00:11:23,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:11:23,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:23,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:23,815 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:23,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 00:11:23,880 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-24 00:11:23,880 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:23,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-24 00:11:23,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-10-24 00:11:24,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:26,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236552794] [2024-10-24 00:11:26,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193825419] [2024-10-24 00:11:26,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193825419] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:26,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:26,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-10-24 00:11:26,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459264650] [2024-10-24 00:11:26,472 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:26,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 00:11:26,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:26,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 00:11:26,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-10-24 00:11:26,472 INFO L87 Difference]: Start difference. First operand 165 states and 227 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-24 00:11:26,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:26,793 INFO L93 Difference]: Finished difference Result 203 states and 276 transitions. [2024-10-24 00:11:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 00:11:26,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 119 [2024-10-24 00:11:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:26,795 INFO L225 Difference]: With dead ends: 203 [2024-10-24 00:11:26,795 INFO L226 Difference]: Without dead ends: 201 [2024-10-24 00:11:26,795 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-10-24 00:11:26,795 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 22 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:26,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 359 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:11:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-10-24 00:11:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2024-10-24 00:11:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 106 states have (on average 1.150943396226415) internal successors, (122), 107 states have internal predecessors, (122), 75 states have call successors, (75), 16 states have call predecessors, (75), 16 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-10-24 00:11:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 271 transitions. [2024-10-24 00:11:26,848 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 271 transitions. Word has length 119 [2024-10-24 00:11:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:26,848 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 271 transitions. [2024-10-24 00:11:26,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-24 00:11:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 271 transitions. [2024-10-24 00:11:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-10-24 00:11:26,849 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:26,849 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:26,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-24 00:11:27,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:27,050 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:27,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:27,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2126175913, now seen corresponding path program 4 times [2024-10-24 00:11:27,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:27,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004865515] [2024-10-24 00:11:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:27,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:27,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615576505] [2024-10-24 00:11:27,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:11:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:27,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:27,075 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:27,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 00:11:27,134 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:11:27,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:27,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-24 00:11:27,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 57 proven. 47 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-10-24 00:11:27,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:28,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:28,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004865515] [2024-10-24 00:11:28,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:28,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615576505] [2024-10-24 00:11:28,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615576505] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:28,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:28,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-24 00:11:28,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340193998] [2024-10-24 00:11:28,922 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:28,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 00:11:28,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:28,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 00:11:28,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-10-24 00:11:28,923 INFO L87 Difference]: Start difference. First operand 198 states and 271 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-24 00:11:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:29,539 INFO L93 Difference]: Finished difference Result 261 states and 358 transitions. [2024-10-24 00:11:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 00:11:29,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 122 [2024-10-24 00:11:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:29,541 INFO L225 Difference]: With dead ends: 261 [2024-10-24 00:11:29,541 INFO L226 Difference]: Without dead ends: 259 [2024-10-24 00:11:29,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2024-10-24 00:11:29,542 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 24 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:29,542 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 467 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 00:11:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-10-24 00:11:29,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 256. [2024-10-24 00:11:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 136 states have (on average 1.1470588235294117) internal successors, (156), 137 states have internal predecessors, (156), 99 states have call successors, (99), 20 states have call predecessors, (99), 20 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-10-24 00:11:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 353 transitions. [2024-10-24 00:11:29,617 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 353 transitions. Word has length 122 [2024-10-24 00:11:29,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:29,618 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 353 transitions. [2024-10-24 00:11:29,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-24 00:11:29,618 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 353 transitions. [2024-10-24 00:11:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-10-24 00:11:29,618 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:29,618 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:29,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:29,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-24 00:11:29,819 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:29,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash 71118609, now seen corresponding path program 5 times [2024-10-24 00:11:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:29,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345853444] [2024-10-24 00:11:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:29,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:29,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886810244] [2024-10-24 00:11:29,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 00:11:29,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:29,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:29,835 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:29,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 00:11:29,931 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-24 00:11:29,931 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:29,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-24 00:11:29,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 88 proven. 70 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2024-10-24 00:11:30,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:12:09,526 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)