./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested3-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/nested3-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 14:12:13,577 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 14:12:13,647 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 14:12:13,654 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 14:12:13,655 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 14:12:13,686 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 14:12:13,687 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 14:12:13,687 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 14:12:13,689 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 14:12:13,690 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 14:12:13,691 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 14:12:13,691 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 14:12:13,692 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 14:12:13,692 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 14:12:13,693 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 14:12:13,693 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 14:12:13,694 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 14:12:13,694 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 14:12:13,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 14:12:13,695 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 14:12:13,695 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 14:12:13,699 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 14:12:13,699 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 14:12:13,700 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 14:12:13,701 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 14:12:13,701 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 14:12:13,701 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 14:12:13,702 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 14:12:13,702 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 14:12:13,702 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 14:12:13,702 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 14:12:13,703 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 14:12:13,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:12:13,704 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 14:12:13,705 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 14:12:13,705 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 14:12:13,705 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 14:12:13,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 14:12:13,706 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 14:12:13,706 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 14:12:13,706 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 14:12:13,707 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 14:12:13,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e [2024-11-08 14:12:13,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 14:12:14,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 14:12:14,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 14:12:14,007 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 14:12:14,007 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 14:12:14,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2024-11-08 14:12:15,498 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 14:12:15,671 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 14:12:15,672 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2024-11-08 14:12:15,679 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad255cd50/7ef9e97e124844a1b1b7a691e7a9bf9e/FLAG1ae0dcdee [2024-11-08 14:12:15,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad255cd50/7ef9e97e124844a1b1b7a691e7a9bf9e [2024-11-08 14:12:15,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 14:12:15,706 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 14:12:15,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 14:12:15,710 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 14:12:15,715 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 14:12:15,716 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:15,717 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e2e2ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15, skipping insertion in model container [2024-11-08 14:12:15,717 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:15,738 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 14:12:15,923 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2024-11-08 14:12:15,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:12:15,949 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 14:12:15,961 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2024-11-08 14:12:15,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:12:15,983 INFO L204 MainTranslator]: Completed translation [2024-11-08 14:12:15,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15 WrapperNode [2024-11-08 14:12:15,984 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 14:12:15,985 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 14:12:15,986 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 14:12:15,986 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 14:12:15,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:15,999 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:16,013 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2024-11-08 14:12:16,014 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 14:12:16,014 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 14:12:16,015 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 14:12:16,015 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 14:12:16,024 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:16,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:16,026 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:16,036 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]. [2024-11-08 14:12:16,036 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:16,036 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:16,039 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:16,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:16,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:16,043 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:16,045 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 14:12:16,045 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 14:12:16,046 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 14:12:16,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 14:12:16,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (1/1) ... [2024-11-08 14:12:16,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:12:16,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:12:16,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 14:12:16,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 14:12:16,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 14:12:16,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 14:12:16,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 14:12:16,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 14:12:16,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 14:12:16,139 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 14:12:16,207 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 14:12:16,211 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 14:12:16,354 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-08 14:12:16,354 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 14:12:16,370 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 14:12:16,370 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 14:12:16,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:12:16 BoogieIcfgContainer [2024-11-08 14:12:16,371 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 14:12:16,374 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 14:12:16,374 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 14:12:16,378 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 14:12:16,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 02:12:15" (1/3) ... [2024-11-08 14:12:16,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b87909d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:12:16, skipping insertion in model container [2024-11-08 14:12:16,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:12:15" (2/3) ... [2024-11-08 14:12:16,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b87909d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:12:16, skipping insertion in model container [2024-11-08 14:12:16,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:12:16" (3/3) ... [2024-11-08 14:12:16,381 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2024-11-08 14:12:16,400 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 14:12:16,400 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 14:12:16,462 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 14:12:16,469 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;@346791a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 14:12:16,469 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 14:12:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 14:12:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-08 14:12:16,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:12:16,482 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:12:16,483 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:12:16,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:12:16,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1810304921, now seen corresponding path program 1 times [2024-11-08 14:12:16,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:12:16,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694917234] [2024-11-08 14:12:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:12:16,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:12:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:12:16,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:12:16,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694917234] [2024-11-08 14:12:16,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694917234] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:12:16,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:12:16,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 14:12:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879368858] [2024-11-08 14:12:16,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:12:16,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 14:12:16,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:12:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 14:12:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 14:12:16,778 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:12:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:12:16,819 INFO L93 Difference]: Finished difference Result 45 states and 74 transitions. [2024-11-08 14:12:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 14:12:16,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-08 14:12:16,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:12:16,828 INFO L225 Difference]: With dead ends: 45 [2024-11-08 14:12:16,828 INFO L226 Difference]: Without dead ends: 23 [2024-11-08 14:12:16,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 14:12:16,833 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:12:16,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 43 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:12:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-08 14:12:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2024-11-08 14:12:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:12:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2024-11-08 14:12:16,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2024-11-08 14:12:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:12:16,863 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2024-11-08 14:12:16,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:12:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2024-11-08 14:12:16,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-08 14:12:16,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:12:16,864 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:12:16,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 14:12:16,864 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:12:16,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:12:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash 300961951, now seen corresponding path program 1 times [2024-11-08 14:12:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:12:16,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720022897] [2024-11-08 14:12:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:12:16,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:12:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:12:16,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:12:16,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720022897] [2024-11-08 14:12:16,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720022897] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:12:16,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:12:16,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 14:12:16,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017577202] [2024-11-08 14:12:16,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:12:16,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 14:12:16,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:12:16,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 14:12:16,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 14:12:16,971 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:12:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:12:16,987 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2024-11-08 14:12:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 14:12:16,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-08 14:12:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:12:16,988 INFO L225 Difference]: With dead ends: 35 [2024-11-08 14:12:16,988 INFO L226 Difference]: Without dead ends: 21 [2024-11-08 14:12:16,989 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 14:12:16,990 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:12:16,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:12:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-08 14:12:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2024-11-08 14:12:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:12:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-08 14:12:16,999 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2024-11-08 14:12:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:12:16,999 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-08 14:12:17,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:12:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-08 14:12:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-08 14:12:17,002 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:12:17,002 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:12:17,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 14:12:17,002 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:12:17,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:12:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash 766069286, now seen corresponding path program 1 times [2024-11-08 14:12:17,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:12:17,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67847401] [2024-11-08 14:12:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:12:17,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:12:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:12:17,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:12:17,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67847401] [2024-11-08 14:12:17,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67847401] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:12:17,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:12:17,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 14:12:17,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100723874] [2024-11-08 14:12:17,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:12:17,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 14:12:17,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:12:17,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 14:12:17,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 14:12:17,094 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:12:17,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:12:17,105 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-11-08 14:12:17,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 14:12:17,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-08 14:12:17,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:12:17,106 INFO L225 Difference]: With dead ends: 34 [2024-11-08 14:12:17,106 INFO L226 Difference]: Without dead ends: 19 [2024-11-08 14:12:17,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 14:12:17,108 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:12:17,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:12:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-08 14:12:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-08 14:12:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:12:17,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-11-08 14:12:17,115 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2024-11-08 14:12:17,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:12:17,116 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-11-08 14:12:17,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:12:17,116 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-11-08 14:12:17,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 14:12:17,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:12:17,117 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:12:17,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 14:12:17,117 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:12:17,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:12:17,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1993625471, now seen corresponding path program 1 times [2024-11-08 14:12:17,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:12:17,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615422473] [2024-11-08 14:12:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:12:17,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:12:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:12:17,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:12:17,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615422473] [2024-11-08 14:12:17,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615422473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:12:17,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178234504] [2024-11-08 14:12:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:12:17,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:17,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:12:17,240 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:12:17,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 14:12:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:17,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 14:12:17,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:12:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:12:17,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:12:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:12:17,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178234504] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:12:17,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:12:17,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2024-11-08 14:12:17,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552712293] [2024-11-08 14:12:17,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:12:17,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 14:12:17,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:12:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 14:12:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-08 14:12:17,469 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:12:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:12:17,599 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2024-11-08 14:12:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 14:12:17,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 14:12:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:12:17,602 INFO L225 Difference]: With dead ends: 58 [2024-11-08 14:12:17,602 INFO L226 Difference]: Without dead ends: 42 [2024-11-08 14:12:17,603 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:12:17,604 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:12:17,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 128 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:12:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-08 14:12:17,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2024-11-08 14:12:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 14:12:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-11-08 14:12:17,619 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 10 [2024-11-08 14:12:17,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:12:17,620 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-11-08 14:12:17,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:12:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-11-08 14:12:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-08 14:12:17,622 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:12:17,622 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:12:17,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 14:12:17,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:17,827 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:12:17,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:12:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash 775784678, now seen corresponding path program 2 times [2024-11-08 14:12:17,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:12:17,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463766853] [2024-11-08 14:12:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:12:17,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:12:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:12:17,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:12:17,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463766853] [2024-11-08 14:12:17,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463766853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:12:17,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169898433] [2024-11-08 14:12:17,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:12:17,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:17,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:12:17,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:12:17,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 14:12:18,009 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:12:18,010 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:12:18,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 14:12:18,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:12:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:12:18,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:12:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:12:18,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169898433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:12:18,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:12:18,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-08 14:12:18,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147702841] [2024-11-08 14:12:18,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:12:18,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 14:12:18,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:12:18,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 14:12:18,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:12:18,166 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:12:18,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:12:18,367 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2024-11-08 14:12:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 14:12:18,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-08 14:12:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:12:18,371 INFO L225 Difference]: With dead ends: 52 [2024-11-08 14:12:18,372 INFO L226 Difference]: Without dead ends: 28 [2024-11-08 14:12:18,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2024-11-08 14:12:18,373 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:12:18,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 104 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:12:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-08 14:12:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-08 14:12:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:12:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-08 14:12:18,379 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 13 [2024-11-08 14:12:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:12:18,379 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-08 14:12:18,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:12:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-08 14:12:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-08 14:12:18,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:12:18,380 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:12:18,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 14:12:18,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:18,581 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:12:18,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:12:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2064634630, now seen corresponding path program 3 times [2024-11-08 14:12:18,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:12:18,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334252137] [2024-11-08 14:12:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:12:18,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:12:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:12:18,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:12:18,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334252137] [2024-11-08 14:12:18,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334252137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:12:18,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509666633] [2024-11-08 14:12:18,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:12:18,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:18,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:12:18,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:12:18,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 14:12:18,933 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 14:12:18,933 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:12:18,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 14:12:18,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:12:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-08 14:12:19,195 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:12:19,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509666633] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:12:19,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:12:19,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2024-11-08 14:12:19,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881073451] [2024-11-08 14:12:19,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:12:19,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 14:12:19,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:12:19,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 14:12:19,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-11-08 14:12:19,199 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:12:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:12:19,305 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2024-11-08 14:12:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 14:12:19,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-08 14:12:19,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:12:19,306 INFO L225 Difference]: With dead ends: 35 [2024-11-08 14:12:19,308 INFO L226 Difference]: Without dead ends: 33 [2024-11-08 14:12:19,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-08 14:12:19,309 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:12:19,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:12:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-08 14:12:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-11-08 14:12:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:12:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-11-08 14:12:19,326 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2024-11-08 14:12:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:12:19,326 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-11-08 14:12:19,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:12:19,327 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-11-08 14:12:19,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 14:12:19,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:12:19,327 INFO L215 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:12:19,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 14:12:19,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:19,529 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:12:19,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:12:19,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1529129531, now seen corresponding path program 1 times [2024-11-08 14:12:19,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:12:19,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128721025] [2024-11-08 14:12:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:12:19,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:12:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:19,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 14:12:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:12:19,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:12:19,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128721025] [2024-11-08 14:12:19,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128721025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:12:19,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640326402] [2024-11-08 14:12:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:12:19,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:19,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:12:19,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:12:19,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 14:12:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:19,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 14:12:19,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:12:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 14:12:19,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:12:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 14:12:20,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640326402] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:12:20,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:12:20,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2024-11-08 14:12:20,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551214646] [2024-11-08 14:12:20,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:12:20,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 14:12:20,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:12:20,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 14:12:20,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-08 14:12:20,057 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 14:12:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:12:20,987 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2024-11-08 14:12:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-08 14:12:20,987 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2024-11-08 14:12:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:12:20,988 INFO L225 Difference]: With dead ends: 107 [2024-11-08 14:12:20,988 INFO L226 Difference]: Without dead ends: 78 [2024-11-08 14:12:20,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2024-11-08 14:12:20,991 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:12:20,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 115 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:12:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-08 14:12:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-08 14:12:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 70 states have internal predecessors, (76), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-08 14:12:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2024-11-08 14:12:21,011 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 26 [2024-11-08 14:12:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:12:21,012 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2024-11-08 14:12:21,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 14:12:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2024-11-08 14:12:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-08 14:12:21,014 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:12:21,014 INFO L215 NwaCegarLoop]: trace histogram [44, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:12:21,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 14:12:21,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:21,219 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:12:21,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:12:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1271803231, now seen corresponding path program 2 times [2024-11-08 14:12:21,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:12:21,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242749516] [2024-11-08 14:12:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:12:21,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:12:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:21,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-08 14:12:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:21,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-08 14:12:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:21,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-08 14:12:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:21,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-11-08 14:12:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-11-08 14:12:21,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:12:21,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242749516] [2024-11-08 14:12:21,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242749516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:12:21,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634979508] [2024-11-08 14:12:21,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:12:21,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:21,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:12:21,625 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:12:21,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 14:12:21,706 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:12:21,706 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:12:21,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 14:12:21,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:12:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 8 proven. 931 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-11-08 14:12:21,961 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:12:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 43 proven. 896 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-11-08 14:12:22,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634979508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:12:22,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:12:22,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2024-11-08 14:12:22,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415055087] [2024-11-08 14:12:22,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:12:22,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-08 14:12:22,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:12:22,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-08 14:12:22,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 14:12:22,432 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 14:12:26,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:12:26,772 INFO L93 Difference]: Finished difference Result 253 states and 299 transitions. [2024-11-08 14:12:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2024-11-08 14:12:26,773 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 84 [2024-11-08 14:12:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:12:26,775 INFO L225 Difference]: With dead ends: 253 [2024-11-08 14:12:26,775 INFO L226 Difference]: Without dead ends: 178 [2024-11-08 14:12:26,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8825 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3165, Invalid=21327, Unknown=0, NotChecked=0, Total=24492 [2024-11-08 14:12:26,785 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 92 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 14:12:26,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 415 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 14:12:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-08 14:12:26,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-11-08 14:12:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 164 states have internal predecessors, (176), 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) [2024-11-08 14:12:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 199 transitions. [2024-11-08 14:12:26,817 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 199 transitions. Word has length 84 [2024-11-08 14:12:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:12:26,817 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 199 transitions. [2024-11-08 14:12:26,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 14:12:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 199 transitions. [2024-11-08 14:12:26,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-08 14:12:26,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:12:26,821 INFO L215 NwaCegarLoop]: trace histogram [120, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:12:26,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 14:12:27,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:27,022 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:12:27,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:12:27,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1147001079, now seen corresponding path program 3 times [2024-11-08 14:12:27,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:12:27,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592272607] [2024-11-08 14:12:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:12:27,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:12:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:27,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-08 14:12:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:27,750 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-08 14:12:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:27,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-11-08 14:12:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:27,755 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-11-08 14:12:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:27,757 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-11-08 14:12:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:27,759 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-11-08 14:12:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:27,760 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2024-11-08 14:12:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:27,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2024-11-08 14:12:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:27,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2024-11-08 14:12:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:27,765 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2024-11-08 14:12:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1551 proven. 78 refuted. 0 times theorem prover too weak. 7101 trivial. 0 not checked. [2024-11-08 14:12:27,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:12:27,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592272607] [2024-11-08 14:12:27,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592272607] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:12:27,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395246264] [2024-11-08 14:12:27,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:12:27,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:27,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:12:27,773 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) [2024-11-08 14:12:27,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 14:12:27,882 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-08 14:12:27,882 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:12:27,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-08 14:12:27,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:12:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1531 proven. 78 refuted. 0 times theorem prover too weak. 7121 trivial. 0 not checked. [2024-11-08 14:12:27,968 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:12:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1551 proven. 78 refuted. 0 times theorem prover too weak. 7101 trivial. 0 not checked. [2024-11-08 14:12:28,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395246264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:12:28,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:12:28,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-11-08 14:12:28,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979038029] [2024-11-08 14:12:28,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:12:28,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 14:12:28,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:12:28,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 14:12:28,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2024-11-08 14:12:28,302 INFO L87 Difference]: Start difference. First operand 178 states and 199 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:12:33,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:12:33,067 INFO L93 Difference]: Finished difference Result 493 states and 675 transitions. [2024-11-08 14:12:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-08 14:12:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 208 [2024-11-08 14:12:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:12:33,070 INFO L225 Difference]: With dead ends: 493 [2024-11-08 14:12:33,070 INFO L226 Difference]: Without dead ends: 318 [2024-11-08 14:12:33,071 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=598, Invalid=1042, Unknown=0, NotChecked=0, Total=1640 [2024-11-08 14:12:33,072 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:12:33,072 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 257 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:12:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2024-11-08 14:12:33,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2024-11-08 14:12:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 303 states have (on average 1.0429042904290429) internal successors, (316), 304 states have internal predecessors, (316), 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) [2024-11-08 14:12:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 339 transitions. [2024-11-08 14:12:33,124 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 339 transitions. Word has length 208 [2024-11-08 14:12:33,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:12:33,124 INFO L471 AbstractCegarLoop]: Abstraction has 318 states and 339 transitions. [2024-11-08 14:12:33,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:12:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 339 transitions. [2024-11-08 14:12:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2024-11-08 14:12:33,132 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:12:33,133 INFO L215 NwaCegarLoop]: trace histogram [260, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:12:33,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 14:12:33,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:33,334 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:12:33,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:12:33,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2942903, now seen corresponding path program 4 times [2024-11-08 14:12:33,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:12:33,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394382346] [2024-11-08 14:12:33,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:12:33,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:12:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:35,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-08 14:12:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:35,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-08 14:12:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:35,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-11-08 14:12:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:35,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-11-08 14:12:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:35,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-11-08 14:12:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:35,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2024-11-08 14:12:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:35,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2024-11-08 14:12:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:35,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2024-11-08 14:12:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:35,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2024-11-08 14:12:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:35,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2024-11-08 14:12:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:12:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 6591 proven. 351 refuted. 0 times theorem prover too weak. 29718 trivial. 0 not checked. [2024-11-08 14:12:35,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:12:35,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394382346] [2024-11-08 14:12:35,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394382346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:12:35,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214500245] [2024-11-08 14:12:35,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 14:12:35,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:12:35,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:12:35,229 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) [2024-11-08 14:12:35,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 14:12:35,446 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 14:12:35,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:12:35,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-08 14:12:35,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:12:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 20 proven. 33181 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2024-11-08 14:12:36,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:12:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 196 proven. 33005 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2024-11-08 14:12:37,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214500245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:12:37,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:12:37,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 73 [2024-11-08 14:12:37,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194075582] [2024-11-08 14:12:37,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:12:37,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-08 14:12:37,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:12:37,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-08 14:12:37,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=4559, Unknown=0, NotChecked=0, Total=5256 [2024-11-08 14:12:37,911 INFO L87 Difference]: Start difference. First operand 318 states and 339 transitions. Second operand has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21)