./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de62.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/in-de62.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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 17:55:38,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 17:55:38,163 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 17:55:38,167 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 17:55:38,169 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 17:55:38,184 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 17:55:38,184 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 17:55:38,184 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 17:55:38,185 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 17:55:38,185 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 17:55:38,185 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 17:55:38,185 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 17:55:38,185 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 17:55:38,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 17:55:38,186 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 17:55:38,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 17:55:38,186 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 17:55:38,186 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 17:55:38,186 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 17:55:38,186 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 17:55:38,187 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 17:55:38,187 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 17:55:38,187 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 17:55:38,187 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 17:55:38,187 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 17:55:38,187 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 17:55:38,187 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 17:55:38,187 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 17:55:38,187 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 17:55:38,187 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 17:55:38,188 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 17:55:38,188 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 17:55:38,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:55:38,188 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 17:55:38,188 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 17:55:38,188 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 17:55:38,188 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 17:55:38,188 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 17:55:38,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 17:55:38,188 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 17:55:38,188 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 17:55:38,189 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 17:55:38,189 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 17:55:38,189 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf [2025-03-16 17:55:38,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 17:55:38,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 17:55:38,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 17:55:38,399 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 17:55:38,399 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 17:55:38,401 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de62.c [2025-03-16 17:55:39,473 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7243d592e/6672f1b0c7484d6ca15ddaca79dc0b9e/FLAG21c1e3531 [2025-03-16 17:55:39,705 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 17:55:39,706 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.c [2025-03-16 17:55:39,714 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7243d592e/6672f1b0c7484d6ca15ddaca79dc0b9e/FLAG21c1e3531 [2025-03-16 17:55:39,727 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7243d592e/6672f1b0c7484d6ca15ddaca79dc0b9e [2025-03-16 17:55:39,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 17:55:39,732 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 17:55:39,733 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 17:55:39,733 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 17:55:39,736 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 17:55:39,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,738 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543f9edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39, skipping insertion in model container [2025-03-16 17:55:39,738 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,751 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 17:55:39,846 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/in-de62.c[368,381] [2025-03-16 17:55:39,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:55:39,865 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 17:55:39,871 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/in-de62.c[368,381] [2025-03-16 17:55:39,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:55:39,885 INFO L204 MainTranslator]: Completed translation [2025-03-16 17:55:39,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39 WrapperNode [2025-03-16 17:55:39,885 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 17:55:39,886 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 17:55:39,886 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 17:55:39,886 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 17:55:39,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,895 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,907 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2025-03-16 17:55:39,907 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 17:55:39,907 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 17:55:39,907 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 17:55:39,908 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 17:55:39,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,916 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,924 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]. [2025-03-16 17:55:39,928 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,928 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,930 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,932 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,934 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,935 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 17:55:39,939 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 17:55:39,939 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 17:55:39,939 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 17:55:39,940 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (1/1) ... [2025-03-16 17:55:39,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:55:39,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:39,965 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) [2025-03-16 17:55:39,971 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 [2025-03-16 17:55:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 17:55:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 17:55:39,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 17:55:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 17:55:40,033 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 17:55:40,035 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 17:55:40,149 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-16 17:55:40,149 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 17:55:40,160 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 17:55:40,160 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 17:55:40,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:55:40 BoogieIcfgContainer [2025-03-16 17:55:40,161 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 17:55:40,163 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 17:55:40,164 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 17:55:40,167 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 17:55:40,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 05:55:39" (1/3) ... [2025-03-16 17:55:40,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67414af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:55:40, skipping insertion in model container [2025-03-16 17:55:40,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:55:39" (2/3) ... [2025-03-16 17:55:40,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67414af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:55:40, skipping insertion in model container [2025-03-16 17:55:40,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:55:40" (3/3) ... [2025-03-16 17:55:40,170 INFO L128 eAbstractionObserver]: Analyzing ICFG in-de62.c [2025-03-16 17:55:40,182 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 17:55:40,184 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG in-de62.c that has 1 procedures, 13 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-16 17:55:40,225 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 17:55:40,232 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;@1288036b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 17:55:40,233 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 17:55:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 17:55:40,239 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:40,243 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:40,243 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:40,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:40,247 INFO L85 PathProgramCache]: Analyzing trace with hash -592939159, now seen corresponding path program 1 times [2025-03-16 17:55:40,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:40,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337473385] [2025-03-16 17:55:40,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:40,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:40,299 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 17:55:40,314 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 17:55:40,314 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:40,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:55:40,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:40,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337473385] [2025-03-16 17:55:40,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337473385] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:55:40,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:55:40,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 17:55:40,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408892592] [2025-03-16 17:55:40,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:55:40,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 17:55:40,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:40,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 17:55:40,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 17:55:40,481 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:40,524 INFO L93 Difference]: Finished difference Result 28 states and 43 transitions. [2025-03-16 17:55:40,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 17:55:40,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 17:55:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:40,530 INFO L225 Difference]: With dead ends: 28 [2025-03-16 17:55:40,530 INFO L226 Difference]: Without dead ends: 15 [2025-03-16 17:55:40,533 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 17:55:40,535 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:40,538 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:55:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-03-16 17:55:40,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-03-16 17:55:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2025-03-16 17:55:40,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 9 [2025-03-16 17:55:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:40,560 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2025-03-16 17:55:40,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2025-03-16 17:55:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-16 17:55:40,561 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:40,561 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:40,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 17:55:40,561 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:40,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1202076938, now seen corresponding path program 1 times [2025-03-16 17:55:40,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:40,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723102071] [2025-03-16 17:55:40,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:40,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:40,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-16 17:55:40,571 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 17:55:40,571 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:40,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:55:40,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:40,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723102071] [2025-03-16 17:55:40,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723102071] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:55:40,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:55:40,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 17:55:40,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450969849] [2025-03-16 17:55:40,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:55:40,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 17:55:40,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:40,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 17:55:40,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 17:55:40,603 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:40,628 INFO L93 Difference]: Finished difference Result 25 states and 38 transitions. [2025-03-16 17:55:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 17:55:40,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-16 17:55:40,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:40,629 INFO L225 Difference]: With dead ends: 25 [2025-03-16 17:55:40,629 INFO L226 Difference]: Without dead ends: 20 [2025-03-16 17:55:40,629 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 17:55:40,630 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:40,630 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:55:40,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-16 17:55:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-16 17:55:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2025-03-16 17:55:40,634 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 10 [2025-03-16 17:55:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:40,634 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2025-03-16 17:55:40,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2025-03-16 17:55:40,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-16 17:55:40,635 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:40,635 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:40,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 17:55:40,635 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:40,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:40,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1201212999, now seen corresponding path program 1 times [2025-03-16 17:55:40,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:40,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639115906] [2025-03-16 17:55:40,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:40,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:40,640 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-16 17:55:40,642 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 17:55:40,643 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:40,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:55:40,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:40,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639115906] [2025-03-16 17:55:40,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639115906] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:55:40,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:55:40,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 17:55:40,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163805339] [2025-03-16 17:55:40,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:55:40,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 17:55:40,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:40,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 17:55:40,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 17:55:40,670 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:40,701 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2025-03-16 17:55:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 17:55:40,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-16 17:55:40,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:40,702 INFO L225 Difference]: With dead ends: 43 [2025-03-16 17:55:40,702 INFO L226 Difference]: Without dead ends: 28 [2025-03-16 17:55:40,702 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 17:55:40,703 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:40,703 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:55:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-16 17:55:40,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-16 17:55:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2025-03-16 17:55:40,710 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 42 transitions. Word has length 10 [2025-03-16 17:55:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:40,710 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 42 transitions. [2025-03-16 17:55:40,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 42 transitions. [2025-03-16 17:55:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 17:55:40,710 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:40,710 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:40,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 17:55:40,711 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:40,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:40,711 INFO L85 PathProgramCache]: Analyzing trace with hash 781477433, now seen corresponding path program 1 times [2025-03-16 17:55:40,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:40,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652856337] [2025-03-16 17:55:40,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:40,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:40,718 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 17:55:40,729 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 17:55:40,732 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:40,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:55:40,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:40,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652856337] [2025-03-16 17:55:40,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652856337] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:40,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859250292] [2025-03-16 17:55:40,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:40,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:40,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:40,822 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) [2025-03-16 17:55:40,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 17:55:40,857 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 17:55:40,868 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 17:55:40,868 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:40,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:40,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 17:55:40,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:55:40,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:55:40,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859250292] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:40,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-16 17:55:40,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-16 17:55:40,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231077214] [2025-03-16 17:55:40,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:55:40,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 17:55:40,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:40,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 17:55:40,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:55:40,947 INFO L87 Difference]: Start difference. First operand 28 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:40,985 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2025-03-16 17:55:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 17:55:40,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-16 17:55:40,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:40,986 INFO L225 Difference]: With dead ends: 34 [2025-03-16 17:55:40,986 INFO L226 Difference]: Without dead ends: 25 [2025-03-16 17:55:40,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:55:40,987 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:40,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:55:40,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-16 17:55:40,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-16 17:55:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 37 transitions. [2025-03-16 17:55:40,996 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 37 transitions. Word has length 12 [2025-03-16 17:55:40,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:40,996 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 37 transitions. [2025-03-16 17:55:40,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,996 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 37 transitions. [2025-03-16 17:55:40,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 17:55:40,997 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:40,997 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:41,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 17:55:41,198 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 [2025-03-16 17:55:41,198 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:41,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:41,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2052619033, now seen corresponding path program 1 times [2025-03-16 17:55:41,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:41,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349856295] [2025-03-16 17:55:41,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:41,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:41,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 17:55:41,225 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 17:55:41,225 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:41,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:55:41,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:41,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349856295] [2025-03-16 17:55:41,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349856295] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:55:41,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:55:41,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 17:55:41,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414335860] [2025-03-16 17:55:41,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:55:41,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 17:55:41,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:41,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 17:55:41,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 17:55:41,286 INFO L87 Difference]: Start difference. First operand 25 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:41,319 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2025-03-16 17:55:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 17:55:41,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-16 17:55:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:41,320 INFO L225 Difference]: With dead ends: 33 [2025-03-16 17:55:41,320 INFO L226 Difference]: Without dead ends: 22 [2025-03-16 17:55:41,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-16 17:55:41,321 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:41,322 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:55:41,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-16 17:55:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-03-16 17:55:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2025-03-16 17:55:41,327 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 12 [2025-03-16 17:55:41,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:41,327 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2025-03-16 17:55:41,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2025-03-16 17:55:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-16 17:55:41,327 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:41,327 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:41,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-16 17:55:41,328 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:41,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1937333642, now seen corresponding path program 1 times [2025-03-16 17:55:41,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:41,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502153675] [2025-03-16 17:55:41,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:41,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:41,332 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-16 17:55:41,339 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 17:55:41,341 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:41,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:55:41,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502153675] [2025-03-16 17:55:41,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502153675] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699222427] [2025-03-16 17:55:41,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:41,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:41,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:41,407 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) [2025-03-16 17:55:41,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 17:55:41,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-16 17:55:41,441 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 17:55:41,441 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:41,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:41,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 17:55:41,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 17:55:41,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 17:55:41,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699222427] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:41,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:41,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-03-16 17:55:41,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166030184] [2025-03-16 17:55:41,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:41,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 17:55:41,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:41,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 17:55:41,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-16 17:55:41,504 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:41,573 INFO L93 Difference]: Finished difference Result 66 states and 106 transitions. [2025-03-16 17:55:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 17:55:41,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-16 17:55:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:41,574 INFO L225 Difference]: With dead ends: 66 [2025-03-16 17:55:41,574 INFO L226 Difference]: Without dead ends: 53 [2025-03-16 17:55:41,574 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-16 17:55:41,575 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:41,575 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:55:41,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-16 17:55:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2025-03-16 17:55:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 51 transitions. [2025-03-16 17:55:41,581 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 51 transitions. Word has length 13 [2025-03-16 17:55:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:41,582 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 51 transitions. [2025-03-16 17:55:41,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 51 transitions. [2025-03-16 17:55:41,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-16 17:55:41,582 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:41,582 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:41,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 17:55:41,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-16 17:55:41,786 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:41,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:41,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1018496873, now seen corresponding path program 1 times [2025-03-16 17:55:41,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:41,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884324245] [2025-03-16 17:55:41,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:41,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:41,790 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-16 17:55:41,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 17:55:41,793 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:41,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 17:55:41,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:41,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884324245] [2025-03-16 17:55:41,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884324245] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:41,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135378221] [2025-03-16 17:55:41,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:41,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:41,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:41,836 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) [2025-03-16 17:55:41,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 17:55:41,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-16 17:55:41,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 17:55:41,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:41,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:41,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 17:55:41,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:55:41,897 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 17:55:41,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135378221] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:41,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:41,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2025-03-16 17:55:41,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819789130] [2025-03-16 17:55:41,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:41,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 17:55:41,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:41,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 17:55:41,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2025-03-16 17:55:41,938 INFO L87 Difference]: Start difference. First operand 34 states and 51 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:42,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:42,080 INFO L93 Difference]: Finished difference Result 130 states and 220 transitions. [2025-03-16 17:55:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 17:55:42,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-16 17:55:42,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:42,081 INFO L225 Difference]: With dead ends: 130 [2025-03-16 17:55:42,081 INFO L226 Difference]: Without dead ends: 107 [2025-03-16 17:55:42,081 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2025-03-16 17:55:42,081 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:42,081 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:55:42,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-03-16 17:55:42,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2025-03-16 17:55:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.5394736842105263) internal successors, (117), 76 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 117 transitions. [2025-03-16 17:55:42,101 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 117 transitions. Word has length 13 [2025-03-16 17:55:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:42,101 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 117 transitions. [2025-03-16 17:55:42,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 117 transitions. [2025-03-16 17:55:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-16 17:55:42,102 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:42,102 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:42,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 17:55:42,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:42,302 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:42,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:42,303 INFO L85 PathProgramCache]: Analyzing trace with hash -873783724, now seen corresponding path program 1 times [2025-03-16 17:55:42,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:42,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002563751] [2025-03-16 17:55:42,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:42,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:42,306 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-16 17:55:42,310 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 17:55:42,310 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:42,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:55:42,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:42,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002563751] [2025-03-16 17:55:42,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002563751] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:42,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168641789] [2025-03-16 17:55:42,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:42,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:42,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:42,386 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) [2025-03-16 17:55:42,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 17:55:42,406 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-16 17:55:42,414 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 17:55:42,414 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:42,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:42,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 17:55:42,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:55:42,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:55:42,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168641789] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:42,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:42,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2025-03-16 17:55:42,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752007694] [2025-03-16 17:55:42,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:42,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 17:55:42,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:42,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 17:55:42,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-16 17:55:42,475 INFO L87 Difference]: Start difference. First operand 77 states and 117 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:42,705 INFO L93 Difference]: Finished difference Result 149 states and 226 transitions. [2025-03-16 17:55:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 17:55:42,706 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-16 17:55:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:42,706 INFO L225 Difference]: With dead ends: 149 [2025-03-16 17:55:42,706 INFO L226 Difference]: Without dead ends: 116 [2025-03-16 17:55:42,707 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2025-03-16 17:55:42,707 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:42,707 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 39 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:55:42,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-16 17:55:42,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2025-03-16 17:55:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4736842105263157) internal successors, (140), 95 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 140 transitions. [2025-03-16 17:55:42,726 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 140 transitions. Word has length 14 [2025-03-16 17:55:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:42,726 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 140 transitions. [2025-03-16 17:55:42,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 140 transitions. [2025-03-16 17:55:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-16 17:55:42,727 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:42,727 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:42,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 17:55:42,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:42,931 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:42,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:42,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1344242031, now seen corresponding path program 1 times [2025-03-16 17:55:42,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:42,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456158636] [2025-03-16 17:55:42,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:42,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:42,935 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-16 17:55:42,942 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 17:55:42,942 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:42,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:55:43,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:43,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456158636] [2025-03-16 17:55:43,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456158636] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:43,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328847967] [2025-03-16 17:55:43,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:43,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:43,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:43,039 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) [2025-03-16 17:55:43,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 17:55:43,071 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-16 17:55:43,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 17:55:43,079 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:43,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:43,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 17:55:43,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 17:55:43,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 17:55:43,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328847967] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:43,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:43,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2025-03-16 17:55:43,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673892657] [2025-03-16 17:55:43,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:43,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 17:55:43,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:43,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 17:55:43,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 17:55:43,151 INFO L87 Difference]: Start difference. First operand 96 states and 140 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:43,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:43,196 INFO L93 Difference]: Finished difference Result 123 states and 180 transitions. [2025-03-16 17:55:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 17:55:43,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-16 17:55:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:43,197 INFO L225 Difference]: With dead ends: 123 [2025-03-16 17:55:43,197 INFO L226 Difference]: Without dead ends: 110 [2025-03-16 17:55:43,198 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 17:55:43,198 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:43,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:55:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-03-16 17:55:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2025-03-16 17:55:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.5217391304347827) internal successors, (140), 92 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 140 transitions. [2025-03-16 17:55:43,221 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 140 transitions. Word has length 15 [2025-03-16 17:55:43,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:43,221 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 140 transitions. [2025-03-16 17:55:43,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:43,221 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 140 transitions. [2025-03-16 17:55:43,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 17:55:43,224 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:43,224 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:43,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 17:55:43,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:43,429 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:43,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:43,429 INFO L85 PathProgramCache]: Analyzing trace with hash 862205561, now seen corresponding path program 2 times [2025-03-16 17:55:43,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:43,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237191744] [2025-03-16 17:55:43,429 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:55:43,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:43,434 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-16 17:55:43,439 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 17:55:43,440 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:55:43,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 17:55:43,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:43,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237191744] [2025-03-16 17:55:43,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237191744] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:43,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325949396] [2025-03-16 17:55:43,527 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:55:43,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:43,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:43,529 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) [2025-03-16 17:55:43,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 17:55:43,551 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-16 17:55:43,559 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 17:55:43,560 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:55:43,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:43,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 17:55:43,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 17:55:43,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 17:55:43,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325949396] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:43,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:43,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-16 17:55:43,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290729657] [2025-03-16 17:55:43,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:43,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 17:55:43,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:43,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 17:55:43,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-16 17:55:43,630 INFO L87 Difference]: Start difference. First operand 93 states and 140 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:43,742 INFO L93 Difference]: Finished difference Result 132 states and 199 transitions. [2025-03-16 17:55:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 17:55:43,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-16 17:55:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:43,743 INFO L225 Difference]: With dead ends: 132 [2025-03-16 17:55:43,743 INFO L226 Difference]: Without dead ends: 88 [2025-03-16 17:55:43,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-03-16 17:55:43,744 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:43,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 52 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:55:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-16 17:55:43,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2025-03-16 17:55:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.5063291139240507) internal successors, (119), 79 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 119 transitions. [2025-03-16 17:55:43,767 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 119 transitions. Word has length 16 [2025-03-16 17:55:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:43,767 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 119 transitions. [2025-03-16 17:55:43,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 119 transitions. [2025-03-16 17:55:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 17:55:43,768 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:43,768 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:43,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 17:55:43,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:43,968 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:43,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:43,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1646150696, now seen corresponding path program 3 times [2025-03-16 17:55:43,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:43,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57466105] [2025-03-16 17:55:43,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:55:43,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:43,972 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-03-16 17:55:43,977 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 17:55:43,977 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 17:55:43,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:55:44,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:44,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57466105] [2025-03-16 17:55:44,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57466105] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:44,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189980733] [2025-03-16 17:55:44,074 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:55:44,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:44,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:44,076 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) [2025-03-16 17:55:44,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 17:55:44,099 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-03-16 17:55:44,108 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 17:55:44,108 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 17:55:44,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:44,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 17:55:44,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 17:55:44,148 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 17:55:44,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189980733] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:44,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:44,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 16 [2025-03-16 17:55:44,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664565475] [2025-03-16 17:55:44,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:44,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 17:55:44,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:44,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 17:55:44,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2025-03-16 17:55:44,197 INFO L87 Difference]: Start difference. First operand 80 states and 119 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:44,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:44,449 INFO L93 Difference]: Finished difference Result 169 states and 271 transitions. [2025-03-16 17:55:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-16 17:55:44,449 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-16 17:55:44,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:44,450 INFO L225 Difference]: With dead ends: 169 [2025-03-16 17:55:44,450 INFO L226 Difference]: Without dead ends: 130 [2025-03-16 17:55:44,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2025-03-16 17:55:44,451 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:44,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 69 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:55:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2025-03-16 17:55:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2025-03-16 17:55:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.4545454545454546) internal successors, (144), 99 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 144 transitions. [2025-03-16 17:55:44,476 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 144 transitions. Word has length 17 [2025-03-16 17:55:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:44,476 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 144 transitions. [2025-03-16 17:55:44,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 144 transitions. [2025-03-16 17:55:44,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 17:55:44,477 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:44,477 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:44,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 17:55:44,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:44,677 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:44,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:44,678 INFO L85 PathProgramCache]: Analyzing trace with hash 546842312, now seen corresponding path program 2 times [2025-03-16 17:55:44,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:44,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072172196] [2025-03-16 17:55:44,678 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:55:44,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:44,681 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 17:55:44,688 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 17:55:44,688 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:55:44,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 17:55:44,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:44,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072172196] [2025-03-16 17:55:44,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072172196] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:44,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085331002] [2025-03-16 17:55:44,740 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:55:44,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:44,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:44,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 17:55:44,764 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 17:55:44,773 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 17:55:44,774 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:55:44,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:44,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 17:55:44,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 17:55:44,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 17:55:44,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085331002] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:44,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:44,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2025-03-16 17:55:44,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621202615] [2025-03-16 17:55:44,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:44,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 17:55:44,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:44,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 17:55:44,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:55:44,851 INFO L87 Difference]: Start difference. First operand 100 states and 144 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:44,997 INFO L93 Difference]: Finished difference Result 226 states and 343 transitions. [2025-03-16 17:55:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 17:55:44,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-16 17:55:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:44,998 INFO L225 Difference]: With dead ends: 226 [2025-03-16 17:55:44,998 INFO L226 Difference]: Without dead ends: 186 [2025-03-16 17:55:44,998 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2025-03-16 17:55:44,999 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:44,999 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:55:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2025-03-16 17:55:45,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 133. [2025-03-16 17:55:45,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.4545454545454546) internal successors, (192), 132 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 192 transitions. [2025-03-16 17:55:45,038 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 192 transitions. Word has length 19 [2025-03-16 17:55:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:45,038 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 192 transitions. [2025-03-16 17:55:45,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 192 transitions. [2025-03-16 17:55:45,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-16 17:55:45,039 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:45,039 INFO L218 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:45,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 17:55:45,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-16 17:55:45,240 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:45,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:45,240 INFO L85 PathProgramCache]: Analyzing trace with hash 999468409, now seen corresponding path program 1 times [2025-03-16 17:55:45,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:45,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764121919] [2025-03-16 17:55:45,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:45,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:45,243 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-16 17:55:45,250 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-16 17:55:45,250 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:45,250 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 17:55:45,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:45,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764121919] [2025-03-16 17:55:45,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764121919] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:45,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079505290] [2025-03-16 17:55:45,346 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:55:45,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:45,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:45,348 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:45,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 17:55:45,370 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-16 17:55:45,380 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-16 17:55:45,380 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:45,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:45,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-16 17:55:45,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 17:55:45,422 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 17:55:45,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079505290] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:45,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:45,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 17 [2025-03-16 17:55:45,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298702618] [2025-03-16 17:55:45,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:45,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 17:55:45,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:45,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 17:55:45,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2025-03-16 17:55:45,481 INFO L87 Difference]: Start difference. First operand 133 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:45,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:45,744 INFO L93 Difference]: Finished difference Result 339 states and 523 transitions. [2025-03-16 17:55:45,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-16 17:55:45,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-03-16 17:55:45,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:45,745 INFO L225 Difference]: With dead ends: 339 [2025-03-16 17:55:45,745 INFO L226 Difference]: Without dead ends: 260 [2025-03-16 17:55:45,746 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2025-03-16 17:55:45,746 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 67 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:45,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 158 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:55:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2025-03-16 17:55:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 184. [2025-03-16 17:55:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.4316939890710383) internal successors, (262), 183 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 262 transitions. [2025-03-16 17:55:45,777 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 262 transitions. Word has length 20 [2025-03-16 17:55:45,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:45,777 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 262 transitions. [2025-03-16 17:55:45,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 262 transitions. [2025-03-16 17:55:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-16 17:55:45,778 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:45,778 INFO L218 NwaCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:45,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 17:55:45,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 17:55:45,979 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:45,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:45,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1215742806, now seen corresponding path program 2 times [2025-03-16 17:55:45,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:45,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698215198] [2025-03-16 17:55:45,979 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:55:45,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:45,982 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-16 17:55:45,994 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 17:55:45,994 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:55:45,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 17:55:46,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:46,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698215198] [2025-03-16 17:55:46,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698215198] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:46,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944612576] [2025-03-16 17:55:46,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:55:46,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:46,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:46,124 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:46,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 17:55:46,163 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-16 17:55:46,173 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 17:55:46,173 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:55:46,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:46,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 17:55:46,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 17:55:46,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 17:55:46,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944612576] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:46,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:46,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2025-03-16 17:55:46,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068895848] [2025-03-16 17:55:46,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:46,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 17:55:46,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:46,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 17:55:46,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2025-03-16 17:55:46,402 INFO L87 Difference]: Start difference. First operand 184 states and 262 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:47,962 INFO L93 Difference]: Finished difference Result 766 states and 1141 transitions. [2025-03-16 17:55:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-03-16 17:55:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-03-16 17:55:47,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:47,968 INFO L225 Difference]: With dead ends: 766 [2025-03-16 17:55:47,968 INFO L226 Difference]: Without dead ends: 690 [2025-03-16 17:55:47,970 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=952, Invalid=3208, Unknown=0, NotChecked=0, Total=4160 [2025-03-16 17:55:47,970 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 204 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:47,971 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 168 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 17:55:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2025-03-16 17:55:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 253. [2025-03-16 17:55:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.3888888888888888) internal successors, (350), 252 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:48,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 350 transitions. [2025-03-16 17:55:48,036 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 350 transitions. Word has length 21 [2025-03-16 17:55:48,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:48,036 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 350 transitions. [2025-03-16 17:55:48,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:48,037 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 350 transitions. [2025-03-16 17:55:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-16 17:55:48,037 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:48,037 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:48,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 17:55:48,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-16 17:55:48,238 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:48,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:48,239 INFO L85 PathProgramCache]: Analyzing trace with hash -230660375, now seen corresponding path program 3 times [2025-03-16 17:55:48,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:48,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575374798] [2025-03-16 17:55:48,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:55:48,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:48,243 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-16 17:55:48,256 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 17:55:48,256 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 17:55:48,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 17:55:48,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:48,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575374798] [2025-03-16 17:55:48,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575374798] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:48,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148669228] [2025-03-16 17:55:48,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:55:48,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:48,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:48,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:48,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 17:55:48,374 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-16 17:55:48,383 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 17:55:48,384 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 17:55:48,384 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:48,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 17:55:48,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 17:55:48,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 17:55:48,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148669228] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:48,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:48,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2025-03-16 17:55:48,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976534457] [2025-03-16 17:55:48,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:48,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 17:55:48,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:48,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 17:55:48,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-16 17:55:48,468 INFO L87 Difference]: Start difference. First operand 253 states and 350 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:48,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:48,604 INFO L93 Difference]: Finished difference Result 307 states and 424 transitions. [2025-03-16 17:55:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 17:55:48,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-03-16 17:55:48,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:48,606 INFO L225 Difference]: With dead ends: 307 [2025-03-16 17:55:48,606 INFO L226 Difference]: Without dead ends: 289 [2025-03-16 17:55:48,606 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-16 17:55:48,606 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:48,606 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:55:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2025-03-16 17:55:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 251. [2025-03-16 17:55:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.42) internal successors, (355), 250 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 355 transitions. [2025-03-16 17:55:48,667 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 355 transitions. Word has length 21 [2025-03-16 17:55:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:48,667 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 355 transitions. [2025-03-16 17:55:48,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 355 transitions. [2025-03-16 17:55:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 17:55:48,668 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:48,668 INFO L218 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:48,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-16 17:55:48,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-16 17:55:48,868 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:48,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:48,869 INFO L85 PathProgramCache]: Analyzing trace with hash -803105943, now seen corresponding path program 2 times [2025-03-16 17:55:48,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:48,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976526637] [2025-03-16 17:55:48,869 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:55:48,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:48,872 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-16 17:55:48,881 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 17:55:48,881 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:55:48,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 17:55:49,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:49,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976526637] [2025-03-16 17:55:49,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976526637] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:49,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710597164] [2025-03-16 17:55:49,060 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:55:49,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:49,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:49,062 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:49,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 17:55:49,082 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-16 17:55:49,092 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 17:55:49,093 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:55:49,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:49,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 17:55:49,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 17:55:49,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-16 17:55:49,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710597164] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:49,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:49,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 8] total 23 [2025-03-16 17:55:49,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637947289] [2025-03-16 17:55:49,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:49,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 17:55:49,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:49,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 17:55:49,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2025-03-16 17:55:49,221 INFO L87 Difference]: Start difference. First operand 251 states and 355 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:49,899 INFO L93 Difference]: Finished difference Result 495 states and 722 transitions. [2025-03-16 17:55:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-16 17:55:49,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 17:55:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:49,902 INFO L225 Difference]: With dead ends: 495 [2025-03-16 17:55:49,902 INFO L226 Difference]: Without dead ends: 351 [2025-03-16 17:55:49,902 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=1798, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 17:55:49,903 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 70 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:49,903 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 267 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 17:55:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2025-03-16 17:55:49,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 263. [2025-03-16 17:55:49,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.4236641221374047) internal successors, (373), 262 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 373 transitions. [2025-03-16 17:55:49,969 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 373 transitions. Word has length 23 [2025-03-16 17:55:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:49,969 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 373 transitions. [2025-03-16 17:55:49,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:49,969 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 373 transitions. [2025-03-16 17:55:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 17:55:49,969 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:49,969 INFO L218 NwaCegarLoop]: trace histogram [7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:49,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-16 17:55:50,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-16 17:55:50,170 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:50,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:50,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887503, now seen corresponding path program 3 times [2025-03-16 17:55:50,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:50,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221514373] [2025-03-16 17:55:50,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:55:50,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:50,174 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 5 equivalence classes. [2025-03-16 17:55:50,182 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 23 of 26 statements. [2025-03-16 17:55:50,182 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 17:55:50,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-03-16 17:55:50,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:50,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221514373] [2025-03-16 17:55:50,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221514373] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:50,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256893137] [2025-03-16 17:55:50,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:55:50,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:50,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:50,238 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:50,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 17:55:50,260 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 5 equivalence classes. [2025-03-16 17:55:50,272 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 23 of 26 statements. [2025-03-16 17:55:50,272 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 17:55:50,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:50,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 17:55:50,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-16 17:55:50,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-16 17:55:50,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256893137] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:50,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:50,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-03-16 17:55:50,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641623744] [2025-03-16 17:55:50,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:50,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 17:55:50,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:50,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 17:55:50,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-03-16 17:55:50,413 INFO L87 Difference]: Start difference. First operand 263 states and 373 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:50,991 INFO L93 Difference]: Finished difference Result 384 states and 543 transitions. [2025-03-16 17:55:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 17:55:50,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-03-16 17:55:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:50,993 INFO L225 Difference]: With dead ends: 384 [2025-03-16 17:55:50,993 INFO L226 Difference]: Without dead ends: 381 [2025-03-16 17:55:50,994 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2025-03-16 17:55:50,994 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:50,994 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 86 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 17:55:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2025-03-16 17:55:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 284. [2025-03-16 17:55:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.4487632508833923) internal successors, (410), 283 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 410 transitions. [2025-03-16 17:55:51,065 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 410 transitions. Word has length 26 [2025-03-16 17:55:51,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:51,066 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 410 transitions. [2025-03-16 17:55:51,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 410 transitions. [2025-03-16 17:55:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 17:55:51,066 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:51,066 INFO L218 NwaCegarLoop]: trace histogram [6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:51,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 17:55:51,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-16 17:55:51,267 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:51,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:51,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1780579672, now seen corresponding path program 4 times [2025-03-16 17:55:51,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:51,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915877887] [2025-03-16 17:55:51,267 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:55:51,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:51,270 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-16 17:55:51,276 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 17:55:51,276 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:55:51,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 17:55:51,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:51,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915877887] [2025-03-16 17:55:51,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915877887] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:51,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215621814] [2025-03-16 17:55:51,385 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:55:51,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:51,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:51,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:51,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 17:55:51,410 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-16 17:55:51,422 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 17:55:51,422 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:55:51,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:51,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 17:55:51,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 17:55:51,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 17:55:51,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215621814] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:51,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:51,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 25 [2025-03-16 17:55:51,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132917413] [2025-03-16 17:55:51,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:51,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 17:55:51,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:51,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 17:55:51,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2025-03-16 17:55:51,675 INFO L87 Difference]: Start difference. First operand 284 states and 410 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:58,059 INFO L93 Difference]: Finished difference Result 808 states and 1220 transitions. [2025-03-16 17:55:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2025-03-16 17:55:58,059 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-03-16 17:55:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:58,062 INFO L225 Difference]: With dead ends: 808 [2025-03-16 17:55:58,062 INFO L226 Difference]: Without dead ends: 647 [2025-03-16 17:55:58,069 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16796 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5227, Invalid=37415, Unknown=0, NotChecked=0, Total=42642 [2025-03-16 17:55:58,070 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 498 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:58,070 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 122 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 17:55:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2025-03-16 17:55:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 440. [2025-03-16 17:55:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.4920273348519362) internal successors, (655), 439 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 655 transitions. [2025-03-16 17:55:58,225 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 655 transitions. Word has length 27 [2025-03-16 17:55:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:58,225 INFO L471 AbstractCegarLoop]: Abstraction has 440 states and 655 transitions. [2025-03-16 17:55:58,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 655 transitions. [2025-03-16 17:55:58,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 17:55:58,226 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:58,226 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:58,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 17:55:58,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:58,427 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:58,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:58,427 INFO L85 PathProgramCache]: Analyzing trace with hash 862568721, now seen corresponding path program 5 times [2025-03-16 17:55:58,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:58,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551871982] [2025-03-16 17:55:58,427 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:55:58,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:58,430 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-16 17:55:58,452 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 17:55:58,452 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-16 17:55:58,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 17:55:58,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:58,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551871982] [2025-03-16 17:55:58,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551871982] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:58,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168764345] [2025-03-16 17:55:58,543 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:55:58,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:58,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:58,545 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:58,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 17:55:58,567 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-16 17:55:58,589 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 17:55:58,589 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-16 17:55:58,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:58,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 17:55:58,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 17:55:58,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 17:55:58,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168764345] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:58,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:58,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2025-03-16 17:55:58,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395280873] [2025-03-16 17:55:58,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:58,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 17:55:58,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:58,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 17:55:58,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:55:58,660 INFO L87 Difference]: Start difference. First operand 440 states and 655 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:58,921 INFO L93 Difference]: Finished difference Result 532 states and 779 transitions. [2025-03-16 17:55:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 17:55:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-03-16 17:55:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:58,923 INFO L225 Difference]: With dead ends: 532 [2025-03-16 17:55:58,923 INFO L226 Difference]: Without dead ends: 509 [2025-03-16 17:55:58,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:55:58,924 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:58,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 55 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:55:58,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2025-03-16 17:55:59,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 431. [2025-03-16 17:55:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 1.5093023255813953) internal successors, (649), 430 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:59,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 649 transitions. [2025-03-16 17:55:59,107 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 649 transitions. Word has length 27 [2025-03-16 17:55:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:59,107 INFO L471 AbstractCegarLoop]: Abstraction has 431 states and 649 transitions. [2025-03-16 17:55:59,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 649 transitions. [2025-03-16 17:55:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-16 17:55:59,107 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:59,107 INFO L218 NwaCegarLoop]: trace histogram [7, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:59,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-16 17:55:59,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:59,310 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:59,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:59,311 INFO L85 PathProgramCache]: Analyzing trace with hash -450475663, now seen corresponding path program 6 times [2025-03-16 17:55:59,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:59,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341183906] [2025-03-16 17:55:59,311 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:55:59,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:59,314 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-16 17:55:59,329 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 17:55:59,329 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 17:55:59,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 17:55:59,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:59,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341183906] [2025-03-16 17:55:59,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341183906] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:59,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520932084] [2025-03-16 17:55:59,447 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:55:59,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:59,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:59,449 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:59,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 17:55:59,475 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-03-16 17:55:59,490 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 17:55:59,490 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 17:55:59,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:59,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-16 17:55:59,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 17:55:59,604 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 17:55:59,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520932084] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:59,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:59,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 13] total 31 [2025-03-16 17:55:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088003321] [2025-03-16 17:55:59,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:59,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-16 17:55:59,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:59,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-16 17:55:59,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2025-03-16 17:55:59,817 INFO L87 Difference]: Start difference. First operand 431 states and 649 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:56:01,880 INFO L93 Difference]: Finished difference Result 837 states and 1293 transitions. [2025-03-16 17:56:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2025-03-16 17:56:01,880 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-03-16 17:56:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:56:01,883 INFO L225 Difference]: With dead ends: 837 [2025-03-16 17:56:01,883 INFO L226 Difference]: Without dead ends: 629 [2025-03-16 17:56:01,884 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2499 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1139, Invalid=7233, Unknown=0, NotChecked=0, Total=8372 [2025-03-16 17:56:01,885 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 101 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 17:56:01,885 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 353 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 17:56:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2025-03-16 17:56:02,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 456. [2025-03-16 17:56:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.5076923076923077) internal successors, (686), 455 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 686 transitions. [2025-03-16 17:56:02,048 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 686 transitions. Word has length 28 [2025-03-16 17:56:02,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:56:02,048 INFO L471 AbstractCegarLoop]: Abstraction has 456 states and 686 transitions. [2025-03-16 17:56:02,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 686 transitions. [2025-03-16 17:56:02,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-16 17:56:02,049 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:56:02,049 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:56:02,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-16 17:56:02,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:02,254 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:56:02,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:56:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1431011416, now seen corresponding path program 4 times [2025-03-16 17:56:02,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:56:02,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419957100] [2025-03-16 17:56:02,254 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:56:02,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:56:02,257 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-16 17:56:02,263 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 17:56:02,263 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:56:02,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:56:02,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:56:02,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419957100] [2025-03-16 17:56:02,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419957100] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:56:02,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741517443] [2025-03-16 17:56:02,419 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:56:02,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:02,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:56:02,421 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:56:02,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 17:56:02,442 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-16 17:56:02,453 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 17:56:02,453 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:56:02,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:02,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-16 17:56:02,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:56:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:56:02,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:56:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:56:02,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741517443] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:56:02,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:56:02,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2025-03-16 17:56:02,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138165775] [2025-03-16 17:56:02,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:56:02,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-16 17:56:02,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:56:02,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-16 17:56:02,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2025-03-16 17:56:02,703 INFO L87 Difference]: Start difference. First operand 456 states and 686 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:56:12,934 INFO L93 Difference]: Finished difference Result 1131 states and 1772 transitions. [2025-03-16 17:56:12,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2025-03-16 17:56:12,934 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-03-16 17:56:12,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:56:12,938 INFO L225 Difference]: With dead ends: 1131 [2025-03-16 17:56:12,938 INFO L226 Difference]: Without dead ends: 962 [2025-03-16 17:56:12,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23725 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=13012, Invalid=44828, Unknown=0, NotChecked=0, Total=57840 [2025-03-16 17:56:12,943 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 951 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-16 17:56:12,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 181 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-16 17:56:12,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2025-03-16 17:56:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 482. [2025-03-16 17:56:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.4324324324324325) internal successors, (689), 481 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:13,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 689 transitions. [2025-03-16 17:56:13,153 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 689 transitions. Word has length 29 [2025-03-16 17:56:13,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:56:13,153 INFO L471 AbstractCegarLoop]: Abstraction has 482 states and 689 transitions. [2025-03-16 17:56:13,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 689 transitions. [2025-03-16 17:56:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-16 17:56:13,154 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:56:13,154 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:56:13,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-16 17:56:13,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:13,356 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:56:13,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:56:13,356 INFO L85 PathProgramCache]: Analyzing trace with hash 55326841, now seen corresponding path program 7 times [2025-03-16 17:56:13,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:56:13,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094127402] [2025-03-16 17:56:13,356 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:56:13,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:56:13,359 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-16 17:56:13,365 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 17:56:13,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:56:13,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 17:56:13,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:56:13,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094127402] [2025-03-16 17:56:13,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094127402] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:56:13,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226569365] [2025-03-16 17:56:13,548 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:56:13,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:13,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:56:13,550 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:56:13,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 17:56:13,573 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-16 17:56:13,588 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 17:56:13,588 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:56:13,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:13,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-16 17:56:13,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:56:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 17:56:13,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:56:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 17:56:13,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226569365] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:56:13,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:56:13,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2025-03-16 17:56:13,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041729568] [2025-03-16 17:56:13,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:56:13,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-16 17:56:13,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:56:13,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-16 17:56:13,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2025-03-16 17:56:13,955 INFO L87 Difference]: Start difference. First operand 482 states and 689 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:56:23,654 INFO L93 Difference]: Finished difference Result 1555 states and 2285 transitions. [2025-03-16 17:56:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 340 states. [2025-03-16 17:56:23,654 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-03-16 17:56:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:56:23,658 INFO L225 Difference]: With dead ends: 1555 [2025-03-16 17:56:23,658 INFO L226 Difference]: Without dead ends: 1305 [2025-03-16 17:56:23,663 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 47 SyntacticMatches, 14 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52003 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=6190, Invalid=114566, Unknown=0, NotChecked=0, Total=120756 [2025-03-16 17:56:23,664 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 347 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 2276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-16 17:56:23,664 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 531 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 2276 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-16 17:56:23,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2025-03-16 17:56:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 520. [2025-03-16 17:56:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.4084778420038535) internal successors, (731), 519 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 731 transitions. [2025-03-16 17:56:23,976 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 731 transitions. Word has length 30 [2025-03-16 17:56:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:56:23,976 INFO L471 AbstractCegarLoop]: Abstraction has 520 states and 731 transitions. [2025-03-16 17:56:23,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 731 transitions. [2025-03-16 17:56:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-16 17:56:23,977 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:56:23,977 INFO L218 NwaCegarLoop]: trace histogram [9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:56:23,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-16 17:56:24,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:24,178 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:56:24,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:56:24,178 INFO L85 PathProgramCache]: Analyzing trace with hash 646680038, now seen corresponding path program 8 times [2025-03-16 17:56:24,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:56:24,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641604977] [2025-03-16 17:56:24,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:56:24,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:56:24,181 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-16 17:56:24,188 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 17:56:24,188 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:56:24,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 17:56:24,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:56:24,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641604977] [2025-03-16 17:56:24,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641604977] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:56:24,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198782887] [2025-03-16 17:56:24,304 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:56:24,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:24,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:56:24,307 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:56:24,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 17:56:24,332 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-16 17:56:24,346 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 17:56:24,346 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:56:24,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:24,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-16 17:56:24,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:56:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 17:56:24,410 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:56:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 17:56:24,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198782887] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:56:24,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:56:24,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 10] total 25 [2025-03-16 17:56:24,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685092606] [2025-03-16 17:56:24,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:56:24,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 17:56:24,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:56:24,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 17:56:24,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2025-03-16 17:56:24,554 INFO L87 Difference]: Start difference. First operand 520 states and 731 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:56:26,229 INFO L93 Difference]: Finished difference Result 1043 states and 1528 transitions. [2025-03-16 17:56:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2025-03-16 17:56:26,230 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-03-16 17:56:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:56:26,232 INFO L225 Difference]: With dead ends: 1043 [2025-03-16 17:56:26,232 INFO L226 Difference]: Without dead ends: 766 [2025-03-16 17:56:26,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=583, Invalid=4387, Unknown=0, NotChecked=0, Total=4970 [2025-03-16 17:56:26,233 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 114 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 17:56:26,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 542 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 17:56:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2025-03-16 17:56:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 565. [2025-03-16 17:56:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.3953900709219857) internal successors, (787), 564 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 787 transitions. [2025-03-16 17:56:26,621 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 787 transitions. Word has length 31 [2025-03-16 17:56:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:56:26,621 INFO L471 AbstractCegarLoop]: Abstraction has 565 states and 787 transitions. [2025-03-16 17:56:26,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:26,621 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 787 transitions. [2025-03-16 17:56:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 17:56:26,622 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:56:26,622 INFO L218 NwaCegarLoop]: trace histogram [10, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:56:26,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-16 17:56:26,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:26,822 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:56:26,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:56:26,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1207770840, now seen corresponding path program 9 times [2025-03-16 17:56:26,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:56:26,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870050887] [2025-03-16 17:56:26,823 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:56:26,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:56:26,825 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 6 equivalence classes. [2025-03-16 17:56:26,834 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 27 of 33 statements. [2025-03-16 17:56:26,834 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 17:56:26,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-16 17:56:26,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:56:26,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870050887] [2025-03-16 17:56:26,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870050887] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:56:26,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128523553] [2025-03-16 17:56:26,962 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:56:26,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:26,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:56:26,964 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:56:26,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 17:56:26,993 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 6 equivalence classes. [2025-03-16 17:56:27,007 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 27 of 33 statements. [2025-03-16 17:56:27,007 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 17:56:27,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:27,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 17:56:27,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:56:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-16 17:56:27,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:56:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-16 17:56:27,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128523553] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:56:27,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:56:27,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-03-16 17:56:27,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472550900] [2025-03-16 17:56:27,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:56:27,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 17:56:27,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:56:27,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 17:56:27,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2025-03-16 17:56:27,395 INFO L87 Difference]: Start difference. First operand 565 states and 787 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:32,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-16 17:56:32,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:56:32,912 INFO L93 Difference]: Finished difference Result 619 states and 843 transitions. [2025-03-16 17:56:32,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 17:56:32,913 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-16 17:56:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:56:32,915 INFO L225 Difference]: With dead ends: 619 [2025-03-16 17:56:32,915 INFO L226 Difference]: Without dead ends: 574 [2025-03-16 17:56:32,915 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2025-03-16 17:56:32,915 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2025-03-16 17:56:32,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 103 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2025-03-16 17:56:32,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2025-03-16 17:56:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 536. [2025-03-16 17:56:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.394392523364486) internal successors, (746), 535 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 746 transitions. [2025-03-16 17:56:33,189 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 746 transitions. Word has length 33 [2025-03-16 17:56:33,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:56:33,189 INFO L471 AbstractCegarLoop]: Abstraction has 536 states and 746 transitions. [2025-03-16 17:56:33,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 746 transitions. [2025-03-16 17:56:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 17:56:33,190 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:56:33,190 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:56:33,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-16 17:56:33,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-03-16 17:56:33,390 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:56:33,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:56:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1706086437, now seen corresponding path program 5 times [2025-03-16 17:56:33,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:56:33,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556567224] [2025-03-16 17:56:33,391 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:56:33,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:56:33,393 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 5 equivalence classes. [2025-03-16 17:56:33,408 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 17:56:33,408 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 17:56:33,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 17:56:33,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:56:33,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556567224] [2025-03-16 17:56:33,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556567224] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:56:33,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822007131] [2025-03-16 17:56:33,597 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:56:33,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:33,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:56:33,599 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:56:33,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 17:56:33,626 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 5 equivalence classes. [2025-03-16 17:56:33,726 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 17:56:33,726 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 17:56:33,726 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:33,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-16 17:56:33,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:56:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:56:33,932 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:56:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 17:56:34,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822007131] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:56:34,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:56:34,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 18] total 44 [2025-03-16 17:56:34,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286845185] [2025-03-16 17:56:34,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:56:34,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-16 17:56:34,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:56:34,372 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-16 17:56:34,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2025-03-16 17:56:34,372 INFO L87 Difference]: Start difference. First operand 536 states and 746 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:56:38,346 INFO L93 Difference]: Finished difference Result 884 states and 1332 transitions. [2025-03-16 17:56:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2025-03-16 17:56:38,347 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-16 17:56:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:56:38,350 INFO L225 Difference]: With dead ends: 884 [2025-03-16 17:56:38,350 INFO L226 Difference]: Without dead ends: 799 [2025-03-16 17:56:38,351 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6106 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4417, Invalid=13139, Unknown=0, NotChecked=0, Total=17556 [2025-03-16 17:56:38,351 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 286 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 2781 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 3157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 2781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:56:38,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 372 Invalid, 3157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 2781 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-16 17:56:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2025-03-16 17:56:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 556. [2025-03-16 17:56:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 1.3963963963963963) internal successors, (775), 555 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 775 transitions. [2025-03-16 17:56:38,711 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 775 transitions. Word has length 33 [2025-03-16 17:56:38,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:56:38,711 INFO L471 AbstractCegarLoop]: Abstraction has 556 states and 775 transitions. [2025-03-16 17:56:38,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 775 transitions. [2025-03-16 17:56:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 17:56:38,712 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:56:38,712 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:56:38,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-16 17:56:38,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-16 17:56:38,913 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:56:38,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:56:38,913 INFO L85 PathProgramCache]: Analyzing trace with hash -979642775, now seen corresponding path program 10 times [2025-03-16 17:56:38,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:56:38,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771701932] [2025-03-16 17:56:38,913 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:56:38,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:56:38,916 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-03-16 17:56:38,927 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 17:56:38,927 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:56:38,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 17:56:39,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:56:39,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771701932] [2025-03-16 17:56:39,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771701932] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:56:39,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186672816] [2025-03-16 17:56:39,065 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:56:39,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:39,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:56:39,067 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:56:39,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 17:56:39,091 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-03-16 17:56:39,106 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 17:56:39,106 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:56:39,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:39,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-16 17:56:39,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:56:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 17:56:39,160 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:56:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 17:56:39,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186672816] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:56:39,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:56:39,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2025-03-16 17:56:39,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129642709] [2025-03-16 17:56:39,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:56:39,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 17:56:39,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:56:39,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 17:56:39,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:56:39,285 INFO L87 Difference]: Start difference. First operand 556 states and 775 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:39,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:56:39,937 INFO L93 Difference]: Finished difference Result 759 states and 1030 transitions. [2025-03-16 17:56:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 17:56:39,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-16 17:56:39,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:56:39,940 INFO L225 Difference]: With dead ends: 759 [2025-03-16 17:56:39,940 INFO L226 Difference]: Without dead ends: 731 [2025-03-16 17:56:39,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 19 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:56:39,941 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:56:39,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 88 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:56:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2025-03-16 17:56:40,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 552. [2025-03-16 17:56:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.411978221415608) internal successors, (778), 551 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 778 transitions. [2025-03-16 17:56:40,285 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 778 transitions. Word has length 33 [2025-03-16 17:56:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:56:40,285 INFO L471 AbstractCegarLoop]: Abstraction has 552 states and 778 transitions. [2025-03-16 17:56:40,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 778 transitions. [2025-03-16 17:56:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 17:56:40,286 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:56:40,286 INFO L218 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:56:40,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-16 17:56:40,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-16 17:56:40,490 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:56:40,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:56:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1176506132, now seen corresponding path program 11 times [2025-03-16 17:56:40,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:56:40,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832029339] [2025-03-16 17:56:40,490 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:56:40,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:56:40,494 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 34 statements into 7 equivalence classes. [2025-03-16 17:56:40,508 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 17:56:40,508 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 17:56:40,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 17:56:40,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:56:40,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832029339] [2025-03-16 17:56:40,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832029339] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:56:40,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272987268] [2025-03-16 17:56:40,715 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:56:40,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:40,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:56:40,716 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:56:40,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-16 17:56:40,743 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 34 statements into 7 equivalence classes. [2025-03-16 17:56:40,771 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 17:56:40,771 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 17:56:40,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:40,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-16 17:56:40,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:56:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 17:56:40,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:56:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-03-16 17:56:41,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272987268] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:56:41,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:56:41,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 11] total 33 [2025-03-16 17:56:41,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805359503] [2025-03-16 17:56:41,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:56:41,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-16 17:56:41,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:56:41,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-16 17:56:41,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 17:56:41,127 INFO L87 Difference]: Start difference. First operand 552 states and 778 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:56:43,763 INFO L93 Difference]: Finished difference Result 1119 states and 1668 transitions. [2025-03-16 17:56:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2025-03-16 17:56:43,763 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-03-16 17:56:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:56:43,766 INFO L225 Difference]: With dead ends: 1119 [2025-03-16 17:56:43,766 INFO L226 Difference]: Without dead ends: 845 [2025-03-16 17:56:43,767 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3166 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1132, Invalid=9788, Unknown=0, NotChecked=0, Total=10920 [2025-03-16 17:56:43,767 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 95 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 17:56:43,767 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 517 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2153 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 17:56:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2025-03-16 17:56:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 607. [2025-03-16 17:56:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 1.386138613861386) internal successors, (840), 606 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 840 transitions. [2025-03-16 17:56:44,125 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 840 transitions. Word has length 34 [2025-03-16 17:56:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:56:44,125 INFO L471 AbstractCegarLoop]: Abstraction has 607 states and 840 transitions. [2025-03-16 17:56:44,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 840 transitions. [2025-03-16 17:56:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-16 17:56:44,126 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:56:44,126 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:56:44,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-16 17:56:44,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:44,330 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:56:44,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:56:44,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1729355112, now seen corresponding path program 6 times [2025-03-16 17:56:44,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:56:44,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792475753] [2025-03-16 17:56:44,330 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:56:44,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:56:44,333 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 35 statements into 5 equivalence classes. [2025-03-16 17:56:44,344 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 17:56:44,344 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 17:56:44,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2025-03-16 17:56:44,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:56:44,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792475753] [2025-03-16 17:56:44,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792475753] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:56:44,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361303797] [2025-03-16 17:56:44,460 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:56:44,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:44,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:56:44,462 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:56:44,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-16 17:56:44,488 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 35 statements into 5 equivalence classes. [2025-03-16 17:56:44,548 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 17:56:44,548 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 17:56:44,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:44,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-16 17:56:44,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:56:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2025-03-16 17:56:44,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:56:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2025-03-16 17:56:44,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361303797] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:56:44,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:56:44,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2025-03-16 17:56:44,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478357] [2025-03-16 17:56:44,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:56:44,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 17:56:44,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:56:44,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 17:56:44,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2025-03-16 17:56:44,963 INFO L87 Difference]: Start difference. First operand 607 states and 840 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:56:52,988 INFO L93 Difference]: Finished difference Result 1726 states and 2307 transitions. [2025-03-16 17:56:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2025-03-16 17:56:52,989 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-03-16 17:56:52,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:56:52,993 INFO L225 Difference]: With dead ends: 1726 [2025-03-16 17:56:52,993 INFO L226 Difference]: Without dead ends: 1648 [2025-03-16 17:56:52,994 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 59 SyntacticMatches, 16 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15208 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3222, Invalid=33834, Unknown=0, NotChecked=0, Total=37056 [2025-03-16 17:56:52,995 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 353 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-03-16 17:56:52,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 225 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-03-16 17:56:52,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2025-03-16 17:56:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 631. [2025-03-16 17:56:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 1.3412698412698412) internal successors, (845), 630 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:53,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 845 transitions. [2025-03-16 17:56:53,400 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 845 transitions. Word has length 35 [2025-03-16 17:56:53,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:56:53,400 INFO L471 AbstractCegarLoop]: Abstraction has 631 states and 845 transitions. [2025-03-16 17:56:53,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:56:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 845 transitions. [2025-03-16 17:56:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 17:56:53,401 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:56:53,401 INFO L218 NwaCegarLoop]: trace histogram [12, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:56:53,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-16 17:56:53,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-16 17:56:53,601 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:56:53,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:56:53,601 INFO L85 PathProgramCache]: Analyzing trace with hash 18308425, now seen corresponding path program 12 times [2025-03-16 17:56:53,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:56:53,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981136478] [2025-03-16 17:56:53,602 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:56:53,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:56:53,604 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 7 equivalence classes. [2025-03-16 17:56:53,622 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 17:56:53,622 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 17:56:53,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-16 17:56:53,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:56:53,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981136478] [2025-03-16 17:56:53,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981136478] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:56:53,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3606665] [2025-03-16 17:56:53,800 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:56:53,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:56:53,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:56:53,801 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:56:53,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-16 17:56:53,827 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 7 equivalence classes. [2025-03-16 17:56:53,878 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 17:56:53,878 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 17:56:53,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:56:53,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 17:56:53,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:56:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-16 17:56:54,013 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:56:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-16 17:56:54,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3606665] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:56:54,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:56:54,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 23 [2025-03-16 17:56:54,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040713547] [2025-03-16 17:56:54,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:56:54,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 17:56:54,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:56:54,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 17:56:54,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2025-03-16 17:56:54,195 INFO L87 Difference]: Start difference. First operand 631 states and 845 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:57:05,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:57:05,339 INFO L93 Difference]: Finished difference Result 2220 states and 3082 transitions. [2025-03-16 17:57:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 397 states. [2025-03-16 17:57:05,339 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-16 17:57:05,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:57:05,344 INFO L225 Difference]: With dead ends: 2220 [2025-03-16 17:57:05,344 INFO L226 Difference]: Without dead ends: 1975 [2025-03-16 17:57:05,348 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 74 SyntacticMatches, 12 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69734 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=5290, Invalid=151922, Unknown=0, NotChecked=0, Total=157212 [2025-03-16 17:57:05,349 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 435 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 4243 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 4810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 4243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:57:05,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 1193 Invalid, 4810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 4243 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2025-03-16 17:57:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2025-03-16 17:57:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 758. [2025-03-16 17:57:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 1.3223249669749009) internal successors, (1001), 757 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:57:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1001 transitions. [2025-03-16 17:57:05,861 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1001 transitions. Word has length 37 [2025-03-16 17:57:05,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:57:05,861 INFO L471 AbstractCegarLoop]: Abstraction has 758 states and 1001 transitions. [2025-03-16 17:57:05,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:57:05,862 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1001 transitions. [2025-03-16 17:57:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 17:57:05,863 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:57:05,863 INFO L218 NwaCegarLoop]: trace histogram [13, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:57:05,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-16 17:57:06,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-16 17:57:06,063 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:57:06,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:57:06,064 INFO L85 PathProgramCache]: Analyzing trace with hash -390458887, now seen corresponding path program 13 times [2025-03-16 17:57:06,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:57:06,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775826756] [2025-03-16 17:57:06,064 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:57:06,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:57:06,066 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 17:57:06,074 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 17:57:06,074 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:57:06,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:57:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-16 17:57:06,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:57:06,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775826756] [2025-03-16 17:57:06,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775826756] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:57:06,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456869857] [2025-03-16 17:57:06,301 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:57:06,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:57:06,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:57:06,303 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:57:06,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-16 17:57:06,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 17:57:06,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 17:57:06,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:57:06,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:57:06,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-16 17:57:06,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:57:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 17:57:06,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:57:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2025-03-16 17:57:06,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456869857] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:57:06,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:57:06,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 10] total 33 [2025-03-16 17:57:06,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924123563] [2025-03-16 17:57:06,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:57:06,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-16 17:57:06,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:57:06,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-16 17:57:06,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 17:57:06,590 INFO L87 Difference]: Start difference. First operand 758 states and 1001 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:57:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:57:08,013 INFO L93 Difference]: Finished difference Result 1531 states and 2174 transitions. [2025-03-16 17:57:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-03-16 17:57:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-16 17:57:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:57:08,017 INFO L225 Difference]: With dead ends: 1531 [2025-03-16 17:57:08,017 INFO L226 Difference]: Without dead ends: 1255 [2025-03-16 17:57:08,017 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1876, Unknown=0, NotChecked=0, Total=2450 [2025-03-16 17:57:08,018 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 280 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 17:57:08,018 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 713 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 17:57:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2025-03-16 17:57:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 830. [2025-03-16 17:57:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.3401688781664656) internal successors, (1111), 829 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:57:08,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1111 transitions. [2025-03-16 17:57:08,553 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1111 transitions. Word has length 38 [2025-03-16 17:57:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:57:08,553 INFO L471 AbstractCegarLoop]: Abstraction has 830 states and 1111 transitions. [2025-03-16 17:57:08,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:57:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1111 transitions. [2025-03-16 17:57:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 17:57:08,554 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:57:08,554 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:57:08,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-03-16 17:57:08,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:57:08,754 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:57:08,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:57:08,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2080860500, now seen corresponding path program 7 times [2025-03-16 17:57:08,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:57:08,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725394910] [2025-03-16 17:57:08,755 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:57:08,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:57:08,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 17:57:08,764 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 17:57:08,764 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:57:08,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:57:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:57:09,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:57:09,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725394910] [2025-03-16 17:57:09,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725394910] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:57:09,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476852853] [2025-03-16 17:57:09,010 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:57:09,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:57:09,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:57:09,015 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:57:09,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-16 17:57:09,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 17:57:09,053 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 17:57:09,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:57:09,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:57:09,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-16 17:57:09,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:57:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-16 17:57:09,311 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:57:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-16 17:57:09,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476852853] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:57:09,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:57:09,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 33 [2025-03-16 17:57:09,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245054651] [2025-03-16 17:57:09,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:57:09,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-16 17:57:09,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:57:09,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-16 17:57:09,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 17:57:09,713 INFO L87 Difference]: Start difference. First operand 830 states and 1111 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)