./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 798a7b37 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-?-798a7b3-m [2025-03-03 13:37:14,678 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:37:14,734 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:37:14,740 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:37:14,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:37:14,763 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:37:14,764 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:37:14,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:37:14,765 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:37:14,765 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:37:14,765 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:37:14,765 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:37:14,766 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:37:14,766 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:37:14,766 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:37:14,766 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:37:14,766 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:37:14,766 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:37:14,767 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:37:14,767 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:37:14,767 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:37:14,767 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:37:14,767 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:37:14,767 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:37:14,767 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:37:14,767 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:37:14,767 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:37:14,767 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:37:14,767 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:37:14,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:37:14,768 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:37:14,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:37:14,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:37:14,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:37:14,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:37:14,768 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:37:14,769 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:37:14,769 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:37:14,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:37:14,769 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:37:14,769 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:37:14,769 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:37:14,769 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:37:14,769 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 [2025-03-03 13:37:14,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:37:14,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:37:15,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:37:15,003 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:37:15,003 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:37:15,005 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de62.c [2025-03-03 13:37:16,116 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d6d0440/7014c7019bf048f58e291cc07a04d076/FLAG21aba6e92 [2025-03-03 13:37:16,380 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:37:16,381 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.c [2025-03-03 13:37:16,387 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d6d0440/7014c7019bf048f58e291cc07a04d076/FLAG21aba6e92 [2025-03-03 13:37:16,701 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d6d0440/7014c7019bf048f58e291cc07a04d076 [2025-03-03 13:37:16,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:37:16,703 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:37:16,704 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:37:16,704 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:37:16,708 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:37:16,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5224d853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16, skipping insertion in model container [2025-03-03 13:37:16,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,719 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:37:16,817 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] [2025-03-03 13:37:16,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:37:16,837 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:37:16,844 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] [2025-03-03 13:37:16,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:37:16,862 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:37:16,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16 WrapperNode [2025-03-03 13:37:16,864 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:37:16,865 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:37:16,865 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:37:16,865 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:37:16,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,875 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,886 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2025-03-03 13:37:16,887 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:37:16,887 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:37:16,888 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:37:16,888 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:37:16,894 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,894 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,906 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]. [2025-03-03 13:37:16,906 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,907 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,909 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,910 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,911 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,912 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:37:16,912 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:37:16,913 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:37:16,913 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:37:16,913 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (1/1) ... [2025-03-03 13:37:16,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:37:16,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:16,940 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) [2025-03-03 13:37:16,948 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 [2025-03-03 13:37:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:37:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:37:16,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:37:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:37:17,003 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:37:17,005 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:37:17,113 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-03 13:37:17,113 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:37:17,118 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:37:17,119 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:37:17,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:37:17 BoogieIcfgContainer [2025-03-03 13:37:17,119 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:37:17,121 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:37:17,121 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:37:17,124 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:37:17,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:37:16" (1/3) ... [2025-03-03 13:37:17,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8c91ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:37:17, skipping insertion in model container [2025-03-03 13:37:17,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:37:16" (2/3) ... [2025-03-03 13:37:17,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8c91ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:37:17, skipping insertion in model container [2025-03-03 13:37:17,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:37:17" (3/3) ... [2025-03-03 13:37:17,126 INFO L128 eAbstractionObserver]: Analyzing ICFG in-de62.c [2025-03-03 13:37:17,136 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:37:17,137 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG in-de62.c that has 1 procedures, 15 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-03 13:37:17,174 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:37:17,181 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;@64c748ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:37:17,182 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:37:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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) [2025-03-03 13:37:17,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 13:37:17,187 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:17,188 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:17,188 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:17,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash 532135705, now seen corresponding path program 1 times [2025-03-03 13:37:17,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:17,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44859122] [2025-03-03 13:37:17,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:17,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:17,246 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 13:37:17,263 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 13:37:17,264 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:17,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:37:17,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:17,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44859122] [2025-03-03 13:37:17,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44859122] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:37:17,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:37:17,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 13:37:17,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412725106] [2025-03-03 13:37:17,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:37:17,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 13:37:17,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:17,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 13:37:17,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 13:37:17,460 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2025-03-03 13:37:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:17,504 INFO L93 Difference]: Finished difference Result 31 states and 46 transitions. [2025-03-03 13:37:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 13:37:17,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 [2025-03-03 13:37:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:17,510 INFO L225 Difference]: With dead ends: 31 [2025-03-03 13:37:17,510 INFO L226 Difference]: Without dead ends: 16 [2025-03-03 13:37:17,511 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 13:37:17,514 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35 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 [2025-03-03 13:37:17,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 35 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:37:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-03-03 13:37:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-03-03 13:37:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2025-03-03 13:37:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 24 transitions. [2025-03-03 13:37:17,538 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 24 transitions. Word has length 10 [2025-03-03 13:37:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:17,539 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 24 transitions. [2025-03-03 13:37:17,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2025-03-03 13:37:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 24 transitions. [2025-03-03 13:37:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 13:37:17,541 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:17,541 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:17,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 13:37:17,541 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:17,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:17,542 INFO L85 PathProgramCache]: Analyzing trace with hash -684494519, now seen corresponding path program 1 times [2025-03-03 13:37:17,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:17,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964184006] [2025-03-03 13:37:17,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:17,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:17,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 13:37:17,551 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 13:37:17,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:17,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:37:17,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:17,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964184006] [2025-03-03 13:37:17,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964184006] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:37:17,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:37:17,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 13:37:17,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523398229] [2025-03-03 13:37:17,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:37:17,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 13:37:17,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:17,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 13:37:17,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 13:37:17,585 INFO L87 Difference]: Start difference. First operand 16 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2025-03-03 13:37:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:17,605 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2025-03-03 13:37:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 13:37:17,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2025-03-03 13:37:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:17,606 INFO L225 Difference]: With dead ends: 26 [2025-03-03 13:37:17,606 INFO L226 Difference]: Without dead ends: 21 [2025-03-03 13:37:17,606 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 [2025-03-03 13:37:17,607 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 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 [2025-03-03 13:37:17,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:37:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-03 13:37:17,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-03-03 13:37:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 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) [2025-03-03 13:37:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 32 transitions. [2025-03-03 13:37:17,612 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 32 transitions. Word has length 11 [2025-03-03 13:37:17,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:17,612 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 32 transitions. [2025-03-03 13:37:17,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2025-03-03 13:37:17,612 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 32 transitions. [2025-03-03 13:37:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 13:37:17,613 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:17,613 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:17,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 13:37:17,613 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:17,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:17,613 INFO L85 PathProgramCache]: Analyzing trace with hash -683630580, now seen corresponding path program 1 times [2025-03-03 13:37:17,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:17,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691403564] [2025-03-03 13:37:17,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:17,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:17,622 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 13:37:17,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 13:37:17,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:17,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:37:17,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:17,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691403564] [2025-03-03 13:37:17,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691403564] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:37:17,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:37:17,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 13:37:17,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975634628] [2025-03-03 13:37:17,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:37:17,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 13:37:17,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:17,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 13:37:17,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 13:37:17,658 INFO L87 Difference]: Start difference. First operand 21 states and 32 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2025-03-03 13:37:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:17,692 INFO L93 Difference]: Finished difference Result 44 states and 70 transitions. [2025-03-03 13:37:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 13:37:17,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2025-03-03 13:37:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:17,694 INFO L225 Difference]: With dead ends: 44 [2025-03-03 13:37:17,694 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 13:37:17,694 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 [2025-03-03 13:37:17,695 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:17,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:37:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 13:37:17,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-03-03 13:37:17,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 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) [2025-03-03 13:37:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 43 transitions. [2025-03-03 13:37:17,705 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 43 transitions. Word has length 11 [2025-03-03 13:37:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:17,705 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 43 transitions. [2025-03-03 13:37:17,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2025-03-03 13:37:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 43 transitions. [2025-03-03 13:37:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-03 13:37:17,705 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:17,706 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:17,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-03 13:37:17,706 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:17,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1233117452, now seen corresponding path program 1 times [2025-03-03 13:37:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:17,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960713188] [2025-03-03 13:37:17,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:17,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:17,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 13:37:17,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 13:37:17,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:17,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:37:17,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:17,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960713188] [2025-03-03 13:37:17,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960713188] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:37:17,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:37:17,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 13:37:17,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556859422] [2025-03-03 13:37:17,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:37:17,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 13:37:17,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:17,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 13:37:17,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 13:37:17,776 INFO L87 Difference]: Start difference. First operand 29 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-03-03 13:37:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:17,811 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2025-03-03 13:37:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 13:37:17,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 [2025-03-03 13:37:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:17,812 INFO L225 Difference]: With dead ends: 37 [2025-03-03 13:37:17,812 INFO L226 Difference]: Without dead ends: 26 [2025-03-03 13:37:17,812 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:37:17,812 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 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 [2025-03-03 13:37:17,813 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:37:17,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-03 13:37:17,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-03 13:37:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 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) [2025-03-03 13:37:17,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2025-03-03 13:37:17,817 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 13 [2025-03-03 13:37:17,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:17,817 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2025-03-03 13:37:17,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-03-03 13:37:17,817 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2025-03-03 13:37:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-03 13:37:17,817 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:17,817 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:17,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-03 13:37:17,818 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:17,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash -38024148, now seen corresponding path program 1 times [2025-03-03 13:37:17,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:17,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52123787] [2025-03-03 13:37:17,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:17,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:17,822 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 13:37:17,826 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 13:37:17,827 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:17,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:37:17,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:17,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52123787] [2025-03-03 13:37:17,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52123787] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:17,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919562236] [2025-03-03 13:37:17,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:17,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:17,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:17,888 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) [2025-03-03 13:37:17,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:37:17,916 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 13:37:17,938 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 13:37:17,938 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:17,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:17,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 13:37:17,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:37:17,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:37:18,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919562236] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:18,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:37:18,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2025-03-03 13:37:18,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642659379] [2025-03-03 13:37:18,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:37:18,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 13:37:18,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:18,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 13:37:18,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:37:18,017 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-03-03 13:37:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:18,045 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2025-03-03 13:37:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 13:37:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 [2025-03-03 13:37:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:18,046 INFO L225 Difference]: With dead ends: 32 [2025-03-03 13:37:18,046 INFO L226 Difference]: Without dead ends: 23 [2025-03-03 13:37:18,046 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:37:18,047 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:18,047 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:37:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-03 13:37:18,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-03-03 13:37:18,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2025-03-03 13:37:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2025-03-03 13:37:18,052 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 13 [2025-03-03 13:37:18,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:18,053 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2025-03-03 13:37:18,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-03-03 13:37:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2025-03-03 13:37:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-03 13:37:18,056 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:18,056 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:18,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 13:37:18,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:18,256 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:18,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1992378886, now seen corresponding path program 1 times [2025-03-03 13:37:18,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:18,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437631077] [2025-03-03 13:37:18,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:18,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:18,262 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 13:37:18,270 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 13:37:18,271 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:18,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:37:18,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:18,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437631077] [2025-03-03 13:37:18,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437631077] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:18,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10100829] [2025-03-03 13:37:18,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:18,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:18,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:18,343 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) [2025-03-03 13:37:18,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:37:18,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 13:37:18,375 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 13:37:18,375 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:18,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:18,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 13:37:18,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 13:37:18,419 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 13:37:18,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10100829] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:18,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:18,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-03-03 13:37:18,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249808135] [2025-03-03 13:37:18,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:18,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 13:37:18,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:18,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 13:37:18,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:37:18,443 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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) [2025-03-03 13:37:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:18,525 INFO L93 Difference]: Finished difference Result 67 states and 107 transitions. [2025-03-03 13:37:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:37:18,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 [2025-03-03 13:37:18,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:18,528 INFO L225 Difference]: With dead ends: 67 [2025-03-03 13:37:18,528 INFO L226 Difference]: Without dead ends: 54 [2025-03-03 13:37:18,528 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:37:18,528 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:18,528 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:37:18,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-03 13:37:18,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2025-03-03 13:37:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 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) [2025-03-03 13:37:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 52 transitions. [2025-03-03 13:37:18,541 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 52 transitions. Word has length 14 [2025-03-03 13:37:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:18,542 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 52 transitions. [2025-03-03 13:37:18,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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) [2025-03-03 13:37:18,542 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 52 transitions. [2025-03-03 13:37:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-03 13:37:18,542 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:18,542 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:18,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 13:37:18,742 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 [2025-03-03 13:37:18,743 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:18,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:18,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1383751641, now seen corresponding path program 1 times [2025-03-03 13:37:18,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:18,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864029820] [2025-03-03 13:37:18,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:18,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:18,746 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 13:37:18,750 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 13:37:18,750 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:18,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 13:37:18,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:18,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864029820] [2025-03-03 13:37:18,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864029820] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:18,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864459914] [2025-03-03 13:37:18,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:18,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:18,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:18,788 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) [2025-03-03 13:37:18,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:37:18,807 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 13:37:18,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 13:37:18,814 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:18,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:18,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 13:37:18,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:37:18,844 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 13:37:18,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864459914] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:18,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:18,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2025-03-03 13:37:18,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153026908] [2025-03-03 13:37:18,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:18,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 13:37:18,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:18,885 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 13:37:18,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:37:18,885 INFO L87 Difference]: Start difference. First operand 35 states and 52 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2025-03-03 13:37:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:19,004 INFO L93 Difference]: Finished difference Result 131 states and 221 transitions. [2025-03-03 13:37:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 13:37:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 14 [2025-03-03 13:37:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:19,006 INFO L225 Difference]: With dead ends: 131 [2025-03-03 13:37:19,006 INFO L226 Difference]: Without dead ends: 108 [2025-03-03 13:37:19,006 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:37:19,006 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:19,006 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 74 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:37:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-03 13:37:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 78. [2025-03-03 13:37:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.5324675324675325) internal successors, (118), 77 states have internal predecessors, (118), 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) [2025-03-03 13:37:19,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 118 transitions. [2025-03-03 13:37:19,030 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 118 transitions. Word has length 14 [2025-03-03 13:37:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:19,030 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 118 transitions. [2025-03-03 13:37:19,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2025-03-03 13:37:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 118 transitions. [2025-03-03 13:37:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-03 13:37:19,031 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:19,031 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:19,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 13:37:19,232 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 [2025-03-03 13:37:19,232 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:19,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:19,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1859179495, now seen corresponding path program 1 times [2025-03-03 13:37:19,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:19,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718994328] [2025-03-03 13:37:19,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:19,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:19,240 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-03 13:37:19,244 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-03 13:37:19,244 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:19,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:37:19,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:19,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718994328] [2025-03-03 13:37:19,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718994328] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:19,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756638467] [2025-03-03 13:37:19,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:19,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:19,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:19,312 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) [2025-03-03 13:37:19,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:37:19,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-03 13:37:19,340 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-03 13:37:19,340 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:19,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:19,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-03 13:37:19,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:37:19,353 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:37:19,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756638467] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:19,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:19,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2025-03-03 13:37:19,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993563102] [2025-03-03 13:37:19,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:19,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 13:37:19,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:19,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 13:37:19,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-03 13:37:19,400 INFO L87 Difference]: Start difference. First operand 78 states and 118 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2025-03-03 13:37:19,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:19,623 INFO L93 Difference]: Finished difference Result 150 states and 227 transitions. [2025-03-03 13:37:19,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 13:37:19,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 15 [2025-03-03 13:37:19,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:19,624 INFO L225 Difference]: With dead ends: 150 [2025-03-03 13:37:19,625 INFO L226 Difference]: Without dead ends: 117 [2025-03-03 13:37:19,626 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2025-03-03 13:37:19,626 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:19,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 48 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:37:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-03-03 13:37:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2025-03-03 13:37:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 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) [2025-03-03 13:37:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 141 transitions. [2025-03-03 13:37:19,647 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 141 transitions. Word has length 15 [2025-03-03 13:37:19,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:19,648 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 141 transitions. [2025-03-03 13:37:19,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2025-03-03 13:37:19,648 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 141 transitions. [2025-03-03 13:37:19,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-03 13:37:19,648 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:19,648 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:19,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 13:37:19,848 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 [2025-03-03 13:37:19,849 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:19,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:19,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1773239137, now seen corresponding path program 1 times [2025-03-03 13:37:19,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:19,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115542138] [2025-03-03 13:37:19,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:19,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:19,853 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 13:37:19,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 13:37:19,862 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:19,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:37:19,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:19,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115542138] [2025-03-03 13:37:19,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115542138] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:19,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167748714] [2025-03-03 13:37:19,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:19,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:19,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:19,978 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) [2025-03-03 13:37:19,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:37:20,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 13:37:20,019 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 13:37:20,019 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:20,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:20,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 13:37:20,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:37:20,071 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:37:20,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167748714] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:20,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:20,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2025-03-03 13:37:20,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106310787] [2025-03-03 13:37:20,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:20,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 13:37:20,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:20,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 13:37:20,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:37:20,103 INFO L87 Difference]: Start difference. First operand 97 states and 141 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2025-03-03 13:37:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:20,161 INFO L93 Difference]: Finished difference Result 124 states and 181 transitions. [2025-03-03 13:37:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:37:20,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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 [2025-03-03 13:37:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:20,163 INFO L225 Difference]: With dead ends: 124 [2025-03-03 13:37:20,163 INFO L226 Difference]: Without dead ends: 111 [2025-03-03 13:37:20,163 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:37:20,164 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35 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 [2025-03-03 13:37:20,164 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 35 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:37:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-03-03 13:37:20,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2025-03-03 13:37:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.5161290322580645) internal successors, (141), 93 states have internal predecessors, (141), 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) [2025-03-03 13:37:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 141 transitions. [2025-03-03 13:37:20,187 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 141 transitions. Word has length 16 [2025-03-03 13:37:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:20,187 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 141 transitions. [2025-03-03 13:37:20,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2025-03-03 13:37:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 141 transitions. [2025-03-03 13:37:20,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-03 13:37:20,188 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:20,188 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:20,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 13:37:20,388 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 [2025-03-03 13:37:20,389 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:20,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:20,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1280126036, now seen corresponding path program 2 times [2025-03-03 13:37:20,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:20,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017275288] [2025-03-03 13:37:20,390 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:37:20,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:20,395 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-03 13:37:20,403 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 13:37:20,404 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:37:20,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 13:37:20,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017275288] [2025-03-03 13:37:20,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017275288] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535887068] [2025-03-03 13:37:20,508 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:37:20,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:20,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:20,512 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) [2025-03-03 13:37:20,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:37:20,541 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-03 13:37:20,551 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 13:37:20,551 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:37:20,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:20,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 13:37:20,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 13:37:20,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 13:37:20,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535887068] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:20,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:20,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2025-03-03 13:37:20,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152791576] [2025-03-03 13:37:20,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:20,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:37:20,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:20,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:37:20,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:37:20,634 INFO L87 Difference]: Start difference. First operand 94 states and 141 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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) [2025-03-03 13:37:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:20,788 INFO L93 Difference]: Finished difference Result 133 states and 200 transitions. [2025-03-03 13:37:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 13:37:20,788 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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 [2025-03-03 13:37:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:20,789 INFO L225 Difference]: With dead ends: 133 [2025-03-03 13:37:20,789 INFO L226 Difference]: Without dead ends: 89 [2025-03-03 13:37:20,790 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:37:20,790 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:20,791 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 53 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:37:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-03 13:37:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2025-03-03 13:37:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.5) internal successors, (120), 80 states have internal predecessors, (120), 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) [2025-03-03 13:37:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 120 transitions. [2025-03-03 13:37:20,813 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 120 transitions. Word has length 17 [2025-03-03 13:37:20,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:20,813 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 120 transitions. [2025-03-03 13:37:20,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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) [2025-03-03 13:37:20,814 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 120 transitions. [2025-03-03 13:37:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-03 13:37:20,814 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:20,814 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:20,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 13:37:21,015 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 [2025-03-03 13:37:21,015 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:21,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:21,015 INFO L85 PathProgramCache]: Analyzing trace with hash -341619368, now seen corresponding path program 3 times [2025-03-03 13:37:21,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:21,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117423893] [2025-03-03 13:37:21,015 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:37:21,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:21,019 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-03 13:37:21,024 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 13:37:21,024 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-03 13:37:21,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:37:21,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:21,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117423893] [2025-03-03 13:37:21,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117423893] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:21,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352463065] [2025-03-03 13:37:21,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:37:21,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:21,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:21,148 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) [2025-03-03 13:37:21,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:37:21,176 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-03 13:37:21,188 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 13:37:21,188 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-03 13:37:21,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:21,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-03 13:37:21,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 13:37:21,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 13:37:21,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352463065] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:21,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:21,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2025-03-03 13:37:21,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693204363] [2025-03-03 13:37:21,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:21,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 13:37:21,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:21,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 13:37:21,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:37:21,350 INFO L87 Difference]: Start difference. First operand 81 states and 120 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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) [2025-03-03 13:37:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:21,680 INFO L93 Difference]: Finished difference Result 138 states and 205 transitions. [2025-03-03 13:37:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:37:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 18 [2025-03-03 13:37:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:21,681 INFO L225 Difference]: With dead ends: 138 [2025-03-03 13:37:21,681 INFO L226 Difference]: Without dead ends: 98 [2025-03-03 13:37:21,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:37:21,682 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:21,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 77 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:37:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-03 13:37:21,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2025-03-03 13:37:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4166666666666667) internal successors, (119), 84 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) [2025-03-03 13:37:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 119 transitions. [2025-03-03 13:37:21,696 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 119 transitions. Word has length 18 [2025-03-03 13:37:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:21,696 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 119 transitions. [2025-03-03 13:37:21,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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) [2025-03-03 13:37:21,696 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 119 transitions. [2025-03-03 13:37:21,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-03 13:37:21,696 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:21,696 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:21,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 13:37:21,901 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 [2025-03-03 13:37:21,901 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:21,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:21,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1015058186, now seen corresponding path program 2 times [2025-03-03 13:37:21,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:21,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311837642] [2025-03-03 13:37:21,902 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:37:21,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:21,905 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-03 13:37:21,910 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 13:37:21,910 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:37:21,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-03 13:37:22,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:22,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311837642] [2025-03-03 13:37:22,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311837642] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:22,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39345310] [2025-03-03 13:37:22,015 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:37:22,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:22,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:22,018 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) [2025-03-03 13:37:22,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 13:37:22,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-03 13:37:22,051 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 13:37:22,051 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:37:22,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:22,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 13:37:22,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:37:22,090 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-03 13:37:22,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39345310] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:22,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:22,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 16 [2025-03-03 13:37:22,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220906116] [2025-03-03 13:37:22,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:22,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:37:22,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:22,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:37:22,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2025-03-03 13:37:22,192 INFO L87 Difference]: Start difference. First operand 85 states and 119 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2025-03-03 13:37:22,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:22,461 INFO L93 Difference]: Finished difference Result 239 states and 372 transitions. [2025-03-03 13:37:22,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 13:37:22,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) Word has length 20 [2025-03-03 13:37:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:22,464 INFO L225 Difference]: With dead ends: 239 [2025-03-03 13:37:22,464 INFO L226 Difference]: Without dead ends: 193 [2025-03-03 13:37:22,465 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:37:22,466 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:22,467 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 109 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:37:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2025-03-03 13:37:22,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 129. [2025-03-03 13:37:22,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.453125) internal successors, (186), 128 states have internal predecessors, (186), 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) [2025-03-03 13:37:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 186 transitions. [2025-03-03 13:37:22,490 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 186 transitions. Word has length 20 [2025-03-03 13:37:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:22,490 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 186 transitions. [2025-03-03 13:37:22,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2025-03-03 13:37:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 186 transitions. [2025-03-03 13:37:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-03 13:37:22,491 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:22,492 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:22,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 13:37:22,692 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 [2025-03-03 13:37:22,692 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:22,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash -430671287, now seen corresponding path program 2 times [2025-03-03 13:37:22,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:22,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791098737] [2025-03-03 13:37:22,693 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:37:22,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:22,698 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-03 13:37:22,711 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 13:37:22,712 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:37:22,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 13:37:22,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:22,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791098737] [2025-03-03 13:37:22,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791098737] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:22,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331131252] [2025-03-03 13:37:22,818 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:37:22,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:22,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:22,821 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) [2025-03-03 13:37:22,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 13:37:22,842 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-03 13:37:22,851 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 13:37:22,852 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:37:22,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:22,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 13:37:22,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 13:37:22,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 13:37:22,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331131252] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:22,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:22,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2025-03-03 13:37:22,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389091328] [2025-03-03 13:37:22,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:22,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 13:37:22,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:22,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 13:37:22,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:37:22,946 INFO L87 Difference]: Start difference. First operand 129 states and 186 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2025-03-03 13:37:23,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:23,147 INFO L93 Difference]: Finished difference Result 208 states and 311 transitions. [2025-03-03 13:37:23,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:37:23,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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 21 [2025-03-03 13:37:23,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:23,151 INFO L225 Difference]: With dead ends: 208 [2025-03-03 13:37:23,151 INFO L226 Difference]: Without dead ends: 170 [2025-03-03 13:37:23,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2025-03-03 13:37:23,152 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:23,152 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 87 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:37:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2025-03-03 13:37:23,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 156. [2025-03-03 13:37:23,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.4258064516129032) internal successors, (221), 155 states have internal predecessors, (221), 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) [2025-03-03 13:37:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 221 transitions. [2025-03-03 13:37:23,178 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 221 transitions. Word has length 21 [2025-03-03 13:37:23,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:23,178 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 221 transitions. [2025-03-03 13:37:23,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2025-03-03 13:37:23,178 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 221 transitions. [2025-03-03 13:37:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-03 13:37:23,179 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:23,179 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:23,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 13:37:23,379 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 [2025-03-03 13:37:23,379 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:23,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:23,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1174319050, now seen corresponding path program 3 times [2025-03-03 13:37:23,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:23,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595729033] [2025-03-03 13:37:23,380 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:37:23,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:23,384 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-03-03 13:37:23,397 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 13:37:23,397 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:37:23,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-03 13:37:23,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:23,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595729033] [2025-03-03 13:37:23,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595729033] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:23,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49361090] [2025-03-03 13:37:23,471 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:37:23,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:23,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:23,472 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) [2025-03-03 13:37:23,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 13:37:23,497 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-03-03 13:37:23,509 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 13:37:23,509 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:37:23,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:23,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-03 13:37:23,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-03 13:37:23,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-03 13:37:23,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49361090] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:23,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:23,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 24 [2025-03-03 13:37:23,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800023765] [2025-03-03 13:37:23,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:23,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 13:37:23,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:23,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 13:37:23,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2025-03-03 13:37:23,745 INFO L87 Difference]: Start difference. First operand 156 states and 221 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 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) [2025-03-03 13:37:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:27,426 INFO L93 Difference]: Finished difference Result 495 states and 767 transitions. [2025-03-03 13:37:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2025-03-03 13:37:27,427 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 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) Word has length 22 [2025-03-03 13:37:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:27,428 INFO L225 Difference]: With dead ends: 495 [2025-03-03 13:37:27,428 INFO L226 Difference]: Without dead ends: 385 [2025-03-03 13:37:27,435 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9234 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3118, Invalid=20138, Unknown=0, NotChecked=0, Total=23256 [2025-03-03 13:37:27,436 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 617 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:27,436 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 172 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 13:37:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2025-03-03 13:37:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2025-03-03 13:37:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.4291845493562232) internal successors, (333), 233 states have internal predecessors, (333), 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) [2025-03-03 13:37:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 333 transitions. [2025-03-03 13:37:27,497 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 333 transitions. Word has length 22 [2025-03-03 13:37:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:27,497 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 333 transitions. [2025-03-03 13:37:27,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 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) [2025-03-03 13:37:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 333 transitions. [2025-03-03 13:37:27,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-03 13:37:27,498 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:27,498 INFO L218 NwaCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:27,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 13:37:27,698 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 [2025-03-03 13:37:27,699 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:27,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:27,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1686389689, now seen corresponding path program 1 times [2025-03-03 13:37:27,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:27,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485131911] [2025-03-03 13:37:27,699 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:27,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:27,703 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-03 13:37:27,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 13:37:27,711 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:27,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 13:37:27,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:27,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485131911] [2025-03-03 13:37:27,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485131911] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:27,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688606371] [2025-03-03 13:37:27,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:37:27,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:27,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:27,820 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) [2025-03-03 13:37:27,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 13:37:27,841 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-03 13:37:27,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 13:37:27,851 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:37:27,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:27,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 13:37:27,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:37:27,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-03 13:37:27,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688606371] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:27,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:27,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 6] total 18 [2025-03-03 13:37:27,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8865183] [2025-03-03 13:37:27,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:27,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 13:37:27,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:27,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 13:37:27,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2025-03-03 13:37:27,945 INFO L87 Difference]: Start difference. First operand 234 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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) [2025-03-03 13:37:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:28,316 INFO L93 Difference]: Finished difference Result 530 states and 785 transitions. [2025-03-03 13:37:28,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 13:37:28,316 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 22 [2025-03-03 13:37:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:28,318 INFO L225 Difference]: With dead ends: 530 [2025-03-03 13:37:28,318 INFO L226 Difference]: Without dead ends: 397 [2025-03-03 13:37:28,319 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:37:28,319 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:28,319 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 262 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:37:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2025-03-03 13:37:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 342. [2025-03-03 13:37:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.4428152492668622) internal successors, (492), 341 states have internal predecessors, (492), 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) [2025-03-03 13:37:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 492 transitions. [2025-03-03 13:37:28,392 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 492 transitions. Word has length 22 [2025-03-03 13:37:28,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:28,392 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 492 transitions. [2025-03-03 13:37:28,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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) [2025-03-03 13:37:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 492 transitions. [2025-03-03 13:37:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 13:37:28,393 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:28,393 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:28,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 13:37:28,593 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 [2025-03-03 13:37:28,593 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:28,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:28,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1448124799, now seen corresponding path program 3 times [2025-03-03 13:37:28,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:28,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547250511] [2025-03-03 13:37:28,594 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:37:28,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:28,597 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-03-03 13:37:28,615 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 13:37:28,616 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:37:28,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-03 13:37:28,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:28,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547250511] [2025-03-03 13:37:28,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547250511] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:28,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444427937] [2025-03-03 13:37:28,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:37:28,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:28,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:28,703 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) [2025-03-03 13:37:28,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 13:37:28,729 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-03-03 13:37:28,743 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 13:37:28,743 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:37:28,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:28,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 13:37:28,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-03 13:37:28,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-03 13:37:28,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444427937] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:28,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:28,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2025-03-03 13:37:28,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84491985] [2025-03-03 13:37:28,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:28,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 13:37:28,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:28,847 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 13:37:28,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-03 13:37:28,848 INFO L87 Difference]: Start difference. First operand 342 states and 492 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2025-03-03 13:37:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:29,447 INFO L93 Difference]: Finished difference Result 820 states and 1195 transitions. [2025-03-03 13:37:29,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:37:29,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 24 [2025-03-03 13:37:29,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:29,450 INFO L225 Difference]: With dead ends: 820 [2025-03-03 13:37:29,450 INFO L226 Difference]: Without dead ends: 711 [2025-03-03 13:37:29,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:37:29,451 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:29,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 82 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:37:29,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2025-03-03 13:37:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 413. [2025-03-03 13:37:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.4393203883495145) internal successors, (593), 412 states have internal predecessors, (593), 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) [2025-03-03 13:37:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 593 transitions. [2025-03-03 13:37:29,547 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 593 transitions. Word has length 24 [2025-03-03 13:37:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:29,547 INFO L471 AbstractCegarLoop]: Abstraction has 413 states and 593 transitions. [2025-03-03 13:37:29,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2025-03-03 13:37:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 593 transitions. [2025-03-03 13:37:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-03 13:37:29,548 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:29,548 INFO L218 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:29,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 13:37:29,748 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 [2025-03-03 13:37:29,749 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:29,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:29,749 INFO L85 PathProgramCache]: Analyzing trace with hash -517917108, now seen corresponding path program 2 times [2025-03-03 13:37:29,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:29,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754958809] [2025-03-03 13:37:29,749 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:37:29,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:29,752 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-03 13:37:29,757 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:37:29,757 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:37:29,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 13:37:29,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:29,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754958809] [2025-03-03 13:37:29,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754958809] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:29,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208608038] [2025-03-03 13:37:29,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:37:29,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:29,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:29,928 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) [2025-03-03 13:37:29,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 13:37:29,953 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-03 13:37:29,963 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:37:29,963 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:37:29,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:29,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:37:29,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 13:37:29,991 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-03 13:37:30,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208608038] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:30,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:30,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 5] total 19 [2025-03-03 13:37:30,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268814055] [2025-03-03 13:37:30,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:30,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 13:37:30,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:30,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 13:37:30,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:37:30,052 INFO L87 Difference]: Start difference. First operand 413 states and 593 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2025-03-03 13:37:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:30,541 INFO L93 Difference]: Finished difference Result 840 states and 1246 transitions. [2025-03-03 13:37:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:37:30,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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 25 [2025-03-03 13:37:30,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:30,544 INFO L225 Difference]: With dead ends: 840 [2025-03-03 13:37:30,544 INFO L226 Difference]: Without dead ends: 689 [2025-03-03 13:37:30,544 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:37:30,545 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 105 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:30,545 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 281 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:37:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2025-03-03 13:37:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 536. [2025-03-03 13:37:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.4373831775700934) internal successors, (769), 535 states have internal predecessors, (769), 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) [2025-03-03 13:37:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 769 transitions. [2025-03-03 13:37:30,696 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 769 transitions. Word has length 25 [2025-03-03 13:37:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:30,696 INFO L471 AbstractCegarLoop]: Abstraction has 536 states and 769 transitions. [2025-03-03 13:37:30,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2025-03-03 13:37:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 769 transitions. [2025-03-03 13:37:30,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-03 13:37:30,697 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:30,697 INFO L218 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:30,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-03 13:37:30,897 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 [2025-03-03 13:37:30,898 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:30,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:30,898 INFO L85 PathProgramCache]: Analyzing trace with hash 673367436, now seen corresponding path program 4 times [2025-03-03 13:37:30,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:30,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249350390] [2025-03-03 13:37:30,900 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:37:30,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:30,904 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-03 13:37:30,909 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-03 13:37:30,910 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:37:30,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 13:37:31,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:31,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249350390] [2025-03-03 13:37:31,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249350390] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:31,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105493307] [2025-03-03 13:37:31,041 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:37:31,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:31,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:31,044 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) [2025-03-03 13:37:31,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 13:37:31,068 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-03 13:37:31,080 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-03 13:37:31,080 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:37:31,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:31,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-03 13:37:31,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 13:37:31,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-03 13:37:31,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105493307] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:31,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:31,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 7] total 21 [2025-03-03 13:37:31,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186307419] [2025-03-03 13:37:31,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:31,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:37:31,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:31,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:37:31,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2025-03-03 13:37:31,226 INFO L87 Difference]: Start difference. First operand 536 states and 769 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 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) [2025-03-03 13:37:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:31,780 INFO L93 Difference]: Finished difference Result 1015 states and 1519 transitions. [2025-03-03 13:37:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 13:37:31,780 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 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 [2025-03-03 13:37:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:31,783 INFO L225 Difference]: With dead ends: 1015 [2025-03-03 13:37:31,783 INFO L226 Difference]: Without dead ends: 825 [2025-03-03 13:37:31,785 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2025-03-03 13:37:31,785 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 139 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:31,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 362 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:37:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2025-03-03 13:37:31,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 657. [2025-03-03 13:37:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 1.4634146341463414) internal successors, (960), 656 states have internal predecessors, (960), 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) [2025-03-03 13:37:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 960 transitions. [2025-03-03 13:37:31,959 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 960 transitions. Word has length 27 [2025-03-03 13:37:31,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:31,959 INFO L471 AbstractCegarLoop]: Abstraction has 657 states and 960 transitions. [2025-03-03 13:37:31,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 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) [2025-03-03 13:37:31,960 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 960 transitions. [2025-03-03 13:37:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-03 13:37:31,960 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:31,961 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:31,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 13:37:32,161 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 [2025-03-03 13:37:32,161 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:32,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:32,162 INFO L85 PathProgramCache]: Analyzing trace with hash -987553759, now seen corresponding path program 5 times [2025-03-03 13:37:32,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:32,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462443774] [2025-03-03 13:37:32,162 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:37:32,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:32,165 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-03 13:37:32,192 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 13:37:32,192 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-03 13:37:32,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:37:32,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:32,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462443774] [2025-03-03 13:37:32,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462443774] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:32,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569551741] [2025-03-03 13:37:32,280 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:37:32,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:32,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:32,282 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) [2025-03-03 13:37:32,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 13:37:32,304 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-03 13:37:32,326 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 13:37:32,326 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-03 13:37:32,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:32,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 13:37:32,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 13:37:32,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 13:37:32,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569551741] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:32,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:32,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2025-03-03 13:37:32,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941404460] [2025-03-03 13:37:32,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:32,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 13:37:32,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:32,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 13:37:32,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:37:32,467 INFO L87 Difference]: Start difference. First operand 657 states and 960 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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) [2025-03-03 13:37:32,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:32,736 INFO L93 Difference]: Finished difference Result 765 states and 1081 transitions. [2025-03-03 13:37:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:37:32,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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 28 [2025-03-03 13:37:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:32,739 INFO L225 Difference]: With dead ends: 765 [2025-03-03 13:37:32,740 INFO L226 Difference]: Without dead ends: 742 [2025-03-03 13:37:32,740 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 15 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:37:32,740 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:32,740 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 91 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:37:32,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2025-03-03 13:37:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 631. [2025-03-03 13:37:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 1.480952380952381) internal successors, (933), 630 states have internal predecessors, (933), 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) [2025-03-03 13:37:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 933 transitions. [2025-03-03 13:37:32,875 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 933 transitions. Word has length 28 [2025-03-03 13:37:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:32,875 INFO L471 AbstractCegarLoop]: Abstraction has 631 states and 933 transitions. [2025-03-03 13:37:32,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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) [2025-03-03 13:37:32,876 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 933 transitions. [2025-03-03 13:37:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:37:32,876 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:32,876 INFO L218 NwaCegarLoop]: trace histogram [7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:32,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-03 13:37:33,077 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 [2025-03-03 13:37:33,077 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:33,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:33,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1035401837, now seen corresponding path program 4 times [2025-03-03 13:37:33,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:33,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290366465] [2025-03-03 13:37:33,077 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:37:33,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:33,080 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-03 13:37:33,085 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:37:33,086 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:37:33,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-03 13:37:33,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:33,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290366465] [2025-03-03 13:37:33,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290366465] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:33,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070716853] [2025-03-03 13:37:33,173 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:37:33,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:33,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:33,175 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) [2025-03-03 13:37:33,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 13:37:33,198 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-03 13:37:33,210 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:37:33,211 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:37:33,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:33,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-03 13:37:33,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-03 13:37:33,277 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-03 13:37:33,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070716853] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:33,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:33,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 28 [2025-03-03 13:37:33,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940657837] [2025-03-03 13:37:33,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:33,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 13:37:33,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:33,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 13:37:33,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2025-03-03 13:37:33,507 INFO L87 Difference]: Start difference. First operand 631 states and 933 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 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) [2025-03-03 13:37:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:43,395 INFO L93 Difference]: Finished difference Result 1394 states and 2094 transitions. [2025-03-03 13:37:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2025-03-03 13:37:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 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 [2025-03-03 13:37:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:43,399 INFO L225 Difference]: With dead ends: 1394 [2025-03-03 13:37:43,399 INFO L226 Difference]: Without dead ends: 1013 [2025-03-03 13:37:43,408 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31348 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=9056, Invalid=67396, Unknown=0, NotChecked=0, Total=76452 [2025-03-03 13:37:43,408 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 547 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:43,409 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 116 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-03 13:37:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2025-03-03 13:37:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 740. [2025-03-03 13:37:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.4208389715832206) internal successors, (1050), 739 states have internal predecessors, (1050), 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) [2025-03-03 13:37:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1050 transitions. [2025-03-03 13:37:43,715 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1050 transitions. Word has length 29 [2025-03-03 13:37:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:43,715 INFO L471 AbstractCegarLoop]: Abstraction has 740 states and 1050 transitions. [2025-03-03 13:37:43,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 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) [2025-03-03 13:37:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1050 transitions. [2025-03-03 13:37:43,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:37:43,715 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:43,715 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:43,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 13:37:43,916 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 [2025-03-03 13:37:43,916 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:43,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1154096360, now seen corresponding path program 4 times [2025-03-03 13:37:43,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:43,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399074490] [2025-03-03 13:37:43,916 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:37:43,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:43,919 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-03 13:37:43,925 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:37:43,925 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:37:43,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 13:37:44,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:44,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399074490] [2025-03-03 13:37:44,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399074490] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:44,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396418519] [2025-03-03 13:37:44,061 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:37:44,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:44,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:44,063 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) [2025-03-03 13:37:44,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 13:37:44,086 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-03 13:37:44,099 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:37:44,099 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:37:44,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:44,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:37:44,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 13:37:44,203 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 13:37:44,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396418519] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:44,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:44,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2025-03-03 13:37:44,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366031651] [2025-03-03 13:37:44,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:44,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:37:44,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:44,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:37:44,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2025-03-03 13:37:44,343 INFO L87 Difference]: Start difference. First operand 740 states and 1050 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 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) [2025-03-03 13:37:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:47,272 INFO L93 Difference]: Finished difference Result 1252 states and 1717 transitions. [2025-03-03 13:37:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2025-03-03 13:37:47,272 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 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 [2025-03-03 13:37:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:47,276 INFO L225 Difference]: With dead ends: 1252 [2025-03-03 13:37:47,276 INFO L226 Difference]: Without dead ends: 1066 [2025-03-03 13:37:47,277 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1173, Invalid=16649, Unknown=0, NotChecked=0, Total=17822 [2025-03-03 13:37:47,277 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 139 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:47,278 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 148 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-03 13:37:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2025-03-03 13:37:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 724. [2025-03-03 13:37:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 1.4190871369294606) internal successors, (1026), 723 states have internal predecessors, (1026), 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) [2025-03-03 13:37:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1026 transitions. [2025-03-03 13:37:47,549 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1026 transitions. Word has length 29 [2025-03-03 13:37:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:47,549 INFO L471 AbstractCegarLoop]: Abstraction has 724 states and 1026 transitions. [2025-03-03 13:37:47,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 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) [2025-03-03 13:37:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1026 transitions. [2025-03-03 13:37:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-03 13:37:47,550 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:47,550 INFO L218 NwaCegarLoop]: trace histogram [9, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:47,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-03 13:37:47,755 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 [2025-03-03 13:37:47,755 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:47,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:47,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1268401014, now seen corresponding path program 5 times [2025-03-03 13:37:47,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:47,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239230128] [2025-03-03 13:37:47,755 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:37:47,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:47,759 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 6 equivalence classes. [2025-03-03 13:37:47,779 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:37:47,779 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-03 13:37:47,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-03 13:37:47,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:47,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239230128] [2025-03-03 13:37:47,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239230128] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:47,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767618666] [2025-03-03 13:37:47,896 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:37:47,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:47,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:47,898 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) [2025-03-03 13:37:47,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 13:37:47,923 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 6 equivalence classes. [2025-03-03 13:37:47,958 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:37:47,959 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-03 13:37:47,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:47,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-03 13:37:47,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 13:37:48,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-03 13:37:48,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767618666] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:48,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:48,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 8] total 22 [2025-03-03 13:37:48,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640997057] [2025-03-03 13:37:48,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:48,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:37:48,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:48,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:37:48,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:37:48,099 INFO L87 Difference]: Start difference. First operand 724 states and 1026 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 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) [2025-03-03 13:37:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:49,377 INFO L93 Difference]: Finished difference Result 1234 states and 1797 transitions. [2025-03-03 13:37:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-03-03 13:37:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 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) Word has length 30 [2025-03-03 13:37:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:49,382 INFO L225 Difference]: With dead ends: 1234 [2025-03-03 13:37:49,382 INFO L226 Difference]: Without dead ends: 920 [2025-03-03 13:37:49,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=397, Invalid=2795, Unknown=0, NotChecked=0, Total=3192 [2025-03-03 13:37:49,384 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 92 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:49,384 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 560 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:37:49,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2025-03-03 13:37:49,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 744. [2025-03-03 13:37:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 1.4212651413189772) internal successors, (1056), 743 states have internal predecessors, (1056), 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) [2025-03-03 13:37:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1056 transitions. [2025-03-03 13:37:49,636 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1056 transitions. Word has length 30 [2025-03-03 13:37:49,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:49,637 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1056 transitions. [2025-03-03 13:37:49,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 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) [2025-03-03 13:37:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1056 transitions. [2025-03-03 13:37:49,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-03 13:37:49,637 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:49,638 INFO L218 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:49,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-03 13:37:49,838 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 [2025-03-03 13:37:49,838 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:49,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:49,838 INFO L85 PathProgramCache]: Analyzing trace with hash -549787095, now seen corresponding path program 5 times [2025-03-03 13:37:49,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:49,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635088675] [2025-03-03 13:37:49,839 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:37:49,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:49,841 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 5 equivalence classes. [2025-03-03 13:37:49,856 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 31 of 31 statements. [2025-03-03 13:37:49,856 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-03 13:37:49,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 13:37:50,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:50,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635088675] [2025-03-03 13:37:50,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635088675] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:50,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368437377] [2025-03-03 13:37:50,025 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:37:50,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:50,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:50,028 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) [2025-03-03 13:37:50,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 13:37:50,055 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 5 equivalence classes. [2025-03-03 13:37:50,117 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 31 of 31 statements. [2025-03-03 13:37:50,117 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-03 13:37:50,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:50,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-03 13:37:50,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 13:37:50,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-03 13:37:50,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368437377] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:50,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:50,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 9] total 36 [2025-03-03 13:37:50,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674060168] [2025-03-03 13:37:50,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:50,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-03 13:37:50,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:50,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-03 13:37:50,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:37:50,715 INFO L87 Difference]: Start difference. First operand 744 states and 1056 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 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) [2025-03-03 13:37:54,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:54,914 INFO L93 Difference]: Finished difference Result 1301 states and 1927 transitions. [2025-03-03 13:37:54,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2025-03-03 13:37:54,914 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 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 31 [2025-03-03 13:37:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:54,918 INFO L225 Difference]: With dead ends: 1301 [2025-03-03 13:37:54,918 INFO L226 Difference]: Without dead ends: 1088 [2025-03-03 13:37:54,919 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6506 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2620, Invalid=20030, Unknown=0, NotChecked=0, Total=22650 [2025-03-03 13:37:54,919 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 527 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 4386 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 4789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 4386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:54,919 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 967 Invalid, 4789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 4386 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-03 13:37:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2025-03-03 13:37:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 828. [2025-03-03 13:37:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 1.4292623941958889) internal successors, (1182), 827 states have internal predecessors, (1182), 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) [2025-03-03 13:37:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1182 transitions. [2025-03-03 13:37:55,306 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1182 transitions. Word has length 31 [2025-03-03 13:37:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:55,306 INFO L471 AbstractCegarLoop]: Abstraction has 828 states and 1182 transitions. [2025-03-03 13:37:55,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 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) [2025-03-03 13:37:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1182 transitions. [2025-03-03 13:37:55,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-03 13:37:55,307 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:55,307 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:55,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-03 13:37:55,507 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 [2025-03-03 13:37:55,508 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:55,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash -987585704, now seen corresponding path program 6 times [2025-03-03 13:37:55,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:55,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619890508] [2025-03-03 13:37:55,508 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:37:55,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:55,512 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 3 equivalence classes. [2025-03-03 13:37:55,525 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 13:37:55,525 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-03 13:37:55,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 13:37:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:55,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619890508] [2025-03-03 13:37:55,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619890508] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:55,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708725385] [2025-03-03 13:37:55,603 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:37:55,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:55,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:55,605 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) [2025-03-03 13:37:55,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 13:37:55,632 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 3 equivalence classes. [2025-03-03 13:37:55,655 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 13:37:55,655 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-03 13:37:55,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:55,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:37:55,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-03 13:37:55,712 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-03 13:37:55,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708725385] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:55,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:55,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2025-03-03 13:37:55,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978299170] [2025-03-03 13:37:55,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:55,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:37:55,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:55,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:37:55,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:37:55,800 INFO L87 Difference]: Start difference. First operand 828 states and 1182 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) [2025-03-03 13:37:56,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:56,846 INFO L93 Difference]: Finished difference Result 1621 states and 2302 transitions. [2025-03-03 13:37:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:37:56,847 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 32 [2025-03-03 13:37:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:56,851 INFO L225 Difference]: With dead ends: 1621 [2025-03-03 13:37:56,851 INFO L226 Difference]: Without dead ends: 1394 [2025-03-03 13:37:56,851 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2025-03-03 13:37:56,852 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 82 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:56,852 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 89 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:37:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2025-03-03 13:37:57,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 926. [2025-03-03 13:37:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.414054054054054) internal successors, (1308), 925 states have internal predecessors, (1308), 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) [2025-03-03 13:37:57,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1308 transitions. [2025-03-03 13:37:57,264 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1308 transitions. Word has length 32 [2025-03-03 13:37:57,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:57,265 INFO L471 AbstractCegarLoop]: Abstraction has 926 states and 1308 transitions. [2025-03-03 13:37:57,265 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) [2025-03-03 13:37:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1308 transitions. [2025-03-03 13:37:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-03 13:37:57,265 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:57,266 INFO L218 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:57,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-03 13:37:57,466 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 [2025-03-03 13:37:57,466 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:57,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:57,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1650273487, now seen corresponding path program 3 times [2025-03-03 13:37:57,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:57,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428686720] [2025-03-03 13:37:57,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:37:57,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:57,469 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 6 equivalence classes. [2025-03-03 13:37:57,474 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 26 of 32 statements. [2025-03-03 13:37:57,474 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:37:57,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2025-03-03 13:37:57,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:57,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428686720] [2025-03-03 13:37:57,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428686720] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:57,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924518711] [2025-03-03 13:37:57,514 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:37:57,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:57,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:57,516 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) [2025-03-03 13:37:57,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 13:37:57,542 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 6 equivalence classes. [2025-03-03 13:37:57,555 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 26 of 32 statements. [2025-03-03 13:37:57,555 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:37:57,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:57,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 13:37:57,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-03 13:37:57,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-03 13:37:57,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924518711] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:57,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:57,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-03-03 13:37:57,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968217518] [2025-03-03 13:37:57,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:57,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:37:57,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:57,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:37:57,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:37:57,704 INFO L87 Difference]: Start difference. First operand 926 states and 1308 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2025-03-03 13:37:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:37:58,596 INFO L93 Difference]: Finished difference Result 1228 states and 1755 transitions. [2025-03-03 13:37:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 13:37:58,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 32 [2025-03-03 13:37:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:37:58,600 INFO L225 Difference]: With dead ends: 1228 [2025-03-03 13:37:58,600 INFO L226 Difference]: Without dead ends: 1225 [2025-03-03 13:37:58,600 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:37:58,601 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:37:58,601 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 106 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:37:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2025-03-03 13:37:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 994. [2025-03-03 13:37:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 1.4350453172205437) internal successors, (1425), 993 states have internal predecessors, (1425), 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) [2025-03-03 13:37:58,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1425 transitions. [2025-03-03 13:37:58,962 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1425 transitions. Word has length 32 [2025-03-03 13:37:58,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:37:58,962 INFO L471 AbstractCegarLoop]: Abstraction has 994 states and 1425 transitions. [2025-03-03 13:37:58,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2025-03-03 13:37:58,962 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1425 transitions. [2025-03-03 13:37:58,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 13:37:58,963 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:37:58,963 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:37:58,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-03 13:37:59,165 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 [2025-03-03 13:37:59,165 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:37:59,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:37:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1358345064, now seen corresponding path program 6 times [2025-03-03 13:37:59,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:37:59,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44812588] [2025-03-03 13:37:59,166 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:37:59,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:37:59,168 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 5 equivalence classes. [2025-03-03 13:37:59,176 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:37:59,176 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-03 13:37:59,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:37:59,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:37:59,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44812588] [2025-03-03 13:37:59,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44812588] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:37:59,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388198171] [2025-03-03 13:37:59,402 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:37:59,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:37:59,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:37:59,404 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) [2025-03-03 13:37:59,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-03 13:37:59,429 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 5 equivalence classes. [2025-03-03 13:37:59,455 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:37:59,455 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-03 13:37:59,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:37:59,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-03 13:37:59,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:37:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-03 13:37:59,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:37:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-03 13:37:59,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388198171] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:37:59,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:37:59,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 10] total 29 [2025-03-03 13:37:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347115199] [2025-03-03 13:37:59,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:37:59,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 13:37:59,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:37:59,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 13:37:59,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2025-03-03 13:37:59,951 INFO L87 Difference]: Start difference. First operand 994 states and 1425 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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) [2025-03-03 13:38:10,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:38:10,137 INFO L93 Difference]: Finished difference Result 1835 states and 2516 transitions. [2025-03-03 13:38:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 271 states. [2025-03-03 13:38:10,138 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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 [2025-03-03 13:38:10,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:38:10,142 INFO L225 Difference]: With dead ends: 1835 [2025-03-03 13:38:10,142 INFO L226 Difference]: Without dead ends: 1629 [2025-03-03 13:38:10,144 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 50 SyntacticMatches, 14 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35063 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=4889, Invalid=78343, Unknown=0, NotChecked=0, Total=83232 [2025-03-03 13:38:10,144 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 337 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 3573 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 4132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 3573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-03-03 13:38:10,144 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 146 Invalid, 4132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 3573 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-03-03 13:38:10,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2025-03-03 13:38:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 884. [2025-03-03 13:38:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 1.4099660249150623) internal successors, (1245), 883 states have internal predecessors, (1245), 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) [2025-03-03 13:38:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1245 transitions. [2025-03-03 13:38:10,555 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1245 transitions. Word has length 33 [2025-03-03 13:38:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:38:10,555 INFO L471 AbstractCegarLoop]: Abstraction has 884 states and 1245 transitions. [2025-03-03 13:38:10,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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) [2025-03-03 13:38:10,555 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1245 transitions. [2025-03-03 13:38:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-03 13:38:10,556 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:38:10,556 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:38:10,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-03 13:38:10,761 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 [2025-03-03 13:38:10,763 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:38:10,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:38:10,763 INFO L85 PathProgramCache]: Analyzing trace with hash 742384281, now seen corresponding path program 7 times [2025-03-03 13:38:10,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:38:10,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408549261] [2025-03-03 13:38:10,763 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:38:10,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:38:10,766 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-03 13:38:10,777 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 13:38:10,777 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:38:10,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:38:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-03 13:38:10,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:38:10,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408549261] [2025-03-03 13:38:10,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408549261] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:38:10,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285022781] [2025-03-03 13:38:10,902 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:38:10,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:38:10,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:38:10,904 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) [2025-03-03 13:38:10,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-03 13:38:10,931 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-03 13:38:10,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 13:38:10,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:38:10,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:38:10,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-03 13:38:10,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:38:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-03 13:38:11,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:38:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-03 13:38:11,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285022781] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:38:11,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:38:11,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-03-03 13:38:11,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306707309] [2025-03-03 13:38:11,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:38:11,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-03 13:38:11,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:38:11,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-03 13:38:11,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-03-03 13:38:11,120 INFO L87 Difference]: Start difference. First operand 884 states and 1245 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2025-03-03 13:38:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:38:11,834 INFO L93 Difference]: Finished difference Result 1120 states and 1540 transitions. [2025-03-03 13:38:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 13:38:11,834 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 34 [2025-03-03 13:38:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:38:11,838 INFO L225 Difference]: With dead ends: 1120 [2025-03-03 13:38:11,838 INFO L226 Difference]: Without dead ends: 1092 [2025-03-03 13:38:11,838 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 18 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-03-03 13:38:11,838 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:38:11,839 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:38:11,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2025-03-03 13:38:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 875. [2025-03-03 13:38:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.4176201372997712) internal successors, (1239), 874 states have internal predecessors, (1239), 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) [2025-03-03 13:38:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1239 transitions. [2025-03-03 13:38:12,264 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1239 transitions. Word has length 34 [2025-03-03 13:38:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:38:12,264 INFO L471 AbstractCegarLoop]: Abstraction has 875 states and 1239 transitions. [2025-03-03 13:38:12,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2025-03-03 13:38:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1239 transitions. [2025-03-03 13:38:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-03 13:38:12,265 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:38:12,265 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:38:12,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-03 13:38:12,466 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 [2025-03-03 13:38:12,466 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:38:12,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:38:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash 741894745, now seen corresponding path program 6 times [2025-03-03 13:38:12,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:38:12,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932058836] [2025-03-03 13:38:12,466 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:38:12,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:38:12,469 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 34 statements into 6 equivalence classes. [2025-03-03 13:38:12,483 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 30 of 34 statements. [2025-03-03 13:38:12,483 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-03 13:38:12,483 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:38:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2025-03-03 13:38:12,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:38:12,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932058836] [2025-03-03 13:38:12,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932058836] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:38:12,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542110067] [2025-03-03 13:38:12,549 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:38:12,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:38:12,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:38:12,551 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) [2025-03-03 13:38:12,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-03 13:38:12,579 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 34 statements into 6 equivalence classes. [2025-03-03 13:38:12,601 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 30 of 34 statements. [2025-03-03 13:38:12,602 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-03 13:38:12,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:38:12,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 13:38:12,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:38:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-03 13:38:12,640 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:38:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-03 13:38:12,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542110067] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:38:12,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:38:12,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2025-03-03 13:38:12,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242112201] [2025-03-03 13:38:12,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:38:12,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 13:38:12,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:38:12,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 13:38:12,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:38:12,691 INFO L87 Difference]: Start difference. First operand 875 states and 1239 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2025-03-03 13:38:13,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:38:13,535 INFO L93 Difference]: Finished difference Result 1166 states and 1646 transitions. [2025-03-03 13:38:13,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 13:38:13,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 34 [2025-03-03 13:38:13,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:38:13,539 INFO L225 Difference]: With dead ends: 1166 [2025-03-03 13:38:13,539 INFO L226 Difference]: Without dead ends: 1149 [2025-03-03 13:38:13,539 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2025-03-03 13:38:13,539 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:38:13,539 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 113 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:38:13,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2025-03-03 13:38:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 963. [2025-03-03 13:38:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.4147609147609148) internal successors, (1361), 962 states have internal predecessors, (1361), 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) [2025-03-03 13:38:13,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1361 transitions. [2025-03-03 13:38:13,989 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1361 transitions. Word has length 34 [2025-03-03 13:38:13,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:38:13,989 INFO L471 AbstractCegarLoop]: Abstraction has 963 states and 1361 transitions. [2025-03-03 13:38:13,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2025-03-03 13:38:13,990 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1361 transitions. [2025-03-03 13:38:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-03 13:38:13,991 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:38:13,991 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:38:13,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-03 13:38:14,191 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 [2025-03-03 13:38:14,191 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:38:14,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:38:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash 580080684, now seen corresponding path program 7 times [2025-03-03 13:38:14,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:38:14,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911354875] [2025-03-03 13:38:14,192 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:38:14,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:38:14,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-03 13:38:14,201 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 13:38:14,201 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:38:14,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:38:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-03 13:38:14,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:38:14,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911354875] [2025-03-03 13:38:14,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911354875] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:38:14,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171019743] [2025-03-03 13:38:14,337 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:38:14,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:38:14,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:38:14,339 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) [2025-03-03 13:38:14,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-03 13:38:14,365 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-03 13:38:14,382 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 13:38:14,383 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:38:14,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:38:14,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-03 13:38:14,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:38:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-03 13:38:14,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:38:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-03 13:38:14,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171019743] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:38:14,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:38:14,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 27 [2025-03-03 13:38:14,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496025053] [2025-03-03 13:38:14,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:38:14,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 13:38:14,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:38:14,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 13:38:14,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:38:14,584 INFO L87 Difference]: Start difference. First operand 963 states and 1361 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 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) [2025-03-03 13:38:16,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:38:16,008 INFO L93 Difference]: Finished difference Result 1125 states and 1616 transitions. [2025-03-03 13:38:16,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-03-03 13:38:16,009 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 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 [2025-03-03 13:38:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:38:16,012 INFO L225 Difference]: With dead ends: 1125 [2025-03-03 13:38:16,012 INFO L226 Difference]: Without dead ends: 947 [2025-03-03 13:38:16,012 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=436, Invalid=3224, Unknown=0, NotChecked=0, Total=3660 [2025-03-03 13:38:16,012 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 77 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:38:16,012 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 518 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:38:16,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2025-03-03 13:38:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 898. [2025-03-03 13:38:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 1.4336677814938685) internal successors, (1286), 897 states have internal predecessors, (1286), 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) [2025-03-03 13:38:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1286 transitions. [2025-03-03 13:38:16,435 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1286 transitions. Word has length 35 [2025-03-03 13:38:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:38:16,435 INFO L471 AbstractCegarLoop]: Abstraction has 898 states and 1286 transitions. [2025-03-03 13:38:16,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 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) [2025-03-03 13:38:16,435 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1286 transitions. [2025-03-03 13:38:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-03 13:38:16,436 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:38:16,436 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:38:16,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-03 13:38:16,637 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 [2025-03-03 13:38:16,637 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:38:16,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:38:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1377255245, now seen corresponding path program 7 times [2025-03-03 13:38:16,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:38:16,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520372473] [2025-03-03 13:38:16,637 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:38:16,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:38:16,640 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-03 13:38:16,646 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 13:38:16,646 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:38:16,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:38:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 13:38:16,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:38:16,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520372473] [2025-03-03 13:38:16,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520372473] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:38:16,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230040474] [2025-03-03 13:38:16,888 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:38:16,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:38:16,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:38:16,889 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) [2025-03-03 13:38:16,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-03 13:38:16,913 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-03 13:38:16,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 13:38:16,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:38:16,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:38:16,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-03 13:38:16,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:38:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 13:38:17,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:38:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 13:38:17,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230040474] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:38:17,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:38:17,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2025-03-03 13:38:17,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612134389] [2025-03-03 13:38:17,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:38:17,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-03 13:38:17,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:38:17,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-03 13:38:17,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:38:17,512 INFO L87 Difference]: Start difference. First operand 898 states and 1286 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 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) [2025-03-03 13:38:42,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:38:42,892 INFO L93 Difference]: Finished difference Result 3006 states and 4371 transitions. [2025-03-03 13:38:42,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 547 states. [2025-03-03 13:38:42,893 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 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 [2025-03-03 13:38:42,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:38:42,899 INFO L225 Difference]: With dead ends: 3006 [2025-03-03 13:38:42,899 INFO L226 Difference]: Without dead ends: 2446 [2025-03-03 13:38:42,910 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 54 SyntacticMatches, 18 SemanticMatches, 555 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140290 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=14635, Invalid=295057, Unknown=0, NotChecked=0, Total=309692 [2025-03-03 13:38:42,910 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 643 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 3758 mSolverCounterSat, 1116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 4874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1116 IncrementalHoareTripleChecker+Valid, 3758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:38:42,910 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 718 Invalid, 4874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1116 Valid, 3758 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2025-03-03 13:38:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2025-03-03 13:38:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 880. [2025-03-03 13:38:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.4175199089874857) internal successors, (1246), 879 states have internal predecessors, (1246), 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) [2025-03-03 13:38:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1246 transitions. [2025-03-03 13:38:43,411 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1246 transitions. Word has length 35 [2025-03-03 13:38:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:38:43,411 INFO L471 AbstractCegarLoop]: Abstraction has 880 states and 1246 transitions. [2025-03-03 13:38:43,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 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) [2025-03-03 13:38:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1246 transitions. [2025-03-03 13:38:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 13:38:43,412 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:38:43,412 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:38:43,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-03 13:38:43,612 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 [2025-03-03 13:38:43,612 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:38:43,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:38:43,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1260020232, now seen corresponding path program 8 times [2025-03-03 13:38:43,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:38:43,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72383944] [2025-03-03 13:38:43,613 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:38:43,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:38:43,615 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-03 13:38:43,623 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 13:38:43,623 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:38:43,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:38:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:38:43,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:38:43,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72383944] [2025-03-03 13:38:43,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72383944] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:38:43,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049416199] [2025-03-03 13:38:43,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:38:43,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:38:43,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:38:43,865 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) [2025-03-03 13:38:43,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-03 13:38:43,894 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-03 13:38:43,909 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 13:38:43,909 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:38:43,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:38:43,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:38:43,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:38:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2025-03-03 13:38:44,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:38:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2025-03-03 13:38:44,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049416199] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:38:44,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:38:44,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 40 [2025-03-03 13:38:44,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556768709] [2025-03-03 13:38:44,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:38:44,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-03 13:38:44,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:38:44,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-03 13:38:44,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 13:38:44,318 INFO L87 Difference]: Start difference. First operand 880 states and 1246 transitions. Second operand has 40 states, 40 states have (on average 1.65) internal successors, (66), 40 states have internal predecessors, (66), 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) [2025-03-03 13:38:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:38:48,123 INFO L93 Difference]: Finished difference Result 1594 states and 2459 transitions. [2025-03-03 13:38:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2025-03-03 13:38:48,124 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.65) internal successors, (66), 40 states have internal predecessors, (66), 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 36 [2025-03-03 13:38:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:38:48,128 INFO L225 Difference]: With dead ends: 1594 [2025-03-03 13:38:48,128 INFO L226 Difference]: Without dead ends: 1436 [2025-03-03 13:38:48,128 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2700, Invalid=12800, Unknown=0, NotChecked=0, Total=15500 [2025-03-03 13:38:48,129 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 462 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 3662 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 4027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 3662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:38:48,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 663 Invalid, 4027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 3662 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-03 13:38:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2025-03-03 13:38:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 715. [2025-03-03 13:38:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.3907563025210083) internal successors, (993), 714 states have internal predecessors, (993), 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) [2025-03-03 13:38:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 993 transitions. [2025-03-03 13:38:48,599 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 993 transitions. Word has length 36 [2025-03-03 13:38:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:38:48,599 INFO L471 AbstractCegarLoop]: Abstraction has 715 states and 993 transitions. [2025-03-03 13:38:48,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.65) internal successors, (66), 40 states have internal predecessors, (66), 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) [2025-03-03 13:38:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 993 transitions. [2025-03-03 13:38:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 13:38:48,600 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:38:48,600 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:38:48,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-03 13:38:48,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:38:48,801 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:38:48,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:38:48,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1437163404, now seen corresponding path program 8 times [2025-03-03 13:38:48,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:38:48,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884819065] [2025-03-03 13:38:48,801 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:38:48,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:38:48,804 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-03 13:38:48,811 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:38:48,811 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:38:48,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:38:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:38:49,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:38:49,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884819065] [2025-03-03 13:38:49,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884819065] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:38:49,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941064611] [2025-03-03 13:38:49,149 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:38:49,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:38:49,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:38:49,151 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:38:49,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-03 13:38:49,176 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-03 13:38:49,192 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:38:49,192 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:38:49,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:38:49,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-03 13:38:49,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:38:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 20 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 13:38:49,464 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:38:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 20 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 13:38:49,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941064611] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:38:49,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:38:49,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 13] total 37 [2025-03-03 13:38:49,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175608773] [2025-03-03 13:38:49,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:38:49,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-03 13:38:49,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:38:49,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-03 13:38:49,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:38:49,918 INFO L87 Difference]: Start difference. First operand 715 states and 993 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 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)