./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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/bitvector/soft_float_3a.c.cil.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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 00:53:37,703 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 00:53:37,756 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 00:53:37,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 00:53:37,764 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 00:53:37,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 00:53:37,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 00:53:37,787 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 00:53:37,788 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 00:53:37,788 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 00:53:37,788 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 00:53:37,789 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 00:53:37,789 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 00:53:37,789 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 00:53:37,789 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 00:53:37,789 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 00:53:37,789 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 00:53:37,789 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 00:53:37,789 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 00:53:37,789 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 00:53:37,789 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 00:53:37,789 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 00:53:37,789 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 00:53:37,790 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:53:37,790 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 00:53:37,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 00:53:37,790 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 -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2025-03-08 00:53:38,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 00:53:38,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 00:53:38,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 00:53:38,028 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 00:53:38,029 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 00:53:38,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2025-03-08 00:53:39,160 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca69e9d5/ca4894b842c24e7cb28c7b12e7d9ffbc/FLAG5d0c4db3f [2025-03-08 00:53:39,396 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 00:53:39,400 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2025-03-08 00:53:39,412 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca69e9d5/ca4894b842c24e7cb28c7b12e7d9ffbc/FLAG5d0c4db3f [2025-03-08 00:53:39,432 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca69e9d5/ca4894b842c24e7cb28c7b12e7d9ffbc [2025-03-08 00:53:39,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 00:53:39,437 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 00:53:39,438 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 00:53:39,439 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 00:53:39,442 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 00:53:39,443 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,444 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f3c22c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39, skipping insertion in model container [2025-03-08 00:53:39,445 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,461 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 00:53:39,562 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/bitvector/soft_float_3a.c.cil.c[728,741] [2025-03-08 00:53:39,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:53:39,619 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 00:53:39,625 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/bitvector/soft_float_3a.c.cil.c[728,741] [2025-03-08 00:53:39,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:53:39,670 INFO L204 MainTranslator]: Completed translation [2025-03-08 00:53:39,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39 WrapperNode [2025-03-08 00:53:39,671 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 00:53:39,672 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 00:53:39,672 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 00:53:39,672 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 00:53:39,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,684 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,706 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2025-03-08 00:53:39,707 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 00:53:39,707 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 00:53:39,707 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 00:53:39,707 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 00:53:39,713 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,716 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,733 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]. [2025-03-08 00:53:39,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,736 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,736 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,737 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,737 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,739 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 00:53:39,739 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 00:53:39,739 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 00:53:39,739 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 00:53:39,740 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (1/1) ... [2025-03-08 00:53:39,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:53:39,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:39,768 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) [2025-03-08 00:53:39,770 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 [2025-03-08 00:53:39,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 00:53:39,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 00:53:39,786 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2025-03-08 00:53:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2025-03-08 00:53:39,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 00:53:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 00:53:39,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-08 00:53:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-08 00:53:39,827 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 00:53:39,828 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 00:53:40,076 INFO L? ?]: Removed 66 outVars from TransFormulas that were not future-live. [2025-03-08 00:53:40,076 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 00:53:40,090 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 00:53:40,090 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 00:53:40,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:53:40 BoogieIcfgContainer [2025-03-08 00:53:40,091 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 00:53:40,093 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 00:53:40,093 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 00:53:40,097 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 00:53:40,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 12:53:39" (1/3) ... [2025-03-08 00:53:40,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8b1e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:53:40, skipping insertion in model container [2025-03-08 00:53:40,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:53:39" (2/3) ... [2025-03-08 00:53:40,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8b1e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:53:40, skipping insertion in model container [2025-03-08 00:53:40,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:53:40" (3/3) ... [2025-03-08 00:53:40,099 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2025-03-08 00:53:40,108 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 00:53:40,110 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_3a.c.cil.c that has 3 procedures, 72 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-08 00:53:40,144 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 00:53:40,151 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;@34b804cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 00:53:40,151 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 00:53:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 65 states have internal predecessors, (97), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:53:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-08 00:53:40,160 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:40,160 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:40,160 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:40,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:40,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1951708843, now seen corresponding path program 1 times [2025-03-08 00:53:40,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:40,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128188020] [2025-03-08 00:53:40,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:40,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:40,220 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-08 00:53:40,256 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-08 00:53:40,257 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:40,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 00:53:40,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:40,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128188020] [2025-03-08 00:53:40,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128188020] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:40,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:53:40,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 00:53:40,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157154486] [2025-03-08 00:53:40,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:40,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 00:53:40,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:40,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 00:53:40,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:53:40,423 INFO L87 Difference]: Start difference. First operand has 72 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 65 states have internal predecessors, (97), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:53:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:40,475 INFO L93 Difference]: Finished difference Result 142 states and 217 transitions. [2025-03-08 00:53:40,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 00:53:40,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2025-03-08 00:53:40,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:40,482 INFO L225 Difference]: With dead ends: 142 [2025-03-08 00:53:40,483 INFO L226 Difference]: Without dead ends: 66 [2025-03-08 00:53:40,486 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 [2025-03-08 00:53:40,490 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:40,490 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 185 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:53:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-08 00:53:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2025-03-08 00:53:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 00:53:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 94 transitions. [2025-03-08 00:53:40,523 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 94 transitions. Word has length 41 [2025-03-08 00:53:40,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:40,525 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 94 transitions. [2025-03-08 00:53:40,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:53:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 94 transitions. [2025-03-08 00:53:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-08 00:53:40,527 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:40,527 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:40,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 00:53:40,528 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:40,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:40,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1458584952, now seen corresponding path program 1 times [2025-03-08 00:53:40,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:40,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887810549] [2025-03-08 00:53:40,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:40,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:40,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-08 00:53:40,560 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 00:53:40,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:40,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 00:53:40,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:40,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887810549] [2025-03-08 00:53:40,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887810549] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:40,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:53:40,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 00:53:40,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717902147] [2025-03-08 00:53:40,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:40,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:53:40,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:40,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:53:40,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:53:40,713 INFO L87 Difference]: Start difference. First operand 66 states and 94 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:53:40,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:40,745 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2025-03-08 00:53:40,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:53:40,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2025-03-08 00:53:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:40,746 INFO L225 Difference]: With dead ends: 76 [2025-03-08 00:53:40,746 INFO L226 Difference]: Without dead ends: 66 [2025-03-08 00:53:40,747 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:53:40,747 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:40,747 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 256 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:53:40,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-08 00:53:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2025-03-08 00:53:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 00:53:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 93 transitions. [2025-03-08 00:53:40,755 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 93 transitions. Word has length 43 [2025-03-08 00:53:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:40,756 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 93 transitions. [2025-03-08 00:53:40,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:53:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 93 transitions. [2025-03-08 00:53:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-08 00:53:40,759 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:40,759 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:40,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 00:53:40,760 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:40,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:40,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1093572009, now seen corresponding path program 1 times [2025-03-08 00:53:40,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:40,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661211906] [2025-03-08 00:53:40,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:40,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:40,770 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-08 00:53:40,786 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 00:53:40,786 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:40,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:40,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:40,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661211906] [2025-03-08 00:53:40,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661211906] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:40,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635978847] [2025-03-08 00:53:40,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:40,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:40,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:40,881 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) [2025-03-08 00:53:40,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 00:53:40,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-08 00:53:40,944 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 00:53:40,945 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:40,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:40,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 00:53:40,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:53:40,980 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:53:40,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635978847] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:40,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:53:40,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-08 00:53:40,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260500107] [2025-03-08 00:53:40,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:40,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:53:40,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:40,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:53:40,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 00:53:40,982 INFO L87 Difference]: Start difference. First operand 66 states and 93 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:41,086 INFO L93 Difference]: Finished difference Result 148 states and 214 transitions. [2025-03-08 00:53:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 00:53:41,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2025-03-08 00:53:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:41,088 INFO L225 Difference]: With dead ends: 148 [2025-03-08 00:53:41,088 INFO L226 Difference]: Without dead ends: 85 [2025-03-08 00:53:41,088 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-08 00:53:41,089 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 19 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:41,089 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 199 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:53:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-08 00:53:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2025-03-08 00:53:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 70 states have internal predecessors, (99), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-08 00:53:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 110 transitions. [2025-03-08 00:53:41,095 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 110 transitions. Word has length 43 [2025-03-08 00:53:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:41,095 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 110 transitions. [2025-03-08 00:53:41,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 110 transitions. [2025-03-08 00:53:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-08 00:53:41,096 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:41,096 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:41,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:41,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:41,297 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:41,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:41,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1412763331, now seen corresponding path program 1 times [2025-03-08 00:53:41,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:41,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251152186] [2025-03-08 00:53:41,298 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:41,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:41,303 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-08 00:53:41,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 00:53:41,310 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:41,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:41,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:41,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251152186] [2025-03-08 00:53:41,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251152186] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:41,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842959645] [2025-03-08 00:53:41,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:41,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:41,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:41,369 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) [2025-03-08 00:53:41,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 00:53:41,406 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-08 00:53:41,424 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 00:53:41,424 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:41,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:41,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-08 00:53:41,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:53:41,458 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:53:41,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842959645] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:41,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:53:41,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-08 00:53:41,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825317311] [2025-03-08 00:53:41,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:41,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:53:41,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:41,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:53:41,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 00:53:41,459 INFO L87 Difference]: Start difference. First operand 78 states and 110 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:41,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:41,541 INFO L93 Difference]: Finished difference Result 163 states and 233 transitions. [2025-03-08 00:53:41,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:53:41,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2025-03-08 00:53:41,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:41,542 INFO L225 Difference]: With dead ends: 163 [2025-03-08 00:53:41,542 INFO L226 Difference]: Without dead ends: 92 [2025-03-08 00:53:41,542 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 00:53:41,543 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 14 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:41,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 215 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:53:41,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-08 00:53:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2025-03-08 00:53:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 74 states have internal predecessors, (103), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-08 00:53:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 116 transitions. [2025-03-08 00:53:41,549 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 116 transitions. Word has length 45 [2025-03-08 00:53:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:41,549 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 116 transitions. [2025-03-08 00:53:41,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 116 transitions. [2025-03-08 00:53:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-08 00:53:41,550 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:41,550 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:41,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:41,751 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,SelfDestructingSolverStorable3 [2025-03-08 00:53:41,751 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:41,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:41,751 INFO L85 PathProgramCache]: Analyzing trace with hash -30185104, now seen corresponding path program 1 times [2025-03-08 00:53:41,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:41,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19077165] [2025-03-08 00:53:41,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:41,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:41,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-08 00:53:41,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 00:53:41,759 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:41,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:41,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:41,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19077165] [2025-03-08 00:53:41,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19077165] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:41,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194105277] [2025-03-08 00:53:41,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:41,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:41,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:41,825 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) [2025-03-08 00:53:41,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 00:53:41,860 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-08 00:53:41,875 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 00:53:41,875 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:41,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:41,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-08 00:53:41,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:53:41,902 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:53:41,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194105277] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:41,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:53:41,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-08 00:53:41,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270261085] [2025-03-08 00:53:41,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:41,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:53:41,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:41,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:53:41,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 00:53:41,903 INFO L87 Difference]: Start difference. First operand 82 states and 116 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:41,956 INFO L93 Difference]: Finished difference Result 168 states and 241 transitions. [2025-03-08 00:53:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:53:41,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2025-03-08 00:53:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:41,957 INFO L225 Difference]: With dead ends: 168 [2025-03-08 00:53:41,957 INFO L226 Difference]: Without dead ends: 93 [2025-03-08 00:53:41,958 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 00:53:41,958 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 15 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:41,958 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 217 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:53:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-08 00:53:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2025-03-08 00:53:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 75 states have internal predecessors, (105), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-08 00:53:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2025-03-08 00:53:41,969 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 46 [2025-03-08 00:53:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:41,969 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2025-03-08 00:53:41,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2025-03-08 00:53:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-08 00:53:41,970 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:41,970 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:41,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:42,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:42,171 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:42,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:42,171 INFO L85 PathProgramCache]: Analyzing trace with hash 17666109, now seen corresponding path program 1 times [2025-03-08 00:53:42,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:42,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33289305] [2025-03-08 00:53:42,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:42,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:42,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-08 00:53:42,180 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 00:53:42,183 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:42,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:42,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:42,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33289305] [2025-03-08 00:53:42,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33289305] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:42,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409715875] [2025-03-08 00:53:42,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:42,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:42,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:42,253 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) [2025-03-08 00:53:42,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 00:53:42,283 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-08 00:53:42,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 00:53:42,298 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:42,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:42,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 00:53:42,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:53:42,327 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:53:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:42,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409715875] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:53:42,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:53:42,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-08 00:53:42,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426583760] [2025-03-08 00:53:42,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:53:42,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 00:53:42,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:42,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 00:53:42,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:53:42,411 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 00:53:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:42,538 INFO L93 Difference]: Finished difference Result 216 states and 317 transitions. [2025-03-08 00:53:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 00:53:42,538 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 47 [2025-03-08 00:53:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:42,539 INFO L225 Difference]: With dead ends: 216 [2025-03-08 00:53:42,539 INFO L226 Difference]: Without dead ends: 140 [2025-03-08 00:53:42,540 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2025-03-08 00:53:42,540 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 107 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:42,540 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 450 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:53:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2025-03-08 00:53:42,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2025-03-08 00:53:42,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.4705882352941178) internal successors, (125), 86 states have internal predecessors, (125), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-08 00:53:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 138 transitions. [2025-03-08 00:53:42,552 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 138 transitions. Word has length 47 [2025-03-08 00:53:42,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:42,553 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 138 transitions. [2025-03-08 00:53:42,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 00:53:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 138 transitions. [2025-03-08 00:53:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-08 00:53:42,557 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:42,557 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:42,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:42,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:42,758 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:42,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:42,758 INFO L85 PathProgramCache]: Analyzing trace with hash 936229618, now seen corresponding path program 1 times [2025-03-08 00:53:42,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:42,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980833476] [2025-03-08 00:53:42,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:42,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:42,763 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-08 00:53:42,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 00:53:42,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:42,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:42,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:42,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980833476] [2025-03-08 00:53:42,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980833476] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:42,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889961618] [2025-03-08 00:53:42,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:42,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:42,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:42,837 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) [2025-03-08 00:53:42,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 00:53:42,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-08 00:53:42,888 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 00:53:42,888 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:42,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:42,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 00:53:42,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:53:42,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:53:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:43,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889961618] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:53:43,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:53:43,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-08 00:53:43,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846596648] [2025-03-08 00:53:43,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:53:43,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 00:53:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:43,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 00:53:43,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:53:43,012 INFO L87 Difference]: Start difference. First operand 94 states and 138 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 00:53:43,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:43,129 INFO L93 Difference]: Finished difference Result 229 states and 343 transitions. [2025-03-08 00:53:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 00:53:43,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2025-03-08 00:53:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:43,131 INFO L225 Difference]: With dead ends: 229 [2025-03-08 00:53:43,132 INFO L226 Difference]: Without dead ends: 142 [2025-03-08 00:53:43,133 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2025-03-08 00:53:43,133 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 88 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:43,134 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 440 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:53:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-03-08 00:53:43,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2025-03-08 00:53:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 91 states have (on average 1.5054945054945055) internal successors, (137), 92 states have internal predecessors, (137), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-08 00:53:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 150 transitions. [2025-03-08 00:53:43,144 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 150 transitions. Word has length 48 [2025-03-08 00:53:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:43,144 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 150 transitions. [2025-03-08 00:53:43,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 00:53:43,145 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 150 transitions. [2025-03-08 00:53:43,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-08 00:53:43,147 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:43,147 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:43,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:43,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:43,348 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:43,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:43,348 INFO L85 PathProgramCache]: Analyzing trace with hash 809448724, now seen corresponding path program 1 times [2025-03-08 00:53:43,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:43,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202023203] [2025-03-08 00:53:43,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:43,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:43,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-08 00:53:43,358 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 00:53:43,359 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:43,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 00:53:43,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:43,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202023203] [2025-03-08 00:53:43,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202023203] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:43,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633263771] [2025-03-08 00:53:43,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:43,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:43,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:43,411 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) [2025-03-08 00:53:43,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 00:53:43,443 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-08 00:53:43,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 00:53:43,458 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:43,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:43,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-08 00:53:43,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-08 00:53:43,470 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:53:43,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633263771] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:43,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:53:43,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2025-03-08 00:53:43,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521497307] [2025-03-08 00:53:43,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:43,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 00:53:43,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:43,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 00:53:43,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:53:43,471 INFO L87 Difference]: Start difference. First operand 100 states and 150 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:43,509 INFO L93 Difference]: Finished difference Result 198 states and 304 transitions. [2025-03-08 00:53:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 00:53:43,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2025-03-08 00:53:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:43,510 INFO L225 Difference]: With dead ends: 198 [2025-03-08 00:53:43,511 INFO L226 Difference]: Without dead ends: 105 [2025-03-08 00:53:43,512 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:53:43,513 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:43,513 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 156 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:53:43,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-08 00:53:43,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2025-03-08 00:53:43,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.4886363636363635) internal successors, (131), 89 states have internal predecessors, (131), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-08 00:53:43,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 144 transitions. [2025-03-08 00:53:43,525 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 144 transitions. Word has length 50 [2025-03-08 00:53:43,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:43,526 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 144 transitions. [2025-03-08 00:53:43,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:43,526 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 144 transitions. [2025-03-08 00:53:43,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-08 00:53:43,527 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:43,528 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:43,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:43,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:43,733 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:43,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:43,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1284724704, now seen corresponding path program 1 times [2025-03-08 00:53:43,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:43,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975442156] [2025-03-08 00:53:43,734 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:43,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:43,739 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-08 00:53:43,744 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 00:53:43,744 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:43,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 00:53:43,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:43,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975442156] [2025-03-08 00:53:43,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975442156] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:43,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238664268] [2025-03-08 00:53:43,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:43,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:43,779 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) [2025-03-08 00:53:43,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 00:53:43,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-08 00:53:43,825 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 00:53:43,826 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:43,826 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:43,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-08 00:53:43,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-08 00:53:43,841 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:53:43,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238664268] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:43,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:53:43,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2025-03-08 00:53:43,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478142110] [2025-03-08 00:53:43,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:43,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 00:53:43,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:43,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 00:53:43,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:53:43,843 INFO L87 Difference]: Start difference. First operand 97 states and 144 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:43,885 INFO L93 Difference]: Finished difference Result 195 states and 296 transitions. [2025-03-08 00:53:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 00:53:43,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2025-03-08 00:53:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:43,886 INFO L225 Difference]: With dead ends: 195 [2025-03-08 00:53:43,887 INFO L226 Difference]: Without dead ends: 105 [2025-03-08 00:53:43,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:53:43,888 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:43,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 158 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:53:43,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-08 00:53:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 98. [2025-03-08 00:53:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 89 states have (on average 1.4719101123595506) internal successors, (131), 90 states have internal predecessors, (131), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-08 00:53:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 144 transitions. [2025-03-08 00:53:43,894 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 144 transitions. Word has length 50 [2025-03-08 00:53:43,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:43,894 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 144 transitions. [2025-03-08 00:53:43,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:43,894 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 144 transitions. [2025-03-08 00:53:43,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-08 00:53:43,895 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:43,895 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:43,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:44,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:44,096 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:44,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:44,096 INFO L85 PathProgramCache]: Analyzing trace with hash 783196775, now seen corresponding path program 1 times [2025-03-08 00:53:44,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:44,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227751695] [2025-03-08 00:53:44,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:44,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:44,101 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 00:53:44,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 00:53:44,110 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:44,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 00:53:44,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:44,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227751695] [2025-03-08 00:53:44,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227751695] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:44,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560097533] [2025-03-08 00:53:44,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:44,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:44,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:44,167 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) [2025-03-08 00:53:44,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 00:53:44,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 00:53:44,215 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 00:53:44,215 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:44,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:44,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 00:53:44,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-08 00:53:44,273 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:53:44,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560097533] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:44,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:53:44,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-08 00:53:44,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102714915] [2025-03-08 00:53:44,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:44,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 00:53:44,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:44,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 00:53:44,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:53:44,274 INFO L87 Difference]: Start difference. First operand 98 states and 144 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:44,319 INFO L93 Difference]: Finished difference Result 196 states and 292 transitions. [2025-03-08 00:53:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 00:53:44,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2025-03-08 00:53:44,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:44,320 INFO L225 Difference]: With dead ends: 196 [2025-03-08 00:53:44,320 INFO L226 Difference]: Without dead ends: 105 [2025-03-08 00:53:44,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:53:44,321 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 5 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:44,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 161 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:53:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-08 00:53:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2025-03-08 00:53:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 89 states have internal predecessors, (129), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-08 00:53:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 142 transitions. [2025-03-08 00:53:44,328 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 142 transitions. Word has length 51 [2025-03-08 00:53:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:44,328 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 142 transitions. [2025-03-08 00:53:44,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:44,328 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 142 transitions. [2025-03-08 00:53:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-08 00:53:44,329 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:44,329 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:44,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:44,533 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,SelfDestructingSolverStorable9 [2025-03-08 00:53:44,533 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:44,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:44,534 INFO L85 PathProgramCache]: Analyzing trace with hash 735351737, now seen corresponding path program 1 times [2025-03-08 00:53:44,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:44,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638833659] [2025-03-08 00:53:44,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:44,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:44,540 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 00:53:44,548 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 00:53:44,548 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:44,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:44,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:44,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638833659] [2025-03-08 00:53:44,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638833659] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:44,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801783593] [2025-03-08 00:53:44,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:44,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:44,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:44,646 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) [2025-03-08 00:53:44,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 00:53:44,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 00:53:44,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 00:53:44,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:44,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:44,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 00:53:44,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:53:44,851 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:53:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:53:45,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801783593] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:53:45,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:53:45,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 14] total 28 [2025-03-08 00:53:45,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900472671] [2025-03-08 00:53:45,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:53:45,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 00:53:45,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:45,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 00:53:45,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:53:45,212 INFO L87 Difference]: Start difference. First operand 97 states and 142 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 00:53:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:46,410 INFO L93 Difference]: Finished difference Result 331 states and 509 transitions. [2025-03-08 00:53:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-08 00:53:46,411 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 51 [2025-03-08 00:53:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:46,412 INFO L225 Difference]: With dead ends: 331 [2025-03-08 00:53:46,412 INFO L226 Difference]: Without dead ends: 212 [2025-03-08 00:53:46,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=2841, Unknown=0, NotChecked=0, Total=3192 [2025-03-08 00:53:46,414 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 268 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:46,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 1426 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 00:53:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2025-03-08 00:53:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 111. [2025-03-08 00:53:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 97 states have (on average 1.3711340206185567) internal successors, (133), 101 states have internal predecessors, (133), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2025-03-08 00:53:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 165 transitions. [2025-03-08 00:53:46,433 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 165 transitions. Word has length 51 [2025-03-08 00:53:46,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:46,433 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 165 transitions. [2025-03-08 00:53:46,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 00:53:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 165 transitions. [2025-03-08 00:53:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-08 00:53:46,434 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:46,434 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:46,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:46,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:46,638 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:46,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:46,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1604242859, now seen corresponding path program 2 times [2025-03-08 00:53:46,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:46,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824184841] [2025-03-08 00:53:46,639 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:53:46,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:46,643 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-08 00:53:46,653 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-08 00:53:46,653 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:53:46,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:46,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:46,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824184841] [2025-03-08 00:53:46,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824184841] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:46,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069079369] [2025-03-08 00:53:46,755 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:53:46,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:46,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:46,757 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) [2025-03-08 00:53:46,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 00:53:46,785 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-08 00:53:46,799 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-08 00:53:46,799 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:53:46,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:46,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 00:53:46,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:53:46,848 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:53:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:46,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069079369] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:53:46,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:53:46,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-03-08 00:53:46,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872446207] [2025-03-08 00:53:46,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:53:46,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 00:53:46,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:46,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 00:53:46,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2025-03-08 00:53:46,970 INFO L87 Difference]: Start difference. First operand 111 states and 165 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 00:53:47,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:47,107 INFO L93 Difference]: Finished difference Result 297 states and 432 transitions. [2025-03-08 00:53:47,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 00:53:47,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 53 [2025-03-08 00:53:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:47,108 INFO L225 Difference]: With dead ends: 297 [2025-03-08 00:53:47,108 INFO L226 Difference]: Without dead ends: 197 [2025-03-08 00:53:47,109 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:53:47,109 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 182 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:47,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 448 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:53:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2025-03-08 00:53:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 123. [2025-03-08 00:53:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 109 states have (on average 1.4403669724770642) internal successors, (157), 113 states have internal predecessors, (157), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2025-03-08 00:53:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 189 transitions. [2025-03-08 00:53:47,119 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 189 transitions. Word has length 53 [2025-03-08 00:53:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:47,119 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 189 transitions. [2025-03-08 00:53:47,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 00:53:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 189 transitions. [2025-03-08 00:53:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-08 00:53:47,120 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:47,120 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:47,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:47,325 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,SelfDestructingSolverStorable11 [2025-03-08 00:53:47,325 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:47,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:47,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1605128127, now seen corresponding path program 1 times [2025-03-08 00:53:47,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:47,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744824100] [2025-03-08 00:53:47,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:47,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:47,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-08 00:53:47,336 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 00:53:47,336 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:47,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-08 00:53:47,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:47,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744824100] [2025-03-08 00:53:47,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744824100] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:47,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325214812] [2025-03-08 00:53:47,436 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:47,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:47,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:47,438 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) [2025-03-08 00:53:47,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 00:53:47,470 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-08 00:53:47,485 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 00:53:47,485 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:47,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:47,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-08 00:53:47,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:53:47,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:53:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:53:47,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325214812] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:53:47,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:53:47,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 15] total 32 [2025-03-08 00:53:47,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131244986] [2025-03-08 00:53:47,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:53:47,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-08 00:53:47,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:47,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-08 00:53:47,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2025-03-08 00:53:47,991 INFO L87 Difference]: Start difference. First operand 123 states and 189 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 27 states have internal predecessors, (90), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 00:53:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:49,573 INFO L93 Difference]: Finished difference Result 527 states and 876 transitions. [2025-03-08 00:53:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-03-08 00:53:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 27 states have internal predecessors, (90), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 54 [2025-03-08 00:53:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:49,577 INFO L225 Difference]: With dead ends: 527 [2025-03-08 00:53:49,577 INFO L226 Difference]: Without dead ends: 395 [2025-03-08 00:53:49,581 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=447, Invalid=4245, Unknown=0, NotChecked=0, Total=4692 [2025-03-08 00:53:49,581 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 607 mSDsluCounter, 2585 mSDsCounter, 0 mSdLazyCounter, 1902 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:49,582 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 2694 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1902 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-08 00:53:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2025-03-08 00:53:49,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 167. [2025-03-08 00:53:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 151 states have (on average 1.403973509933775) internal successors, (212), 154 states have internal predecessors, (212), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (34), 9 states have call predecessors, (34), 8 states have call successors, (34) [2025-03-08 00:53:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 255 transitions. [2025-03-08 00:53:49,621 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 255 transitions. Word has length 54 [2025-03-08 00:53:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:49,621 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 255 transitions. [2025-03-08 00:53:49,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 27 states have internal predecessors, (90), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 00:53:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 255 transitions. [2025-03-08 00:53:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-08 00:53:49,624 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:49,624 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:49,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 00:53:49,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 00:53:49,824 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:49,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:49,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1641010068, now seen corresponding path program 1 times [2025-03-08 00:53:49,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:49,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141898933] [2025-03-08 00:53:49,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:49,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:49,831 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-08 00:53:49,839 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 00:53:49,839 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:49,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-08 00:53:49,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:49,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141898933] [2025-03-08 00:53:49,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141898933] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:49,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:53:49,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 00:53:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101432060] [2025-03-08 00:53:49,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:49,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 00:53:49,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:49,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 00:53:49,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 00:53:49,898 INFO L87 Difference]: Start difference. First operand 167 states and 255 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:53:49,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:49,930 INFO L93 Difference]: Finished difference Result 173 states and 260 transitions. [2025-03-08 00:53:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 00:53:49,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2025-03-08 00:53:49,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:49,931 INFO L225 Difference]: With dead ends: 173 [2025-03-08 00:53:49,932 INFO L226 Difference]: Without dead ends: 159 [2025-03-08 00:53:49,932 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-08 00:53:49,933 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 1 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:49,933 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 413 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:53:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2025-03-08 00:53:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2025-03-08 00:53:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 143 states have (on average 1.4055944055944056) internal successors, (201), 146 states have internal predecessors, (201), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (34), 9 states have call predecessors, (34), 8 states have call successors, (34) [2025-03-08 00:53:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 244 transitions. [2025-03-08 00:53:49,945 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 244 transitions. Word has length 57 [2025-03-08 00:53:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:49,945 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 244 transitions. [2025-03-08 00:53:49,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:53:49,945 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 244 transitions. [2025-03-08 00:53:49,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-08 00:53:49,947 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:49,947 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:49,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-08 00:53:49,947 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:49,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:49,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1951515779, now seen corresponding path program 1 times [2025-03-08 00:53:49,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:49,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105480442] [2025-03-08 00:53:49,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:49,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:49,952 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-08 00:53:49,962 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 00:53:49,962 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:49,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-08 00:53:50,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:50,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105480442] [2025-03-08 00:53:50,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105480442] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:50,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:53:50,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 00:53:50,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468494601] [2025-03-08 00:53:50,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:50,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 00:53:50,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:50,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 00:53:50,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 00:53:50,049 INFO L87 Difference]: Start difference. First operand 159 states and 244 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:53:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:50,102 INFO L93 Difference]: Finished difference Result 190 states and 285 transitions. [2025-03-08 00:53:50,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 00:53:50,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2025-03-08 00:53:50,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:50,104 INFO L225 Difference]: With dead ends: 190 [2025-03-08 00:53:50,104 INFO L226 Difference]: Without dead ends: 176 [2025-03-08 00:53:50,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 00:53:50,104 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 5 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:50,104 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 431 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:53:50,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2025-03-08 00:53:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 165. [2025-03-08 00:53:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 148 states have (on average 1.3986486486486487) internal successors, (207), 151 states have internal predecessors, (207), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (40), 10 states have call predecessors, (40), 8 states have call successors, (40) [2025-03-08 00:53:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 256 transitions. [2025-03-08 00:53:50,118 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 256 transitions. Word has length 58 [2025-03-08 00:53:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:50,118 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 256 transitions. [2025-03-08 00:53:50,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:53:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 256 transitions. [2025-03-08 00:53:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-08 00:53:50,120 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:50,121 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:50,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-08 00:53:50,121 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:50,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:50,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1658112772, now seen corresponding path program 1 times [2025-03-08 00:53:50,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:50,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34386758] [2025-03-08 00:53:50,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:50,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:50,127 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-08 00:53:50,137 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 00:53:50,137 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:50,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-08 00:53:50,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:50,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34386758] [2025-03-08 00:53:50,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34386758] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:50,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933944406] [2025-03-08 00:53:50,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:50,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:50,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:50,213 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) [2025-03-08 00:53:50,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 00:53:50,243 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-08 00:53:50,257 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 00:53:50,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:50,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:50,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 00:53:50,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-08 00:53:50,297 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:53:50,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933944406] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:50,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:53:50,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2025-03-08 00:53:50,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159566861] [2025-03-08 00:53:50,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:50,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 00:53:50,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:50,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 00:53:50,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-03-08 00:53:50,298 INFO L87 Difference]: Start difference. First operand 165 states and 256 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:50,403 INFO L93 Difference]: Finished difference Result 242 states and 371 transitions. [2025-03-08 00:53:50,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 00:53:50,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2025-03-08 00:53:50,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:50,405 INFO L225 Difference]: With dead ends: 242 [2025-03-08 00:53:50,405 INFO L226 Difference]: Without dead ends: 204 [2025-03-08 00:53:50,405 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:53:50,405 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 46 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:50,406 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 734 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:53:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2025-03-08 00:53:50,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2025-03-08 00:53:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 185 states have (on average 1.3891891891891892) internal successors, (257), 186 states have internal predecessors, (257), 11 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (51), 14 states have call predecessors, (51), 10 states have call successors, (51) [2025-03-08 00:53:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 319 transitions. [2025-03-08 00:53:50,418 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 319 transitions. Word has length 58 [2025-03-08 00:53:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:50,419 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 319 transitions. [2025-03-08 00:53:50,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 319 transitions. [2025-03-08 00:53:50,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-08 00:53:50,420 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:50,420 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:50,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:50,627 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 [2025-03-08 00:53:50,627 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:50,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:50,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1318456829, now seen corresponding path program 1 times [2025-03-08 00:53:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:50,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430502705] [2025-03-08 00:53:50,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:50,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:50,632 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-08 00:53:50,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-08 00:53:50,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:50,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 00:53:50,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430502705] [2025-03-08 00:53:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430502705] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634707804] [2025-03-08 00:53:50,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:50,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:50,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:50,736 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) [2025-03-08 00:53:50,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 00:53:50,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-08 00:53:50,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-08 00:53:50,792 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:50,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:50,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 00:53:50,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 00:53:50,842 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:53:50,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634707804] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:50,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:53:50,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2025-03-08 00:53:50,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522321939] [2025-03-08 00:53:50,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:50,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 00:53:50,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:50,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 00:53:50,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2025-03-08 00:53:50,843 INFO L87 Difference]: Start difference. First operand 204 states and 319 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:53:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:50,907 INFO L93 Difference]: Finished difference Result 301 states and 449 transitions. [2025-03-08 00:53:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 00:53:50,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2025-03-08 00:53:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:50,908 INFO L225 Difference]: With dead ends: 301 [2025-03-08 00:53:50,909 INFO L226 Difference]: Without dead ends: 228 [2025-03-08 00:53:50,909 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2025-03-08 00:53:50,909 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 5 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:50,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 523 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:53:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2025-03-08 00:53:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 222. [2025-03-08 00:53:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 203 states have (on average 1.374384236453202) internal successors, (279), 203 states have internal predecessors, (279), 11 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (51), 15 states have call predecessors, (51), 10 states have call successors, (51) [2025-03-08 00:53:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 341 transitions. [2025-03-08 00:53:50,922 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 341 transitions. Word has length 62 [2025-03-08 00:53:50,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:50,923 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 341 transitions. [2025-03-08 00:53:50,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:53:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 341 transitions. [2025-03-08 00:53:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-08 00:53:50,924 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:50,924 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:50,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:51,124 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 [2025-03-08 00:53:51,125 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:51,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:51,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1727281054, now seen corresponding path program 1 times [2025-03-08 00:53:51,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:51,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085771215] [2025-03-08 00:53:51,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:51,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:51,130 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-08 00:53:51,140 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-08 00:53:51,140 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:51,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 00:53:51,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:51,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085771215] [2025-03-08 00:53:51,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085771215] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:51,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306421084] [2025-03-08 00:53:51,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:51,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:51,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:51,232 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) [2025-03-08 00:53:51,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 00:53:51,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-08 00:53:51,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-08 00:53:51,288 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:51,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:51,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-08 00:53:51,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-08 00:53:51,841 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:53:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-08 00:53:52,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306421084] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:53:52,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:53:52,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 12] total 27 [2025-03-08 00:53:52,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724827324] [2025-03-08 00:53:52,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:53:52,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 00:53:52,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:52,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 00:53:52,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2025-03-08 00:53:52,094 INFO L87 Difference]: Start difference. First operand 222 states and 341 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 22 states have internal predecessors, (87), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 00:53:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:52,767 INFO L93 Difference]: Finished difference Result 476 states and 770 transitions. [2025-03-08 00:53:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 00:53:52,768 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 22 states have internal predecessors, (87), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2025-03-08 00:53:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:52,770 INFO L225 Difference]: With dead ends: 476 [2025-03-08 00:53:52,770 INFO L226 Difference]: Without dead ends: 338 [2025-03-08 00:53:52,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 00:53:52,771 INFO L435 NwaCegarLoop]: 145 mSDtfsCounter, 298 mSDsluCounter, 2884 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 3029 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:52,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 3029 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:53:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2025-03-08 00:53:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 246. [2025-03-08 00:53:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 217 states have (on average 1.3410138248847927) internal successors, (291), 219 states have internal predecessors, (291), 19 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (126), 23 states have call predecessors, (126), 18 states have call successors, (126) [2025-03-08 00:53:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 436 transitions. [2025-03-08 00:53:52,786 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 436 transitions. Word has length 62 [2025-03-08 00:53:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:52,787 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 436 transitions. [2025-03-08 00:53:52,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 22 states have internal predecessors, (87), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 00:53:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 436 transitions. [2025-03-08 00:53:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-03-08 00:53:52,789 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:52,789 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:52,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 00:53:52,989 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 [2025-03-08 00:53:52,990 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:52,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:52,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1948370040, now seen corresponding path program 1 times [2025-03-08 00:53:52,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:52,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979622058] [2025-03-08 00:53:52,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:52,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:52,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-08 00:53:52,998 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-08 00:53:52,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:52,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 00:53:53,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:53,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979622058] [2025-03-08 00:53:53,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979622058] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:53,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:53:53,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 00:53:53,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960801044] [2025-03-08 00:53:53,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:53,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:53:53,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:53,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:53:53,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:53:53,051 INFO L87 Difference]: Start difference. First operand 246 states and 436 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:53:53,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:53,103 INFO L93 Difference]: Finished difference Result 451 states and 757 transitions. [2025-03-08 00:53:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 00:53:53,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2025-03-08 00:53:53,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:53,105 INFO L225 Difference]: With dead ends: 451 [2025-03-08 00:53:53,105 INFO L226 Difference]: Without dead ends: 252 [2025-03-08 00:53:53,106 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:53:53,106 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 9 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:53,106 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 235 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:53:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2025-03-08 00:53:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 244. [2025-03-08 00:53:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 215 states have (on average 1.3348837209302327) internal successors, (287), 217 states have internal predecessors, (287), 19 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (126), 23 states have call predecessors, (126), 18 states have call successors, (126) [2025-03-08 00:53:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 432 transitions. [2025-03-08 00:53:53,121 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 432 transitions. Word has length 63 [2025-03-08 00:53:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:53,121 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 432 transitions. [2025-03-08 00:53:53,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:53:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 432 transitions. [2025-03-08 00:53:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-03-08 00:53:53,124 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:53,124 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:53,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-08 00:53:53,124 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:53,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:53,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2103386065, now seen corresponding path program 1 times [2025-03-08 00:53:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:53,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082355540] [2025-03-08 00:53:53,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:53,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:53,130 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-08 00:53:53,136 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-08 00:53:53,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:53,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 00:53:53,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:53,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082355540] [2025-03-08 00:53:53,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082355540] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:53,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328294729] [2025-03-08 00:53:53,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:53,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:53,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:53,187 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) [2025-03-08 00:53:53,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 00:53:53,219 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-08 00:53:53,246 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-08 00:53:53,246 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:53,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:53,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 00:53:53,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 00:53:53,364 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:53:53,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328294729] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:53:53,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:53:53,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2025-03-08 00:53:53,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71244177] [2025-03-08 00:53:53,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:53:53,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 00:53:53,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:53,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 00:53:53,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:53:53,366 INFO L87 Difference]: Start difference. First operand 244 states and 432 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:53,480 INFO L93 Difference]: Finished difference Result 494 states and 858 transitions. [2025-03-08 00:53:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 00:53:53,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2025-03-08 00:53:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:53,482 INFO L225 Difference]: With dead ends: 494 [2025-03-08 00:53:53,483 INFO L226 Difference]: Without dead ends: 273 [2025-03-08 00:53:53,484 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:53:53,484 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 24 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:53,485 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 371 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:53:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2025-03-08 00:53:53,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 244. [2025-03-08 00:53:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 215 states have (on average 1.3348837209302327) internal successors, (287), 217 states have internal predecessors, (287), 19 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (126), 23 states have call predecessors, (126), 18 states have call successors, (126) [2025-03-08 00:53:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 432 transitions. [2025-03-08 00:53:53,502 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 432 transitions. Word has length 63 [2025-03-08 00:53:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:53,502 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 432 transitions. [2025-03-08 00:53:53,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:53:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 432 transitions. [2025-03-08 00:53:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-08 00:53:53,504 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:53,504 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:53,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:53,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:53,708 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:53,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:53,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1714697096, now seen corresponding path program 1 times [2025-03-08 00:53:53,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:53,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909670331] [2025-03-08 00:53:53,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:53,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:53,712 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-08 00:53:53,721 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-08 00:53:53,722 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:53,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:53,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:53,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909670331] [2025-03-08 00:53:53,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909670331] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:53,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529066115] [2025-03-08 00:53:53,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:53,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:53,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:53,906 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) [2025-03-08 00:53:53,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 00:53:53,942 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-08 00:53:54,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-08 00:53:54,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:54,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:54,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-08 00:53:54,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:53:54,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:53:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:53:54,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529066115] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:53:54,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:53:54,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 19] total 44 [2025-03-08 00:53:54,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558945810] [2025-03-08 00:53:54,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:53:54,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-08 00:53:54,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:54,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-08 00:53:54,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2025-03-08 00:53:54,916 INFO L87 Difference]: Start difference. First operand 244 states and 432 transitions. Second operand has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 40 states have internal predecessors, (118), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 00:53:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:58,993 INFO L93 Difference]: Finished difference Result 906 states and 1744 transitions. [2025-03-08 00:53:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2025-03-08 00:53:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 40 states have internal predecessors, (118), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2025-03-08 00:53:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:58,997 INFO L225 Difference]: With dead ends: 906 [2025-03-08 00:53:58,997 INFO L226 Difference]: Without dead ends: 582 [2025-03-08 00:53:59,002 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4145 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2136, Invalid=13614, Unknown=0, NotChecked=0, Total=15750 [2025-03-08 00:53:59,002 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 1120 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 3604 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 2020 SdHoareTripleChecker+Invalid, 4030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 3604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:59,002 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 2020 Invalid, 4030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 3604 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-08 00:53:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2025-03-08 00:53:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 251. [2025-03-08 00:53:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 222 states have (on average 1.3558558558558558) internal successors, (301), 224 states have internal predecessors, (301), 19 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (126), 23 states have call predecessors, (126), 18 states have call successors, (126) [2025-03-08 00:53:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 446 transitions. [2025-03-08 00:53:59,026 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 446 transitions. Word has length 65 [2025-03-08 00:53:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:59,026 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 446 transitions. [2025-03-08 00:53:59,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 40 states have internal predecessors, (118), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 00:53:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 446 transitions. [2025-03-08 00:53:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-08 00:53:59,027 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:59,027 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:53:59,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 00:53:59,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:59,228 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:53:59,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:53:59,228 INFO L85 PathProgramCache]: Analyzing trace with hash -827215272, now seen corresponding path program 1 times [2025-03-08 00:53:59,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:53:59,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077077732] [2025-03-08 00:53:59,228 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:59,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:53:59,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-03-08 00:53:59,236 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-03-08 00:53:59,236 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:59,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:59,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:53:59,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077077732] [2025-03-08 00:53:59,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077077732] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:53:59,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122792737] [2025-03-08 00:53:59,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:53:59,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:53:59,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:53:59,406 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) [2025-03-08 00:53:59,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 00:53:59,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-03-08 00:53:59,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-03-08 00:53:59,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:53:59,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:53:59,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 00:53:59,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:53:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:53:59,543 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:53:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:53:59,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122792737] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:53:59,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:53:59,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2025-03-08 00:53:59,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349316607] [2025-03-08 00:53:59,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:53:59,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-08 00:53:59,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:53:59,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-08 00:53:59,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 00:53:59,791 INFO L87 Difference]: Start difference. First operand 251 states and 446 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 00:53:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:53:59,971 INFO L93 Difference]: Finished difference Result 627 states and 1025 transitions. [2025-03-08 00:53:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 00:53:59,971 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2025-03-08 00:53:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:53:59,974 INFO L225 Difference]: With dead ends: 627 [2025-03-08 00:53:59,974 INFO L226 Difference]: Without dead ends: 431 [2025-03-08 00:53:59,976 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=525, Invalid=957, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 00:53:59,978 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 679 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:53:59,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 598 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:53:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2025-03-08 00:53:59,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 268. [2025-03-08 00:53:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 239 states have (on average 1.401673640167364) internal successors, (335), 241 states have internal predecessors, (335), 19 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (126), 23 states have call predecessors, (126), 18 states have call successors, (126) [2025-03-08 00:53:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 480 transitions. [2025-03-08 00:53:59,997 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 480 transitions. Word has length 68 [2025-03-08 00:53:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:53:59,997 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 480 transitions. [2025-03-08 00:53:59,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 00:53:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 480 transitions. [2025-03-08 00:53:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-08 00:53:59,999 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:53:59,999 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:00,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 00:54:00,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:00,200 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:00,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash 549116043, now seen corresponding path program 1 times [2025-03-08 00:54:00,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:00,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600898896] [2025-03-08 00:54:00,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:00,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:00,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-03-08 00:54:00,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-03-08 00:54:00,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:00,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 00:54:00,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:00,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600898896] [2025-03-08 00:54:00,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600898896] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:00,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684804775] [2025-03-08 00:54:00,407 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:00,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:00,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:00,408 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) [2025-03-08 00:54:00,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 00:54:00,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-03-08 00:54:00,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-03-08 00:54:00,453 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:00,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:00,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-08 00:54:00,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 00:54:00,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:54:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 00:54:01,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684804775] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:54:01,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:54:01,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 18] total 43 [2025-03-08 00:54:01,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866709865] [2025-03-08 00:54:01,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:54:01,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-08 00:54:01,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:01,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-08 00:54:01,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2025-03-08 00:54:01,142 INFO L87 Difference]: Start difference. First operand 268 states and 480 transitions. Second operand has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 41 states have internal predecessors, (125), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 00:54:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:06,291 INFO L93 Difference]: Finished difference Result 887 states and 1751 transitions. [2025-03-08 00:54:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2025-03-08 00:54:06,291 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 41 states have internal predecessors, (125), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 75 [2025-03-08 00:54:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:06,295 INFO L225 Difference]: With dead ends: 887 [2025-03-08 00:54:06,295 INFO L226 Difference]: Without dead ends: 634 [2025-03-08 00:54:06,300 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4832 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2517, Invalid=14775, Unknown=0, NotChecked=0, Total=17292 [2025-03-08 00:54:06,300 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 1358 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 3439 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1358 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 3901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 3439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:06,300 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1358 Valid, 1575 Invalid, 3901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 3439 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-03-08 00:54:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2025-03-08 00:54:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 300. [2025-03-08 00:54:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 263 states have (on average 1.3802281368821292) internal successors, (363), 265 states have internal predecessors, (363), 25 states have call successors, (25), 3 states have call predecessors, (25), 11 states have return successors, (224), 31 states have call predecessors, (224), 24 states have call successors, (224) [2025-03-08 00:54:06,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 612 transitions. [2025-03-08 00:54:06,332 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 612 transitions. Word has length 75 [2025-03-08 00:54:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:06,332 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 612 transitions. [2025-03-08 00:54:06,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 41 states have internal predecessors, (125), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 00:54:06,332 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 612 transitions. [2025-03-08 00:54:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-03-08 00:54:06,334 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:06,334 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:06,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 00:54:06,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:06,535 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:06,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:06,535 INFO L85 PathProgramCache]: Analyzing trace with hash 417858052, now seen corresponding path program 1 times [2025-03-08 00:54:06,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:06,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177753430] [2025-03-08 00:54:06,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:06,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:06,541 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-03-08 00:54:06,548 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-03-08 00:54:06,548 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:06,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2025-03-08 00:54:06,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:06,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177753430] [2025-03-08 00:54:06,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177753430] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:06,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117773702] [2025-03-08 00:54:06,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:06,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:06,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:06,641 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) [2025-03-08 00:54:06,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 00:54:06,678 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-03-08 00:54:06,696 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-03-08 00:54:06,697 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:06,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:06,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 00:54:06,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2025-03-08 00:54:06,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:54:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-03-08 00:54:06,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117773702] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:06,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 00:54:06,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 13 [2025-03-08 00:54:06,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673768150] [2025-03-08 00:54:06,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:54:06,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 00:54:06,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:06,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 00:54:06,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2025-03-08 00:54:06,777 INFO L87 Difference]: Start difference. First operand 300 states and 612 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:54:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:06,823 INFO L93 Difference]: Finished difference Result 326 states and 640 transitions. [2025-03-08 00:54:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 00:54:06,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 77 [2025-03-08 00:54:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:06,825 INFO L225 Difference]: With dead ends: 326 [2025-03-08 00:54:06,825 INFO L226 Difference]: Without dead ends: 314 [2025-03-08 00:54:06,825 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2025-03-08 00:54:06,826 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 10 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:06,826 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 230 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:54:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2025-03-08 00:54:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 301. [2025-03-08 00:54:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 264 states have (on average 1.3825757575757576) internal successors, (365), 266 states have internal predecessors, (365), 25 states have call successors, (25), 3 states have call predecessors, (25), 11 states have return successors, (224), 31 states have call predecessors, (224), 24 states have call successors, (224) [2025-03-08 00:54:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 614 transitions. [2025-03-08 00:54:06,845 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 614 transitions. Word has length 77 [2025-03-08 00:54:06,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:06,845 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 614 transitions. [2025-03-08 00:54:06,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:54:06,845 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 614 transitions. [2025-03-08 00:54:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-08 00:54:06,847 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:06,847 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:06,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-08 00:54:07,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:07,048 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:07,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:07,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1479445454, now seen corresponding path program 1 times [2025-03-08 00:54:07,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:07,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863922292] [2025-03-08 00:54:07,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:07,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:07,052 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-08 00:54:07,058 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-08 00:54:07,058 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:07,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:54:07,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:07,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863922292] [2025-03-08 00:54:07,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863922292] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:07,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185387271] [2025-03-08 00:54:07,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:07,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:07,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:07,212 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) [2025-03-08 00:54:07,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 00:54:07,249 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-08 00:54:07,268 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-08 00:54:07,269 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:07,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:07,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 00:54:07,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 25 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:54:07,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:54:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:54:07,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185387271] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:54:07,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:54:07,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2025-03-08 00:54:07,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830743499] [2025-03-08 00:54:07,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:54:07,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-08 00:54:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:07,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-08 00:54:07,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2025-03-08 00:54:07,637 INFO L87 Difference]: Start difference. First operand 301 states and 614 transitions. Second operand has 31 states, 31 states have (on average 4.0) internal successors, (124), 31 states have internal predecessors, (124), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-08 00:54:08,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:08,357 INFO L93 Difference]: Finished difference Result 704 states and 1316 transitions. [2025-03-08 00:54:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 00:54:08,357 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.0) internal successors, (124), 31 states have internal predecessors, (124), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2025-03-08 00:54:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:08,369 INFO L225 Difference]: With dead ends: 704 [2025-03-08 00:54:08,369 INFO L226 Difference]: Without dead ends: 432 [2025-03-08 00:54:08,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=529, Invalid=953, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 00:54:08,371 INFO L435 NwaCegarLoop]: 117 mSDtfsCounter, 393 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:08,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1296 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:54:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2025-03-08 00:54:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 295. [2025-03-08 00:54:08,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 262 states have (on average 1.3854961832061068) internal successors, (363), 263 states have internal predecessors, (363), 22 states have call successors, (22), 3 states have call predecessors, (22), 10 states have return successors, (171), 28 states have call predecessors, (171), 21 states have call successors, (171) [2025-03-08 00:54:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 556 transitions. [2025-03-08 00:54:08,396 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 556 transitions. Word has length 79 [2025-03-08 00:54:08,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:08,396 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 556 transitions. [2025-03-08 00:54:08,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.0) internal successors, (124), 31 states have internal predecessors, (124), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-08 00:54:08,396 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 556 transitions. [2025-03-08 00:54:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-03-08 00:54:08,399 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:08,399 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:08,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-08 00:54:08,599 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,SelfDestructingSolverStorable24 [2025-03-08 00:54:08,599 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:08,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash -564727361, now seen corresponding path program 1 times [2025-03-08 00:54:08,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:08,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656810329] [2025-03-08 00:54:08,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:08,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:08,604 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-03-08 00:54:08,615 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-03-08 00:54:08,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:08,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-03-08 00:54:08,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:08,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656810329] [2025-03-08 00:54:08,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656810329] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:08,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964982535] [2025-03-08 00:54:08,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:08,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:08,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:08,707 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) [2025-03-08 00:54:08,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 00:54:08,740 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-03-08 00:54:08,760 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-03-08 00:54:08,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:08,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:08,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 00:54:08,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-03-08 00:54:08,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:54:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-03-08 00:54:08,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964982535] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:54:08,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:54:08,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2025-03-08 00:54:08,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48092748] [2025-03-08 00:54:08,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:54:08,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 00:54:08,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:08,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 00:54:08,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2025-03-08 00:54:08,852 INFO L87 Difference]: Start difference. First operand 295 states and 556 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-08 00:54:08,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:08,940 INFO L93 Difference]: Finished difference Result 309 states and 569 transitions. [2025-03-08 00:54:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 00:54:08,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 80 [2025-03-08 00:54:08,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:08,942 INFO L225 Difference]: With dead ends: 309 [2025-03-08 00:54:08,942 INFO L226 Difference]: Without dead ends: 254 [2025-03-08 00:54:08,943 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-03-08 00:54:08,943 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:08,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 784 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:54:08,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2025-03-08 00:54:08,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2025-03-08 00:54:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 225 states have (on average 1.4) internal successors, (315), 228 states have internal predecessors, (315), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (124), 22 states have call predecessors, (124), 17 states have call successors, (124) [2025-03-08 00:54:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 457 transitions. [2025-03-08 00:54:08,964 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 457 transitions. Word has length 80 [2025-03-08 00:54:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:08,964 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 457 transitions. [2025-03-08 00:54:08,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-08 00:54:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 457 transitions. [2025-03-08 00:54:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-03-08 00:54:08,967 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:08,967 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:08,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-08 00:54:09,167 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,SelfDestructingSolverStorable25 [2025-03-08 00:54:09,168 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:09,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:09,168 INFO L85 PathProgramCache]: Analyzing trace with hash -700483169, now seen corresponding path program 1 times [2025-03-08 00:54:09,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:09,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111731497] [2025-03-08 00:54:09,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:09,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:09,172 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-03-08 00:54:09,181 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-03-08 00:54:09,181 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:09,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-03-08 00:54:09,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:09,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111731497] [2025-03-08 00:54:09,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111731497] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:54:09,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:54:09,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 00:54:09,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210289515] [2025-03-08 00:54:09,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:54:09,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 00:54:09,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:09,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 00:54:09,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:54:09,233 INFO L87 Difference]: Start difference. First operand 254 states and 457 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:54:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:09,274 INFO L93 Difference]: Finished difference Result 274 states and 477 transitions. [2025-03-08 00:54:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 00:54:09,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 81 [2025-03-08 00:54:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:09,276 INFO L225 Difference]: With dead ends: 274 [2025-03-08 00:54:09,276 INFO L226 Difference]: Without dead ends: 262 [2025-03-08 00:54:09,276 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:54:09,276 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 1 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:09,276 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 331 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:54:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2025-03-08 00:54:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 254. [2025-03-08 00:54:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 225 states have (on average 1.3866666666666667) internal successors, (312), 228 states have internal predecessors, (312), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (124), 22 states have call predecessors, (124), 17 states have call successors, (124) [2025-03-08 00:54:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 454 transitions. [2025-03-08 00:54:09,292 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 454 transitions. Word has length 81 [2025-03-08 00:54:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:09,293 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 454 transitions. [2025-03-08 00:54:09,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:54:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 454 transitions. [2025-03-08 00:54:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-03-08 00:54:09,294 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:09,294 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:09,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2025-03-08 00:54:09,294 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:09,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash -73097280, now seen corresponding path program 1 times [2025-03-08 00:54:09,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:09,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388071901] [2025-03-08 00:54:09,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:09,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:09,298 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-03-08 00:54:09,315 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-03-08 00:54:09,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:09,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 00:54:09,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:09,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388071901] [2025-03-08 00:54:09,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388071901] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:09,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141620814] [2025-03-08 00:54:09,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:09,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:09,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:09,506 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) [2025-03-08 00:54:09,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 00:54:09,545 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-03-08 00:54:09,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-03-08 00:54:09,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:09,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:09,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 00:54:09,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-03-08 00:54:09,628 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:54:09,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141620814] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:54:09,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:54:09,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2025-03-08 00:54:09,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017687757] [2025-03-08 00:54:09,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:54:09,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 00:54:09,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:09,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 00:54:09,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:54:09,629 INFO L87 Difference]: Start difference. First operand 254 states and 454 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:54:09,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:09,686 INFO L93 Difference]: Finished difference Result 281 states and 482 transitions. [2025-03-08 00:54:09,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 00:54:09,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 81 [2025-03-08 00:54:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:09,687 INFO L225 Difference]: With dead ends: 281 [2025-03-08 00:54:09,687 INFO L226 Difference]: Without dead ends: 267 [2025-03-08 00:54:09,688 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:54:09,688 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 8 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:09,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 475 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:54:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2025-03-08 00:54:09,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 253. [2025-03-08 00:54:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 224 states have (on average 1.3839285714285714) internal successors, (310), 227 states have internal predecessors, (310), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (124), 22 states have call predecessors, (124), 17 states have call successors, (124) [2025-03-08 00:54:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 452 transitions. [2025-03-08 00:54:09,704 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 452 transitions. Word has length 81 [2025-03-08 00:54:09,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:09,704 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 452 transitions. [2025-03-08 00:54:09,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:54:09,704 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 452 transitions. [2025-03-08 00:54:09,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-08 00:54:09,706 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:09,706 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:09,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-08 00:54:09,906 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,SelfDestructingSolverStorable27 [2025-03-08 00:54:09,906 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:09,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash -600150294, now seen corresponding path program 1 times [2025-03-08 00:54:09,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:09,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739053107] [2025-03-08 00:54:09,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:09,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:09,911 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 82 statements into 1 equivalence classes. [2025-03-08 00:54:09,926 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 82 of 82 statements. [2025-03-08 00:54:09,926 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:09,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 00:54:10,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739053107] [2025-03-08 00:54:10,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739053107] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815361022] [2025-03-08 00:54:10,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:10,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:10,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:10,129 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) [2025-03-08 00:54:10,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 00:54:10,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 82 statements into 1 equivalence classes. [2025-03-08 00:54:10,318 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 82 of 82 statements. [2025-03-08 00:54:10,319 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:10,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:10,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 00:54:10,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2025-03-08 00:54:10,400 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:54:10,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815361022] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:54:10,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:54:10,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2025-03-08 00:54:10,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858402068] [2025-03-08 00:54:10,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:54:10,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 00:54:10,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:10,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 00:54:10,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2025-03-08 00:54:10,401 INFO L87 Difference]: Start difference. First operand 253 states and 452 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:54:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:10,498 INFO L93 Difference]: Finished difference Result 284 states and 488 transitions. [2025-03-08 00:54:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 00:54:10,499 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 82 [2025-03-08 00:54:10,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:10,500 INFO L225 Difference]: With dead ends: 284 [2025-03-08 00:54:10,500 INFO L226 Difference]: Without dead ends: 253 [2025-03-08 00:54:10,500 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2025-03-08 00:54:10,501 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 43 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:10,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 587 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:54:10,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2025-03-08 00:54:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2025-03-08 00:54:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 224 states have (on average 1.3794642857142858) internal successors, (309), 227 states have internal predecessors, (309), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (124), 22 states have call predecessors, (124), 17 states have call successors, (124) [2025-03-08 00:54:10,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 451 transitions. [2025-03-08 00:54:10,517 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 451 transitions. Word has length 82 [2025-03-08 00:54:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:10,517 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 451 transitions. [2025-03-08 00:54:10,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 00:54:10,517 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 451 transitions. [2025-03-08 00:54:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-08 00:54:10,518 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:10,519 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:10,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-08 00:54:10,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:10,719 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:10,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:10,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2052279914, now seen corresponding path program 1 times [2025-03-08 00:54:10,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:10,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112110439] [2025-03-08 00:54:10,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:10,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:10,724 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-03-08 00:54:10,740 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-03-08 00:54:10,740 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:10,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 00:54:10,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:10,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112110439] [2025-03-08 00:54:10,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112110439] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:10,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490449594] [2025-03-08 00:54:10,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:10,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:10,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:10,950 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) [2025-03-08 00:54:10,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 00:54:10,992 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-03-08 00:54:11,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-03-08 00:54:11,248 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:11,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:11,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 00:54:11,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2025-03-08 00:54:11,314 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:54:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2025-03-08 00:54:11,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490449594] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:54:11,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:54:11,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 25 [2025-03-08 00:54:11,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591894352] [2025-03-08 00:54:11,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:54:11,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 00:54:11,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:11,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 00:54:11,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2025-03-08 00:54:11,412 INFO L87 Difference]: Start difference. First operand 253 states and 451 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 23 states have internal predecessors, (87), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-08 00:54:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:11,952 INFO L93 Difference]: Finished difference Result 531 states and 940 transitions. [2025-03-08 00:54:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 00:54:11,952 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 23 states have internal predecessors, (87), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 83 [2025-03-08 00:54:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:11,954 INFO L225 Difference]: With dead ends: 531 [2025-03-08 00:54:11,954 INFO L226 Difference]: Without dead ends: 309 [2025-03-08 00:54:11,955 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 00:54:11,957 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 223 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:11,957 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 1240 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:54:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2025-03-08 00:54:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 253. [2025-03-08 00:54:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 224 states have (on average 1.3660714285714286) internal successors, (306), 227 states have internal predecessors, (306), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (124), 22 states have call predecessors, (124), 17 states have call successors, (124) [2025-03-08 00:54:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 448 transitions. [2025-03-08 00:54:11,977 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 448 transitions. Word has length 83 [2025-03-08 00:54:11,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:11,978 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 448 transitions. [2025-03-08 00:54:11,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 23 states have internal predecessors, (87), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-08 00:54:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 448 transitions. [2025-03-08 00:54:11,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-03-08 00:54:11,979 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:11,979 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:11,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-08 00:54:12,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:12,180 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:12,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:12,180 INFO L85 PathProgramCache]: Analyzing trace with hash 908436428, now seen corresponding path program 2 times [2025-03-08 00:54:12,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:12,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406501973] [2025-03-08 00:54:12,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:54:12,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:12,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 85 statements into 2 equivalence classes. [2025-03-08 00:54:12,207 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 85 of 85 statements. [2025-03-08 00:54:12,208 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:54:12,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 249 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:54:12,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:12,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406501973] [2025-03-08 00:54:12,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406501973] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:12,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816177494] [2025-03-08 00:54:12,583 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:54:12,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:12,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:12,585 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) [2025-03-08 00:54:12,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-08 00:54:12,620 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 85 statements into 2 equivalence classes. [2025-03-08 00:54:12,641 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 85 of 85 statements. [2025-03-08 00:54:12,641 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:54:12,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:12,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-08 00:54:12,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 10 proven. 249 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:54:13,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:54:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 249 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:54:14,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816177494] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:54:14,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:54:14,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29, 28] total 73 [2025-03-08 00:54:14,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330554867] [2025-03-08 00:54:14,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:54:14,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-03-08 00:54:14,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:14,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-03-08 00:54:14,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4782, Unknown=0, NotChecked=0, Total=5256 [2025-03-08 00:54:14,528 INFO L87 Difference]: Start difference. First operand 253 states and 448 transitions. Second operand has 73 states, 73 states have (on average 2.3972602739726026) internal successors, (175), 69 states have internal predecessors, (175), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 00:54:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:27,885 INFO L93 Difference]: Finished difference Result 1062 states and 1838 transitions. [2025-03-08 00:54:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2025-03-08 00:54:27,886 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.3972602739726026) internal successors, (175), 69 states have internal predecessors, (175), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 85 [2025-03-08 00:54:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:27,890 INFO L225 Difference]: With dead ends: 1062 [2025-03-08 00:54:27,890 INFO L226 Difference]: Without dead ends: 814 [2025-03-08 00:54:27,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11559 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=7095, Invalid=36795, Unknown=0, NotChecked=0, Total=43890 [2025-03-08 00:54:27,895 INFO L435 NwaCegarLoop]: 123 mSDtfsCounter, 4619 mSDsluCounter, 4477 mSDsCounter, 0 mSdLazyCounter, 8766 mSolverCounterSat, 1534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4643 SdHoareTripleChecker+Valid, 4600 SdHoareTripleChecker+Invalid, 10300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1534 IncrementalHoareTripleChecker+Valid, 8766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:27,895 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4643 Valid, 4600 Invalid, 10300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1534 Valid, 8766 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2025-03-08 00:54:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2025-03-08 00:54:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 272. [2025-03-08 00:54:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 243 states have (on average 1.4320987654320987) internal successors, (348), 246 states have internal predecessors, (348), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (132), 22 states have call predecessors, (132), 17 states have call successors, (132) [2025-03-08 00:54:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 498 transitions. [2025-03-08 00:54:27,930 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 498 transitions. Word has length 85 [2025-03-08 00:54:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:27,930 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 498 transitions. [2025-03-08 00:54:27,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.3972602739726026) internal successors, (175), 69 states have internal predecessors, (175), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 00:54:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 498 transitions. [2025-03-08 00:54:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-08 00:54:27,932 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:27,932 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:27,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-03-08 00:54:28,136 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,SelfDestructingSolverStorable30 [2025-03-08 00:54:28,136 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:28,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash 361946784, now seen corresponding path program 2 times [2025-03-08 00:54:28,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:28,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145130592] [2025-03-08 00:54:28,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:54:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:28,140 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 92 statements into 2 equivalence classes. [2025-03-08 00:54:28,146 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 92 of 92 statements. [2025-03-08 00:54:28,146 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:54:28,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 4 proven. 493 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:54:28,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:28,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145130592] [2025-03-08 00:54:28,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145130592] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:28,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525451173] [2025-03-08 00:54:28,503 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:54:28,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:28,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:28,505 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) [2025-03-08 00:54:28,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-08 00:54:28,537 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 92 statements into 2 equivalence classes. [2025-03-08 00:54:28,557 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 92 of 92 statements. [2025-03-08 00:54:28,557 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:54:28,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:28,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 00:54:28,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 25 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:54:28,829 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:54:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 4 proven. 493 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:54:29,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525451173] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:54:29,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:54:29,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2025-03-08 00:54:29,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967339406] [2025-03-08 00:54:29,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:54:29,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2025-03-08 00:54:29,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:29,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2025-03-08 00:54:29,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=3556, Unknown=0, NotChecked=0, Total=5402 [2025-03-08 00:54:29,549 INFO L87 Difference]: Start difference. First operand 272 states and 498 transitions. Second operand has 74 states, 74 states have (on average 2.4864864864864864) internal successors, (184), 74 states have internal predecessors, (184), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 00:54:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:29,931 INFO L93 Difference]: Finished difference Result 842 states and 1339 transitions. [2025-03-08 00:54:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-08 00:54:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.4864864864864864) internal successors, (184), 74 states have internal predecessors, (184), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 92 [2025-03-08 00:54:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:29,934 INFO L225 Difference]: With dead ends: 842 [2025-03-08 00:54:29,934 INFO L226 Difference]: Without dead ends: 622 [2025-03-08 00:54:29,935 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1917, Invalid=3633, Unknown=0, NotChecked=0, Total=5550 [2025-03-08 00:54:29,935 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 1520 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:29,935 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 793 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:54:29,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2025-03-08 00:54:29,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 297. [2025-03-08 00:54:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 268 states have (on average 1.4850746268656716) internal successors, (398), 271 states have internal predecessors, (398), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (132), 22 states have call predecessors, (132), 17 states have call successors, (132) [2025-03-08 00:54:29,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 548 transitions. [2025-03-08 00:54:29,964 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 548 transitions. Word has length 92 [2025-03-08 00:54:29,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:29,965 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 548 transitions. [2025-03-08 00:54:29,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.4864864864864864) internal successors, (184), 74 states have internal predecessors, (184), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 00:54:29,965 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 548 transitions. [2025-03-08 00:54:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-08 00:54:29,966 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:29,966 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:29,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-08 00:54:30,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-03-08 00:54:30,166 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:30,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:30,167 INFO L85 PathProgramCache]: Analyzing trace with hash -507275751, now seen corresponding path program 1 times [2025-03-08 00:54:30,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:30,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184049570] [2025-03-08 00:54:30,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:30,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:30,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 95 statements into 1 equivalence classes. [2025-03-08 00:54:30,176 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 95 of 95 statements. [2025-03-08 00:54:30,176 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:30,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2025-03-08 00:54:30,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:30,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184049570] [2025-03-08 00:54:30,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184049570] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:54:30,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:54:30,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 00:54:30,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756656869] [2025-03-08 00:54:30,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:54:30,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 00:54:30,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:30,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 00:54:30,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 00:54:30,259 INFO L87 Difference]: Start difference. First operand 297 states and 548 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:54:30,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:30,315 INFO L93 Difference]: Finished difference Result 382 states and 655 transitions. [2025-03-08 00:54:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 00:54:30,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 95 [2025-03-08 00:54:30,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:30,317 INFO L225 Difference]: With dead ends: 382 [2025-03-08 00:54:30,317 INFO L226 Difference]: Without dead ends: 303 [2025-03-08 00:54:30,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 00:54:30,318 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:30,318 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 395 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:54:30,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2025-03-08 00:54:30,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 293. [2025-03-08 00:54:30,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 268 states have (on average 1.4850746268656716) internal successors, (398), 268 states have internal predecessors, (398), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 21 states have call predecessors, (86), 14 states have call successors, (86) [2025-03-08 00:54:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 499 transitions. [2025-03-08 00:54:30,343 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 499 transitions. Word has length 95 [2025-03-08 00:54:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:30,343 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 499 transitions. [2025-03-08 00:54:30,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:54:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 499 transitions. [2025-03-08 00:54:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-08 00:54:30,344 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:30,344 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:30,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2025-03-08 00:54:30,344 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:30,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:30,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1264816242, now seen corresponding path program 1 times [2025-03-08 00:54:30,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:30,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288688244] [2025-03-08 00:54:30,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:30,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:30,349 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 102 statements into 1 equivalence classes. [2025-03-08 00:54:30,360 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 102 of 102 statements. [2025-03-08 00:54:30,361 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:30,361 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2025-03-08 00:54:30,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:30,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288688244] [2025-03-08 00:54:30,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288688244] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:54:30,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:54:30,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 00:54:30,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049654742] [2025-03-08 00:54:30,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:54:30,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 00:54:30,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:30,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 00:54:30,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 00:54:30,584 INFO L87 Difference]: Start difference. First operand 293 states and 499 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:54:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:30,706 INFO L93 Difference]: Finished difference Result 348 states and 569 transitions. [2025-03-08 00:54:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 00:54:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 102 [2025-03-08 00:54:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:30,708 INFO L225 Difference]: With dead ends: 348 [2025-03-08 00:54:30,708 INFO L226 Difference]: Without dead ends: 327 [2025-03-08 00:54:30,709 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-08 00:54:30,709 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 21 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:30,709 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 586 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:54:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2025-03-08 00:54:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 303. [2025-03-08 00:54:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 278 states have (on average 1.4712230215827338) internal successors, (409), 278 states have internal predecessors, (409), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 21 states have call predecessors, (86), 14 states have call successors, (86) [2025-03-08 00:54:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 510 transitions. [2025-03-08 00:54:30,733 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 510 transitions. Word has length 102 [2025-03-08 00:54:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:30,734 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 510 transitions. [2025-03-08 00:54:30,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:54:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 510 transitions. [2025-03-08 00:54:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2025-03-08 00:54:30,735 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:30,735 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:30,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2025-03-08 00:54:30,735 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:30,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1940200866, now seen corresponding path program 1 times [2025-03-08 00:54:30,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:30,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78626063] [2025-03-08 00:54:30,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:30,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:30,742 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 103 statements into 1 equivalence classes. [2025-03-08 00:54:30,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 103 of 103 statements. [2025-03-08 00:54:30,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:30,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 288 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 00:54:31,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:31,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78626063] [2025-03-08 00:54:31,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78626063] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:31,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752604872] [2025-03-08 00:54:31,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:31,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:31,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:31,218 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) [2025-03-08 00:54:31,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-08 00:54:31,255 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 103 statements into 1 equivalence classes. [2025-03-08 00:54:31,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 103 of 103 statements. [2025-03-08 00:54:31,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:31,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:31,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 00:54:31,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2025-03-08 00:54:31,541 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:54:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2025-03-08 00:54:31,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752604872] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:54:31,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:54:31,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 11] total 39 [2025-03-08 00:54:31,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56513060] [2025-03-08 00:54:31,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:54:31,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-08 00:54:31,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:31,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-08 00:54:31,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 00:54:31,909 INFO L87 Difference]: Start difference. First operand 303 states and 510 transitions. Second operand has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 37 states have internal predecessors, (121), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-08 00:54:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:34,739 INFO L93 Difference]: Finished difference Result 658 states and 1108 transitions. [2025-03-08 00:54:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2025-03-08 00:54:34,739 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 37 states have internal predecessors, (121), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 103 [2025-03-08 00:54:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:34,741 INFO L225 Difference]: With dead ends: 658 [2025-03-08 00:54:34,741 INFO L226 Difference]: Without dead ends: 386 [2025-03-08 00:54:34,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=833, Invalid=9673, Unknown=0, NotChecked=0, Total=10506 [2025-03-08 00:54:34,743 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 375 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 2845 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 2238 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:34,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 2238 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2845 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-08 00:54:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2025-03-08 00:54:34,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 292. [2025-03-08 00:54:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 267 states have (on average 1.4794007490636705) internal successors, (395), 267 states have internal predecessors, (395), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 21 states have call predecessors, (86), 14 states have call successors, (86) [2025-03-08 00:54:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 496 transitions. [2025-03-08 00:54:34,770 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 496 transitions. Word has length 103 [2025-03-08 00:54:34,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:34,770 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 496 transitions. [2025-03-08 00:54:34,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 37 states have internal predecessors, (121), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-08 00:54:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 496 transitions. [2025-03-08 00:54:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2025-03-08 00:54:34,771 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:34,771 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:34,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-08 00:54:34,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-03-08 00:54:34,972 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:34,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:34,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1321330927, now seen corresponding path program 1 times [2025-03-08 00:54:34,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:34,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396715967] [2025-03-08 00:54:34,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:34,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:34,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 104 statements into 1 equivalence classes. [2025-03-08 00:54:34,983 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 104 of 104 statements. [2025-03-08 00:54:34,983 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:34,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 322 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 00:54:35,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:35,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396715967] [2025-03-08 00:54:35,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396715967] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:35,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067866326] [2025-03-08 00:54:35,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:35,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:35,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:35,345 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) [2025-03-08 00:54:35,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-08 00:54:35,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 104 statements into 1 equivalence classes. [2025-03-08 00:54:35,409 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 104 of 104 statements. [2025-03-08 00:54:35,410 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:35,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:35,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-08 00:54:35,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 32 proven. 306 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 00:54:35,766 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:54:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 322 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 00:54:36,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067866326] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:54:36,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:54:36,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 61 [2025-03-08 00:54:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861098449] [2025-03-08 00:54:36,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:54:36,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-03-08 00:54:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:36,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-03-08 00:54:36,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2025-03-08 00:54:36,345 INFO L87 Difference]: Start difference. First operand 292 states and 496 transitions. Second operand has 61 states, 61 states have (on average 3.180327868852459) internal successors, (194), 61 states have internal predecessors, (194), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-08 00:54:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:39,998 INFO L93 Difference]: Finished difference Result 848 states and 1345 transitions. [2025-03-08 00:54:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-03-08 00:54:39,999 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.180327868852459) internal successors, (194), 61 states have internal predecessors, (194), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 104 [2025-03-08 00:54:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:40,002 INFO L225 Difference]: With dead ends: 848 [2025-03-08 00:54:40,002 INFO L226 Difference]: Without dead ends: 575 [2025-03-08 00:54:40,003 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2069, Invalid=4093, Unknown=0, NotChecked=0, Total=6162 [2025-03-08 00:54:40,003 INFO L435 NwaCegarLoop]: 167 mSDtfsCounter, 1483 mSDsluCounter, 4039 mSDsCounter, 0 mSdLazyCounter, 4173 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 4206 SdHoareTripleChecker+Invalid, 4571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 4173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:40,003 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1483 Valid, 4206 Invalid, 4571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 4173 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-08 00:54:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2025-03-08 00:54:40,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 297. [2025-03-08 00:54:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 272 states have (on average 1.474264705882353) internal successors, (401), 272 states have internal predecessors, (401), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 21 states have call predecessors, (86), 14 states have call successors, (86) [2025-03-08 00:54:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 502 transitions. [2025-03-08 00:54:40,032 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 502 transitions. Word has length 104 [2025-03-08 00:54:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:40,033 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 502 transitions. [2025-03-08 00:54:40,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.180327868852459) internal successors, (194), 61 states have internal predecessors, (194), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-08 00:54:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 502 transitions. [2025-03-08 00:54:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-08 00:54:40,034 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:40,034 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:40,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-08 00:54:40,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:40,235 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:40,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:40,235 INFO L85 PathProgramCache]: Analyzing trace with hash 311801510, now seen corresponding path program 1 times [2025-03-08 00:54:40,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:40,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610870731] [2025-03-08 00:54:40,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:40,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:40,240 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 105 statements into 1 equivalence classes. [2025-03-08 00:54:40,273 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 105 of 105 statements. [2025-03-08 00:54:40,274 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:40,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 322 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 00:54:40,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:40,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610870731] [2025-03-08 00:54:40,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610870731] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:40,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519032927] [2025-03-08 00:54:40,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:40,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:40,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:40,706 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:54:40,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-08 00:54:40,741 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 105 statements into 1 equivalence classes. [2025-03-08 00:54:40,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 105 of 105 statements. [2025-03-08 00:54:40,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:40,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:40,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-08 00:54:40,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2025-03-08 00:54:40,860 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:54:40,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519032927] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:54:40,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:54:40,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [23] total 29 [2025-03-08 00:54:40,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483927298] [2025-03-08 00:54:40,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:54:40,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 00:54:40,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:40,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 00:54:40,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:54:40,861 INFO L87 Difference]: Start difference. First operand 297 states and 502 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:54:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:54:40,936 INFO L93 Difference]: Finished difference Result 341 states and 557 transitions. [2025-03-08 00:54:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 00:54:40,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 105 [2025-03-08 00:54:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:54:40,938 INFO L225 Difference]: With dead ends: 341 [2025-03-08 00:54:40,938 INFO L226 Difference]: Without dead ends: 301 [2025-03-08 00:54:40,938 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:54:40,938 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 8 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:54:40,938 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 555 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:54:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2025-03-08 00:54:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2025-03-08 00:54:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 274 states have (on average 1.4708029197080292) internal successors, (403), 274 states have internal predecessors, (403), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 21 states have call predecessors, (86), 14 states have call successors, (86) [2025-03-08 00:54:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 504 transitions. [2025-03-08 00:54:40,975 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 504 transitions. Word has length 105 [2025-03-08 00:54:40,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:54:40,976 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 504 transitions. [2025-03-08 00:54:40,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 00:54:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 504 transitions. [2025-03-08 00:54:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-08 00:54:40,977 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:54:40,977 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:54:40,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-08 00:54:41,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-03-08 00:54:41,177 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:54:41,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:54:41,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1427936660, now seen corresponding path program 1 times [2025-03-08 00:54:41,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:54:41,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208545608] [2025-03-08 00:54:41,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:41,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:54:41,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-08 00:54:41,205 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-08 00:54:41,205 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:41,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 322 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 00:54:41,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:54:41,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208545608] [2025-03-08 00:54:41,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208545608] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:54:41,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011687158] [2025-03-08 00:54:41,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:54:41,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:54:41,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:54:41,707 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:54:41,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-08 00:54:41,743 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-08 00:54:42,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-08 00:54:42,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:54:42,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:54:42,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 76 conjuncts are in the unsatisfiable core [2025-03-08 00:54:42,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:54:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 10 proven. 322 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-08 00:54:43,188 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:54:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 10 proven. 322 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-08 00:54:45,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011687158] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:54:45,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:54:45,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 36, 35] total 90 [2025-03-08 00:54:45,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022492629] [2025-03-08 00:54:45,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:54:45,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2025-03-08 00:54:45,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:54:45,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2025-03-08 00:54:45,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=7314, Unknown=0, NotChecked=0, Total=8010 [2025-03-08 00:54:45,176 INFO L87 Difference]: Start difference. First operand 299 states and 504 transitions. Second operand has 90 states, 90 states have (on average 2.533333333333333) internal successors, (228), 86 states have internal predecessors, (228), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10)