./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_5a.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 f6c91769726962c1478685c30d57ac239987d5f8a5f6832d1d60b9c031f35855 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 14:03:47,419 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 14:03:47,473 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 14:03:47,476 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 14:03:47,477 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 14:03:47,502 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 14:03:47,503 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 14:03:47,503 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 14:03:47,504 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 14:03:47,504 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 14:03:47,504 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 14:03:47,505 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 14:03:47,505 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 14:03:47,505 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 14:03:47,505 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 14:03:47,505 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 14:03:47,505 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 14:03:47,505 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 14:03:47,506 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 14:03:47,506 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 14:03:47,506 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 14:03:47,506 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 14:03:47,506 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 14:03:47,506 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 14:03:47,506 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 14:03:47,506 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 14:03:47,506 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 14:03:47,506 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 14:03:47,506 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 14:03:47,507 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 14:03:47,507 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 14:03:47,507 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 14:03:47,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:03:47,507 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 14:03:47,507 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 14:03:47,508 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 14:03:47,508 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 14:03:47,508 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 14:03:47,508 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 14:03:47,508 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 14:03:47,508 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 14:03:47,508 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 14:03:47,508 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 14:03:47,508 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 -> f6c91769726962c1478685c30d57ac239987d5f8a5f6832d1d60b9c031f35855 [2025-03-16 14:03:47,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 14:03:47,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 14:03:47,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 14:03:47,733 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 14:03:47,733 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 14:03:47,734 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2025-03-16 14:03:48,883 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a905e2c/2b4a6e434d3541f19acb9c76941b8dd3/FLAG1bd2fb08f [2025-03-16 14:03:49,121 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 14:03:49,123 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2025-03-16 14:03:49,129 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a905e2c/2b4a6e434d3541f19acb9c76941b8dd3/FLAG1bd2fb08f [2025-03-16 14:03:49,452 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a905e2c/2b4a6e434d3541f19acb9c76941b8dd3 [2025-03-16 14:03:49,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 14:03:49,455 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 14:03:49,455 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 14:03:49,456 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 14:03:49,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 14:03:49,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,459 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d23d07f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49, skipping insertion in model container [2025-03-16 14:03:49,459 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,474 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 14:03:49,561 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_5a.c.cil.c[728,741] [2025-03-16 14:03:49,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:03:49,600 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 14:03:49,607 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_5a.c.cil.c[728,741] [2025-03-16 14:03:49,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:03:49,635 INFO L204 MainTranslator]: Completed translation [2025-03-16 14:03:49,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49 WrapperNode [2025-03-16 14:03:49,636 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 14:03:49,637 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 14:03:49,637 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 14:03:49,637 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 14:03:49,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,645 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,656 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2025-03-16 14:03:49,657 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 14:03:49,657 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 14:03:49,657 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 14:03:49,657 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 14:03:49,662 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,663 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,664 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,673 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-16 14:03:49,673 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,673 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,676 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,676 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,677 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,678 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 14:03:49,679 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 14:03:49,680 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 14:03:49,680 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 14:03:49,680 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (1/1) ... [2025-03-16 14:03:49,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:03:49,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:49,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 14:03:49,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 14:03:49,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 14:03:49,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 14:03:49,719 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2025-03-16 14:03:49,719 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2025-03-16 14:03:49,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 14:03:49,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 14:03:49,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 14:03:49,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 14:03:49,774 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 14:03:49,775 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 14:03:50,004 INFO L? ?]: Removed 60 outVars from TransFormulas that were not future-live. [2025-03-16 14:03:50,005 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 14:03:50,026 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 14:03:50,026 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 14:03:50,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:50 BoogieIcfgContainer [2025-03-16 14:03:50,026 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 14:03:50,028 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 14:03:50,028 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 14:03:50,031 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 14:03:50,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 02:03:49" (1/3) ... [2025-03-16 14:03:50,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3baa5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:03:50, skipping insertion in model container [2025-03-16 14:03:50,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:49" (2/3) ... [2025-03-16 14:03:50,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3baa5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:03:50, skipping insertion in model container [2025-03-16 14:03:50,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:50" (3/3) ... [2025-03-16 14:03:50,033 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2025-03-16 14:03:50,045 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 14:03:50,046 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_5a.c.cil.c that has 3 procedures, 70 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 14:03:50,086 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 14:03:50,095 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;@66239d0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 14:03:50,095 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 14:03:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 63 states have internal predecessors, (95), 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) [2025-03-16 14:03:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-16 14:03:50,107 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:50,107 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] [2025-03-16 14:03:50,107 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:50,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:50,111 INFO L85 PathProgramCache]: Analyzing trace with hash 197593468, now seen corresponding path program 1 times [2025-03-16 14:03:50,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:50,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355016367] [2025-03-16 14:03:50,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:50,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:50,169 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-16 14:03:50,203 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-16 14:03:50,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:50,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 14:03:50,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:50,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355016367] [2025-03-16 14:03:50,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355016367] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:50,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:50,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 14:03:50,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429291792] [2025-03-16 14:03:50,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:50,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:50,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:50,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:50,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:50,352 INFO L87 Difference]: Start difference. First operand has 70 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 63 states have internal predecessors, (95), 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 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2025-03-16 14:03:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:50,403 INFO L93 Difference]: Finished difference Result 165 states and 255 transitions. [2025-03-16 14:03:50,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:50,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 40 [2025-03-16 14:03:50,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:50,411 INFO L225 Difference]: With dead ends: 165 [2025-03-16 14:03:50,411 INFO L226 Difference]: Without dead ends: 65 [2025-03-16 14:03:50,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:50,415 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 35 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 181 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 [2025-03-16 14:03:50,416 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 181 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:50,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-16 14:03:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2025-03-16 14:03:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 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) [2025-03-16 14:03:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 93 transitions. [2025-03-16 14:03:50,441 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 93 transitions. Word has length 40 [2025-03-16 14:03:50,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:50,443 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 93 transitions. [2025-03-16 14:03:50,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2025-03-16 14:03:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 93 transitions. [2025-03-16 14:03:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:50,445 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:50,445 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] [2025-03-16 14:03:50,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 14:03:50,446 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:50,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:50,446 INFO L85 PathProgramCache]: Analyzing trace with hash -751769569, now seen corresponding path program 1 times [2025-03-16 14:03:50,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:50,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484489794] [2025-03-16 14:03:50,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:50,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:50,457 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:50,466 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:50,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:50,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 14:03:50,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:50,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484489794] [2025-03-16 14:03:50,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484489794] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:50,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:50,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:50,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103635545] [2025-03-16 14:03:50,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:50,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:50,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:50,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:50,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:50,562 INFO L87 Difference]: Start difference. First operand 65 states and 93 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2025-03-16 14:03:50,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:50,606 INFO L93 Difference]: Finished difference Result 101 states and 143 transitions. [2025-03-16 14:03:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:50,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 42 [2025-03-16 14:03:50,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:50,608 INFO L225 Difference]: With dead ends: 101 [2025-03-16 14:03:50,608 INFO L226 Difference]: Without dead ends: 65 [2025-03-16 14:03:50,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:50,609 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 35 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 253 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 [2025-03-16 14:03:50,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 253 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-16 14:03:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2025-03-16 14:03:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 58 states have internal predecessors, (83), 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) [2025-03-16 14:03:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 92 transitions. [2025-03-16 14:03:50,615 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 92 transitions. Word has length 42 [2025-03-16 14:03:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:50,616 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 92 transitions. [2025-03-16 14:03:50,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2025-03-16 14:03:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 92 transitions. [2025-03-16 14:03:50,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:50,617 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:50,617 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] [2025-03-16 14:03:50,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 14:03:50,617 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:50,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:50,618 INFO L85 PathProgramCache]: Analyzing trace with hash -622686850, now seen corresponding path program 1 times [2025-03-16 14:03:50,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:50,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757672338] [2025-03-16 14:03:50,618 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:50,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:50,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:50,640 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:50,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:50,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:50,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:50,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757672338] [2025-03-16 14:03:50,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757672338] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:50,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731092021] [2025-03-16 14:03:50,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:50,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:50,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:50,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:50,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 14:03:50,792 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:50,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:50,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:50,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:50,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 14:03:50,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:50,861 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:50,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731092021] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:50,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:50,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:03:50,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448334438] [2025-03-16 14:03:50,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:50,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:50,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:50,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:50,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:50,863 INFO L87 Difference]: Start difference. First operand 65 states and 92 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2025-03-16 14:03:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:50,942 INFO L93 Difference]: Finished difference Result 147 states and 213 transitions. [2025-03-16 14:03:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:50,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 42 [2025-03-16 14:03:50,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:50,944 INFO L225 Difference]: With dead ends: 147 [2025-03-16 14:03:50,945 INFO L226 Difference]: Without dead ends: 84 [2025-03-16 14:03:50,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:50,946 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 19 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 196 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 [2025-03-16 14:03:50,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 196 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-16 14:03:50,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2025-03-16 14:03:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 69 states have internal predecessors, (98), 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) [2025-03-16 14:03:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2025-03-16 14:03:50,954 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 42 [2025-03-16 14:03:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:50,954 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2025-03-16 14:03:50,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2025-03-16 14:03:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2025-03-16 14:03:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 14:03:50,957 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:50,958 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] [2025-03-16 14:03:50,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:51,158 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 [2025-03-16 14:03:51,158 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:51,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:51,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1822871830, now seen corresponding path program 1 times [2025-03-16 14:03:51,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:51,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810607719] [2025-03-16 14:03:51,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:51,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:51,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-16 14:03:51,167 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 14:03:51,168 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:51,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:51,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:51,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810607719] [2025-03-16 14:03:51,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810607719] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:51,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514208436] [2025-03-16 14:03:51,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:51,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:51,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:51,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:51,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 14:03:51,302 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-16 14:03:51,321 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 14:03:51,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:51,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:51,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:03:51,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:51,348 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:51,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514208436] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:51,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:51,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:03:51,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395921250] [2025-03-16 14:03:51,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:51,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:51,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:51,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:51,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:51,349 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2025-03-16 14:03:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:51,408 INFO L93 Difference]: Finished difference Result 162 states and 232 transitions. [2025-03-16 14:03:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:51,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 44 [2025-03-16 14:03:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:51,410 INFO L225 Difference]: With dead ends: 162 [2025-03-16 14:03:51,410 INFO L226 Difference]: Without dead ends: 91 [2025-03-16 14:03:51,410 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:51,411 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 14 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 212 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 [2025-03-16 14:03:51,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 212 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-16 14:03:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2025-03-16 14:03:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 73 states have internal predecessors, (102), 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) [2025-03-16 14:03:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2025-03-16 14:03:51,417 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 44 [2025-03-16 14:03:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:51,417 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2025-03-16 14:03:51,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2025-03-16 14:03:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2025-03-16 14:03:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:51,418 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:51,418 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] [2025-03-16 14:03:51,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 14:03:51,618 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 [2025-03-16 14:03:51,619 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:51,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:51,619 INFO L85 PathProgramCache]: Analyzing trace with hash -357972097, now seen corresponding path program 1 times [2025-03-16 14:03:51,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:51,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22021548] [2025-03-16 14:03:51,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:51,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:51,625 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:51,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:51,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:51,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:51,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:51,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22021548] [2025-03-16 14:03:51,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22021548] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:51,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526396779] [2025-03-16 14:03:51,696 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:51,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:51,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:51,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:51,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 14:03:51,735 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:51,753 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:51,753 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:51,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:51,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:03:51,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:51,781 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:51,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526396779] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:51,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:51,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:03:51,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415304665] [2025-03-16 14:03:51,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:51,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:51,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:51,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:51,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:51,783 INFO L87 Difference]: Start difference. First operand 81 states and 115 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) [2025-03-16 14:03:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:51,838 INFO L93 Difference]: Finished difference Result 167 states and 240 transitions. [2025-03-16 14:03:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:51,838 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 [2025-03-16 14:03:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:51,839 INFO L225 Difference]: With dead ends: 167 [2025-03-16 14:03:51,839 INFO L226 Difference]: Without dead ends: 92 [2025-03-16 14:03:51,839 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 [2025-03-16 14:03:51,840 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 15 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 214 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 [2025-03-16 14:03:51,840 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 214 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-16 14:03:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2025-03-16 14:03:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.4246575342465753) internal successors, (104), 74 states have internal predecessors, (104), 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) [2025-03-16 14:03:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 117 transitions. [2025-03-16 14:03:51,845 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 117 transitions. Word has length 45 [2025-03-16 14:03:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:51,845 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 117 transitions. [2025-03-16 14:03:51,846 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) [2025-03-16 14:03:51,846 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 117 transitions. [2025-03-16 14:03:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:03:51,846 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:51,847 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] [2025-03-16 14:03:51,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:52,047 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 [2025-03-16 14:03:52,047 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:52,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:52,048 INFO L85 PathProgramCache]: Analyzing trace with hash -361140892, now seen corresponding path program 1 times [2025-03-16 14:03:52,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:52,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734743357] [2025-03-16 14:03:52,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:52,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:52,054 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:03:52,061 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:52,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:52,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:52,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734743357] [2025-03-16 14:03:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734743357] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322121008] [2025-03-16 14:03:52,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:52,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:52,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:52,143 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:52,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 14:03:52,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:03:52,193 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:52,193 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:52,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:52,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 14:03:52,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:52,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:52,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322121008] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:52,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:52,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-16 14:03:52,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560105473] [2025-03-16 14:03:52,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:52,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 14:03:52,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:52,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 14:03:52,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:03:52,330 INFO L87 Difference]: Start difference. First operand 82 states and 117 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 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) [2025-03-16 14:03:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:52,450 INFO L93 Difference]: Finished difference Result 215 states and 316 transitions. [2025-03-16 14:03:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:03:52,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 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 46 [2025-03-16 14:03:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:52,452 INFO L225 Difference]: With dead ends: 215 [2025-03-16 14:03:52,452 INFO L226 Difference]: Without dead ends: 139 [2025-03-16 14:03:52,452 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:52,453 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 117 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:52,453 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 319 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2025-03-16 14:03:52,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 93. [2025-03-16 14:03:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 84 states have (on average 1.4761904761904763) internal successors, (124), 85 states have internal predecessors, (124), 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) [2025-03-16 14:03:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 137 transitions. [2025-03-16 14:03:52,462 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 137 transitions. Word has length 46 [2025-03-16 14:03:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:52,462 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 137 transitions. [2025-03-16 14:03:52,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 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) [2025-03-16 14:03:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 137 transitions. [2025-03-16 14:03:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 14:03:52,464 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:52,464 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] [2025-03-16 14:03:52,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:52,664 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 [2025-03-16 14:03:52,665 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:52,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1024197631, now seen corresponding path program 1 times [2025-03-16 14:03:52,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:52,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042553266] [2025-03-16 14:03:52,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:52,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:52,671 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:03:52,677 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:03:52,677 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:52,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:52,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:52,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042553266] [2025-03-16 14:03:52,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042553266] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:52,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329225464] [2025-03-16 14:03:52,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:52,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:52,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:52,745 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:52,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 14:03:52,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:03:52,804 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:03:52,805 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:52,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:52,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 14:03:52,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:52,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:52,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329225464] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:52,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:52,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-16 14:03:52,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933938327] [2025-03-16 14:03:52,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:52,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 14:03:52,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:52,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 14:03:52,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:03:52,907 INFO L87 Difference]: Start difference. First operand 93 states and 137 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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) [2025-03-16 14:03:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:53,022 INFO L93 Difference]: Finished difference Result 228 states and 342 transitions. [2025-03-16 14:03:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:03:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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 [2025-03-16 14:03:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:53,023 INFO L225 Difference]: With dead ends: 228 [2025-03-16 14:03:53,023 INFO L226 Difference]: Without dead ends: 141 [2025-03-16 14:03:53,024 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 [2025-03-16 14:03:53,024 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 111 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:53,024 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 372 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2025-03-16 14:03:53,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 99. [2025-03-16 14:03:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.511111111111111) internal successors, (136), 91 states have internal predecessors, (136), 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) [2025-03-16 14:03:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 149 transitions. [2025-03-16 14:03:53,041 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 149 transitions. Word has length 47 [2025-03-16 14:03:53,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:53,041 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 149 transitions. [2025-03-16 14:03:53,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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) [2025-03-16 14:03:53,041 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 149 transitions. [2025-03-16 14:03:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 14:03:53,042 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:53,042 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] [2025-03-16 14:03:53,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:53,247 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 [2025-03-16 14:03:53,247 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:53,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:53,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1839765795, now seen corresponding path program 1 times [2025-03-16 14:03:53,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:53,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567618132] [2025-03-16 14:03:53,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:53,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:53,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:03:53,255 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:03:53,255 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:53,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:03:53,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:53,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567618132] [2025-03-16 14:03:53,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567618132] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:53,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816860676] [2025-03-16 14:03:53,274 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:53,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:53,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:53,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:53,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 14:03:53,305 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:03:53,319 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:03:53,319 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:53,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:53,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 14:03:53,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 14:03:53,325 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:53,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816860676] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:53,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:53,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2025-03-16 14:03:53,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316312505] [2025-03-16 14:03:53,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:53,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:53,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:53,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:53,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:53,326 INFO L87 Difference]: Start difference. First operand 99 states and 149 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2025-03-16 14:03:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:53,366 INFO L93 Difference]: Finished difference Result 197 states and 303 transitions. [2025-03-16 14:03:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:53,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 49 [2025-03-16 14:03:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:53,367 INFO L225 Difference]: With dead ends: 197 [2025-03-16 14:03:53,367 INFO L226 Difference]: Without dead ends: 104 [2025-03-16 14:03:53,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:53,368 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 154 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 [2025-03-16 14:03:53,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 154 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-16 14:03:53,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2025-03-16 14:03:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.4942528735632183) internal successors, (130), 88 states have internal predecessors, (130), 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) [2025-03-16 14:03:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 143 transitions. [2025-03-16 14:03:53,377 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 143 transitions. Word has length 49 [2025-03-16 14:03:53,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:53,377 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 143 transitions. [2025-03-16 14:03:53,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2025-03-16 14:03:53,377 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 143 transitions. [2025-03-16 14:03:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 14:03:53,380 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:53,380 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] [2025-03-16 14:03:53,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:53,580 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 [2025-03-16 14:03:53,581 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:53,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:53,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1979925521, now seen corresponding path program 1 times [2025-03-16 14:03:53,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:53,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252469051] [2025-03-16 14:03:53,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:53,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:53,587 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:03:53,594 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:03:53,594 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:53,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:03:53,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:53,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252469051] [2025-03-16 14:03:53,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252469051] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:53,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153455535] [2025-03-16 14:03:53,630 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:53,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:53,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:53,632 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:53,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 14:03:53,666 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:03:53,681 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:03:53,682 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:53,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:53,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 14:03:53,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 14:03:53,695 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:53,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153455535] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:53,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:53,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2025-03-16 14:03:53,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350300035] [2025-03-16 14:03:53,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:53,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:53,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:53,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:53,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:53,695 INFO L87 Difference]: Start difference. First operand 96 states and 143 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2025-03-16 14:03:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:53,735 INFO L93 Difference]: Finished difference Result 194 states and 295 transitions. [2025-03-16 14:03:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:53,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 49 [2025-03-16 14:03:53,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:53,736 INFO L225 Difference]: With dead ends: 194 [2025-03-16 14:03:53,736 INFO L226 Difference]: Without dead ends: 104 [2025-03-16 14:03:53,737 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:53,737 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 156 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 [2025-03-16 14:03:53,737 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 156 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:53,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-16 14:03:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2025-03-16 14:03:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.4772727272727273) internal successors, (130), 89 states have internal predecessors, (130), 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) [2025-03-16 14:03:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 143 transitions. [2025-03-16 14:03:53,745 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 143 transitions. Word has length 49 [2025-03-16 14:03:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:53,746 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 143 transitions. [2025-03-16 14:03:53,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2025-03-16 14:03:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 143 transitions. [2025-03-16 14:03:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 14:03:53,747 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:53,747 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] [2025-03-16 14:03:53,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:53,951 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 [2025-03-16 14:03:53,951 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:53,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash -444057202, now seen corresponding path program 1 times [2025-03-16 14:03:53,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:53,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591161770] [2025-03-16 14:03:53,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:53,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:53,957 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:53,965 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:53,965 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:53,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:03:54,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:54,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591161770] [2025-03-16 14:03:54,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591161770] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:54,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661394177] [2025-03-16 14:03:54,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:54,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:54,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:54,015 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:54,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 14:03:54,049 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:54,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:54,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:54,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:54,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 14:03:54,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 14:03:54,113 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:54,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661394177] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:54,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:54,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 14:03:54,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890041178] [2025-03-16 14:03:54,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:54,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:54,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:54,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:54,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:54,115 INFO L87 Difference]: Start difference. First operand 97 states and 143 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) [2025-03-16 14:03:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:54,152 INFO L93 Difference]: Finished difference Result 195 states and 291 transitions. [2025-03-16 14:03:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:54,153 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 [2025-03-16 14:03:54,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:54,153 INFO L225 Difference]: With dead ends: 195 [2025-03-16 14:03:54,153 INFO L226 Difference]: Without dead ends: 104 [2025-03-16 14:03:54,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:54,154 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 5 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 159 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 [2025-03-16 14:03:54,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 159 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-16 14:03:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2025-03-16 14:03:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.471264367816092) internal successors, (128), 88 states have internal predecessors, (128), 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) [2025-03-16 14:03:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 141 transitions. [2025-03-16 14:03:54,160 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 141 transitions. Word has length 50 [2025-03-16 14:03:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:54,160 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 141 transitions. [2025-03-16 14:03:54,160 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) [2025-03-16 14:03:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 141 transitions. [2025-03-16 14:03:54,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 14:03:54,160 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:54,160 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] [2025-03-16 14:03:54,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:54,361 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 [2025-03-16 14:03:54,361 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:54,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:54,362 INFO L85 PathProgramCache]: Analyzing trace with hash -491902240, now seen corresponding path program 1 times [2025-03-16 14:03:54,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:54,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987369860] [2025-03-16 14:03:54,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:54,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:54,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:54,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:54,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:54,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:54,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:54,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987369860] [2025-03-16 14:03:54,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987369860] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:54,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395341287] [2025-03-16 14:03:54,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:54,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:54,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:54,442 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:54,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 14:03:54,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:54,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:54,493 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:54,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:54,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 14:03:54,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 14:03:54,532 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 14:03:54,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395341287] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:54,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:54,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2025-03-16 14:03:54,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316139126] [2025-03-16 14:03:54,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:54,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 14:03:54,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:54,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 14:03:54,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:03:54,625 INFO L87 Difference]: Start difference. First operand 96 states and 141 transitions. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 11 states have internal predecessors, (74), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-16 14:03:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:54,802 INFO L93 Difference]: Finished difference Result 208 states and 305 transitions. [2025-03-16 14:03:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 14:03:54,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 11 states have internal predecessors, (74), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 50 [2025-03-16 14:03:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:54,804 INFO L225 Difference]: With dead ends: 208 [2025-03-16 14:03:54,804 INFO L226 Difference]: Without dead ends: 118 [2025-03-16 14:03:54,804 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2025-03-16 14:03:54,804 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 98 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:54,804 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 531 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-16 14:03:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2025-03-16 14:03:54,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.4074074074074074) internal successors, (114), 82 states have internal predecessors, (114), 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) [2025-03-16 14:03:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 127 transitions. [2025-03-16 14:03:54,810 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 127 transitions. Word has length 50 [2025-03-16 14:03:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:54,810 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 127 transitions. [2025-03-16 14:03:54,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 11 states have internal predecessors, (74), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-16 14:03:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 127 transitions. [2025-03-16 14:03:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 14:03:54,811 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:54,811 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, 1, 1] [2025-03-16 14:03:54,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 14:03:55,011 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 [2025-03-16 14:03:55,011 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:55,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:55,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1243493433, now seen corresponding path program 1 times [2025-03-16 14:03:55,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:55,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702300845] [2025-03-16 14:03:55,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:55,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:55,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 14:03:55,024 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 14:03:55,024 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:55,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:55,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:55,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702300845] [2025-03-16 14:03:55,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702300845] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:55,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:55,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-16 14:03:55,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434174891] [2025-03-16 14:03:55,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:55,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:03:55,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:55,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:03:55,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:03:55,178 INFO L87 Difference]: Start difference. First operand 90 states and 127 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 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) [2025-03-16 14:03:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:55,244 INFO L93 Difference]: Finished difference Result 143 states and 202 transitions. [2025-03-16 14:03:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:03:55,245 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 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 53 [2025-03-16 14:03:55,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:55,245 INFO L225 Difference]: With dead ends: 143 [2025-03-16 14:03:55,245 INFO L226 Difference]: Without dead ends: 110 [2025-03-16 14:03:55,246 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:03:55,246 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 5 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:55,246 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 456 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:55,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-03-16 14:03:55,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2025-03-16 14:03:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 93 states have (on average 1.3548387096774193) internal successors, (126), 95 states have internal predecessors, (126), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2025-03-16 14:03:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 150 transitions. [2025-03-16 14:03:55,254 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 150 transitions. Word has length 53 [2025-03-16 14:03:55,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:55,254 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 150 transitions. [2025-03-16 14:03:55,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 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) [2025-03-16 14:03:55,254 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 150 transitions. [2025-03-16 14:03:55,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 14:03:55,255 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:55,255 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, 1, 1] [2025-03-16 14:03:55,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-16 14:03:55,255 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:55,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:55,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1254522504, now seen corresponding path program 1 times [2025-03-16 14:03:55,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:55,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791400909] [2025-03-16 14:03:55,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:55,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:55,259 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 14:03:55,268 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 14:03:55,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:55,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:03:55,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:55,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791400909] [2025-03-16 14:03:55,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791400909] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:55,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407915449] [2025-03-16 14:03:55,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:55,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:55,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:55,388 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:55,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 14:03:55,418 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 14:03:55,432 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 14:03:55,432 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:55,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:55,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 14:03:55,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:03:55,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 14:03:55,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407915449] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:55,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:03:55,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 8] total 10 [2025-03-16 14:03:55,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186996764] [2025-03-16 14:03:55,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:55,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:55,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:55,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:55,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:03:55,517 INFO L87 Difference]: Start difference. First operand 105 states and 150 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), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:55,557 INFO L93 Difference]: Finished difference Result 115 states and 160 transitions. [2025-03-16 14:03:55,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:55,558 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), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2025-03-16 14:03:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:55,559 INFO L225 Difference]: With dead ends: 115 [2025-03-16 14:03:55,559 INFO L226 Difference]: Without dead ends: 109 [2025-03-16 14:03:55,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:03:55,559 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:55,559 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 226 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-03-16 14:03:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2025-03-16 14:03:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 99 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2025-03-16 14:03:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2025-03-16 14:03:55,565 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 53 [2025-03-16 14:03:55,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:55,566 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2025-03-16 14:03:55,566 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), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2025-03-16 14:03:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 14:03:55,566 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:55,567 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, 1, 1] [2025-03-16 14:03:55,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:55,770 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,SelfDestructingSolverStorable12 [2025-03-16 14:03:55,770 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:55,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:55,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1283151655, now seen corresponding path program 1 times [2025-03-16 14:03:55,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:55,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560955688] [2025-03-16 14:03:55,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:55,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:55,774 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 14:03:55,789 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 14:03:55,789 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:55,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 14:03:55,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:55,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560955688] [2025-03-16 14:03:55,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560955688] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:55,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:55,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:03:55,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838468005] [2025-03-16 14:03:55,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:55,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:03:55,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:55,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:03:55,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:55,838 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2025-03-16 14:03:55,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:55,868 INFO L93 Difference]: Finished difference Result 115 states and 159 transitions. [2025-03-16 14:03:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:03:55,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 53 [2025-03-16 14:03:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:55,869 INFO L225 Difference]: With dead ends: 115 [2025-03-16 14:03:55,869 INFO L226 Difference]: Without dead ends: 98 [2025-03-16 14:03:55,869 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 [2025-03-16 14:03:55,870 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 1 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:55,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 404 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:55,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-16 14:03:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2025-03-16 14:03:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.3488372093023255) internal successors, (116), 89 states have internal predecessors, (116), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2025-03-16 14:03:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 137 transitions. [2025-03-16 14:03:55,875 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 137 transitions. Word has length 53 [2025-03-16 14:03:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:55,875 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 137 transitions. [2025-03-16 14:03:55,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2025-03-16 14:03:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 137 transitions. [2025-03-16 14:03:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 14:03:55,876 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:55,876 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] [2025-03-16 14:03:55,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-16 14:03:55,876 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:55,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:55,876 INFO L85 PathProgramCache]: Analyzing trace with hash -969115825, now seen corresponding path program 1 times [2025-03-16 14:03:55,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:55,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448821009] [2025-03-16 14:03:55,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:55,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:55,881 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-16 14:03:55,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 14:03:55,891 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:55,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 14:03:56,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:56,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448821009] [2025-03-16 14:03:56,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448821009] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:56,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99105814] [2025-03-16 14:03:56,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:56,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:56,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:56,010 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:56,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 14:03:56,045 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-16 14:03:56,063 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 14:03:56,063 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:56,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:56,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 14:03:56,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 14:03:56,190 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:56,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99105814] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:56,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:56,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2025-03-16 14:03:56,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618095607] [2025-03-16 14:03:56,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:56,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:03:56,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:56,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:03:56,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:03:56,192 INFO L87 Difference]: Start difference. First operand 98 states and 137 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 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) [2025-03-16 14:03:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:56,275 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2025-03-16 14:03:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:03:56,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 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 61 [2025-03-16 14:03:56,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:56,276 INFO L225 Difference]: With dead ends: 144 [2025-03-16 14:03:56,277 INFO L226 Difference]: Without dead ends: 101 [2025-03-16 14:03:56,277 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:03:56,277 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 31 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:56,279 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 595 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-03-16 14:03:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2025-03-16 14:03:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 88 states have (on average 1.3409090909090908) internal successors, (118), 92 states have internal predecessors, (118), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-16 14:03:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 140 transitions. [2025-03-16 14:03:56,288 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 140 transitions. Word has length 61 [2025-03-16 14:03:56,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:56,289 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 140 transitions. [2025-03-16 14:03:56,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 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) [2025-03-16 14:03:56,289 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 140 transitions. [2025-03-16 14:03:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 14:03:56,292 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:56,292 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] [2025-03-16 14:03:56,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:56,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-16 14:03:56,493 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:56,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:56,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1958943625, now seen corresponding path program 2 times [2025-03-16 14:03:56,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:56,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550453787] [2025-03-16 14:03:56,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:03:56,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:56,502 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 61 statements into 2 equivalence classes. [2025-03-16 14:03:56,514 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 28 of 61 statements. [2025-03-16 14:03:56,514 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-16 14:03:56,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 14:03:56,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:56,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550453787] [2025-03-16 14:03:56,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550453787] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:56,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:56,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-16 14:03:56,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718654885] [2025-03-16 14:03:56,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:56,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:03:56,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:56,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:03:56,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:56,590 INFO L87 Difference]: Start difference. First operand 101 states and 140 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) [2025-03-16 14:03:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:56,645 INFO L93 Difference]: Finished difference Result 141 states and 190 transitions. [2025-03-16 14:03:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 14:03:56,645 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 61 [2025-03-16 14:03:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:56,646 INFO L225 Difference]: With dead ends: 141 [2025-03-16 14:03:56,646 INFO L226 Difference]: Without dead ends: 101 [2025-03-16 14:03:56,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:56,646 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 1 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:56,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 445 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-03-16 14:03:56,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2025-03-16 14:03:56,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 85 states have (on average 1.3529411764705883) internal successors, (115), 88 states have internal predecessors, (115), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 14:03:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2025-03-16 14:03:56,653 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 61 [2025-03-16 14:03:56,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:56,653 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2025-03-16 14:03:56,653 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) [2025-03-16 14:03:56,653 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2025-03-16 14:03:56,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-16 14:03:56,654 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:56,654 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2025-03-16 14:03:56,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-16 14:03:56,654 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:56,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1343907714, now seen corresponding path program 1 times [2025-03-16 14:03:56,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:56,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080601030] [2025-03-16 14:03:56,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:56,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:56,659 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-16 14:03:56,665 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-16 14:03:56,665 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:56,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 14:03:56,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:56,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080601030] [2025-03-16 14:03:56,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080601030] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:56,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:56,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:56,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367615647] [2025-03-16 14:03:56,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:56,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:56,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:56,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:56,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:56,742 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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) [2025-03-16 14:03:56,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:56,795 INFO L93 Difference]: Finished difference Result 193 states and 256 transitions. [2025-03-16 14:03:56,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:56,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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 66 [2025-03-16 14:03:56,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:56,796 INFO L225 Difference]: With dead ends: 193 [2025-03-16 14:03:56,796 INFO L226 Difference]: Without dead ends: 105 [2025-03-16 14:03:56,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:56,796 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 9 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 217 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 [2025-03-16 14:03:56,797 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 217 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-16 14:03:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2025-03-16 14:03:56,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 83 states have (on average 1.3373493975903614) internal successors, (111), 86 states have internal predecessors, (111), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 14:03:56,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2025-03-16 14:03:56,802 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 66 [2025-03-16 14:03:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:56,802 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2025-03-16 14:03:56,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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) [2025-03-16 14:03:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2025-03-16 14:03:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-16 14:03:56,802 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:56,802 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:56,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-16 14:03:56,803 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:56,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:56,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1010998395, now seen corresponding path program 1 times [2025-03-16 14:03:56,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:56,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402216899] [2025-03-16 14:03:56,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:56,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:56,808 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-16 14:03:56,813 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-16 14:03:56,813 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:56,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 14:03:56,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:56,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402216899] [2025-03-16 14:03:56,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402216899] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:56,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902775673] [2025-03-16 14:03:56,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:56,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:56,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:56,931 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:56,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 14:03:56,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-16 14:03:56,983 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-16 14:03:56,984 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:56,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:56,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-16 14:03:56,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 14:03:57,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 14:03:57,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902775673] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:57,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:57,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2025-03-16 14:03:57,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427264779] [2025-03-16 14:03:57,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:57,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 14:03:57,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:57,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 14:03:57,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:03:57,105 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 12 states have internal predecessors, (54), 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) [2025-03-16 14:03:57,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:57,187 INFO L93 Difference]: Finished difference Result 139 states and 183 transitions. [2025-03-16 14:03:57,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:03:57,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 12 states have internal predecessors, (54), 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 66 [2025-03-16 14:03:57,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:57,188 INFO L225 Difference]: With dead ends: 139 [2025-03-16 14:03:57,188 INFO L226 Difference]: Without dead ends: 94 [2025-03-16 14:03:57,188 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:03:57,188 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:57,189 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 819 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2025-03-16 14:03:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2025-03-16 14:03:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 83 states have (on average 1.2891566265060241) internal successors, (107), 86 states have internal predecessors, (107), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2025-03-16 14:03:57,194 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 66 [2025-03-16 14:03:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:57,194 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2025-03-16 14:03:57,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 12 states have internal predecessors, (54), 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) [2025-03-16 14:03:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2025-03-16 14:03:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-16 14:03:57,195 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:57,195 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, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:57,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-16 14:03:57,395 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,SelfDestructingSolverStorable17 [2025-03-16 14:03:57,395 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:57,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1424702308, now seen corresponding path program 1 times [2025-03-16 14:03:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:57,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792287661] [2025-03-16 14:03:57,396 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:57,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:57,401 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-16 14:03:57,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 14:03:57,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:57,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 14:03:57,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:57,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792287661] [2025-03-16 14:03:57,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792287661] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:57,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476035212] [2025-03-16 14:03:57,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:57,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:57,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:57,481 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:57,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 14:03:57,515 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-16 14:03:57,537 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 14:03:57,537 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:57,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:57,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:03:57,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-16 14:03:57,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-16 14:03:57,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476035212] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:57,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:57,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 8] total 16 [2025-03-16 14:03:57,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343092732] [2025-03-16 14:03:57,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:57,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 14:03:57,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:57,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 14:03:57,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:03:57,773 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 14 states have internal predecessors, (77), 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) [2025-03-16 14:03:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:58,107 INFO L93 Difference]: Finished difference Result 210 states and 269 transitions. [2025-03-16 14:03:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-16 14:03:58,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 14 states have internal predecessors, (77), 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 69 [2025-03-16 14:03:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:58,109 INFO L225 Difference]: With dead ends: 210 [2025-03-16 14:03:58,109 INFO L226 Difference]: Without dead ends: 122 [2025-03-16 14:03:58,109 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2025-03-16 14:03:58,110 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 25 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:58,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 802 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-03-16 14:03:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2025-03-16 14:03:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 92 states have internal predecessors, (114), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2025-03-16 14:03:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 130 transitions. [2025-03-16 14:03:58,116 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 130 transitions. Word has length 69 [2025-03-16 14:03:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:58,117 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 130 transitions. [2025-03-16 14:03:58,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 14 states have internal predecessors, (77), 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) [2025-03-16 14:03:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 130 transitions. [2025-03-16 14:03:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-03-16 14:03:58,117 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:58,118 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:58,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:58,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:58,318 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:58,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:58,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1089678609, now seen corresponding path program 1 times [2025-03-16 14:03:58,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:58,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022660689] [2025-03-16 14:03:58,319 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:58,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:58,324 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-03-16 14:03:58,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-03-16 14:03:58,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:58,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 14:03:58,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:58,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022660689] [2025-03-16 14:03:58,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022660689] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:58,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437254393] [2025-03-16 14:03:58,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:58,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:58,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:58,427 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:58,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 14:03:58,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-03-16 14:03:58,483 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-03-16 14:03:58,483 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:58,483 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:58,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 14:03:58,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 14:03:58,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 14:03:58,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437254393] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:58,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:58,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-03-16 14:03:58,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440794470] [2025-03-16 14:03:58,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:58,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 14:03:58,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:58,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 14:03:58,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2025-03-16 14:03:58,669 INFO L87 Difference]: Start difference. First operand 102 states and 130 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 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) [2025-03-16 14:03:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:58,838 INFO L93 Difference]: Finished difference Result 295 states and 384 transitions. [2025-03-16 14:03:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 14:03:58,839 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 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 70 [2025-03-16 14:03:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:58,840 INFO L225 Difference]: With dead ends: 295 [2025-03-16 14:03:58,840 INFO L226 Difference]: Without dead ends: 193 [2025-03-16 14:03:58,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2025-03-16 14:03:58,840 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 210 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:58,841 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 491 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:58,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2025-03-16 14:03:58,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 114. [2025-03-16 14:03:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 102 states have (on average 1.2941176470588236) internal successors, (132), 104 states have internal predecessors, (132), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2025-03-16 14:03:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 148 transitions. [2025-03-16 14:03:58,847 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 148 transitions. Word has length 70 [2025-03-16 14:03:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:58,848 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 148 transitions. [2025-03-16 14:03:58,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 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) [2025-03-16 14:03:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 148 transitions. [2025-03-16 14:03:58,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-16 14:03:58,848 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:58,848 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:58,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 14:03:59,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:59,050 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:59,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:59,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1492109303, now seen corresponding path program 1 times [2025-03-16 14:03:59,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:59,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286704014] [2025-03-16 14:03:59,050 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:59,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:59,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-16 14:03:59,073 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 14:03:59,074 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:59,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 14:03:59,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:59,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286704014] [2025-03-16 14:03:59,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286704014] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:59,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758439217] [2025-03-16 14:03:59,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:59,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:59,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:59,187 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) [2025-03-16 14:03:59,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 14:03:59,222 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-16 14:03:59,380 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 14:03:59,380 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:59,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:59,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-16 14:03:59,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-03-16 14:03:59,440 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-03-16 14:03:59,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758439217] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:59,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:59,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 18 [2025-03-16 14:03:59,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933604356] [2025-03-16 14:03:59,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:59,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 14:03:59,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:59,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 14:03:59,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:03:59,560 INFO L87 Difference]: Start difference. First operand 114 states and 148 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 16 states have internal predecessors, (80), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-16 14:03:59,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:59,818 INFO L93 Difference]: Finished difference Result 209 states and 272 transitions. [2025-03-16 14:03:59,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 14:03:59,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 16 states have internal predecessors, (80), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2025-03-16 14:03:59,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:59,819 INFO L225 Difference]: With dead ends: 209 [2025-03-16 14:03:59,819 INFO L226 Difference]: Without dead ends: 0 [2025-03-16 14:03:59,819 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2025-03-16 14:03:59,820 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:59,820 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 269 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-16 14:03:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-16 14:03:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:03:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-16 14:03:59,821 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2025-03-16 14:03:59,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:59,821 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-16 14:03:59,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 16 states have internal predecessors, (80), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-16 14:03:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-16 14:03:59,821 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-16 14:03:59,823 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-16 14:03:59,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:00,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:00,026 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:00,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-16 14:04:00,560 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-16 14:04:00,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.03 02:04:00 BoogieIcfgContainer [2025-03-16 14:04:00,571 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-16 14:04:00,572 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-16 14:04:00,572 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-16 14:04:00,572 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-16 14:04:00,573 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:50" (3/4) ... [2025-03-16 14:04:00,574 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-16 14:04:00,578 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure base2flt [2025-03-16 14:04:00,578 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-03-16 14:04:00,582 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2025-03-16 14:04:00,583 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2025-03-16 14:04:00,585 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-16 14:04:00,585 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-16 14:04:00,603 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((e == \old(e)) && (m <= 33554431)) && ((m == 1) || (m == \old(m)))) || (((((e <= \old(e)) && ((m % 2) == 0)) && ((m / 2) <= 4294967295)) && (0 <= (m / 2))) && (m <= 33554431))) && (0 < \old(m))) [2025-03-16 14:04:00,603 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((0 == 0) && (\old(e) <= e)) && (16777216 <= m)) && (\old(m) != 1)) || (((e == \old(e)) && (m == \old(m))) && (16777216 <= m))) && (0 < \old(m))) [2025-03-16 14:04:00,623 WARN L140 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((0 == 0) && (\old(e) <= e)) && (16777216 <= m)) && (\old(m) != 1)) || (((e == \old(e)) && (m == \old(m))) && (16777216 <= m))) && (0 < \old(m))) [2025-03-16 14:04:00,624 WARN L140 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((e == \old(e)) && (m <= 33554431)) && ((m == 1) || (m == \old(m)))) || (((((e <= \old(e)) && ((m % 2) == 0)) && ((m / 2) <= 4294967295)) && (0 <= (m / 2))) && (m <= 33554431))) && (0 < \old(m))) [2025-03-16 14:04:00,650 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-16 14:04:00,651 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-16 14:04:00,651 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-16 14:04:00,652 INFO L158 Benchmark]: Toolchain (without parser) took 11196.63ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 130.0MB in the beginning and 77.9MB in the end (delta: 52.0MB). Peak memory consumption was 82.5MB. Max. memory is 16.1GB. [2025-03-16 14:04:00,652 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 125.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:04:00,653 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.84ms. Allocated memory is still 167.8MB. Free memory was 130.0MB in the beginning and 116.6MB in the end (delta: 13.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 14:04:00,653 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.23ms. Allocated memory is still 167.8MB. Free memory was 116.6MB in the beginning and 114.9MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 14:04:00,653 INFO L158 Benchmark]: Boogie Preprocessor took 21.60ms. Allocated memory is still 167.8MB. Free memory was 114.9MB in the beginning and 113.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:04:00,653 INFO L158 Benchmark]: IcfgBuilder took 347.06ms. Allocated memory is still 167.8MB. Free memory was 113.2MB in the beginning and 91.4MB in the end (delta: 21.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-16 14:04:00,655 INFO L158 Benchmark]: TraceAbstraction took 10543.36ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 90.6MB in the beginning and 86.1MB in the end (delta: 4.5MB). Peak memory consumption was 66.1MB. Max. memory is 16.1GB. [2025-03-16 14:04:00,655 INFO L158 Benchmark]: Witness Printer took 78.92ms. Allocated memory is still 201.3MB. Free memory was 86.1MB in the beginning and 77.9MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 14:04:00,656 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 125.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.84ms. Allocated memory is still 167.8MB. Free memory was 130.0MB in the beginning and 116.6MB in the end (delta: 13.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.23ms. Allocated memory is still 167.8MB. Free memory was 116.6MB in the beginning and 114.9MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.60ms. Allocated memory is still 167.8MB. Free memory was 114.9MB in the beginning and 113.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 347.06ms. Allocated memory is still 167.8MB. Free memory was 113.2MB in the beginning and 91.4MB in the end (delta: 21.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 10543.36ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 90.6MB in the beginning and 86.1MB in the end (delta: 4.5MB). Peak memory consumption was 66.1MB. Max. memory is 16.1GB. * Witness Printer took 78.92ms. Allocated memory is still 201.3MB. Free memory was 86.1MB in the beginning and 77.9MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 70 locations, 110 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.0s, OverallIterations: 21, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 790 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 789 mSDsluCounter, 7471 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5866 mSDsCounter, 75 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2466 IncrementalHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 75 mSolverCounterUnsat, 1605 mSDtfsCounter, 2466 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1416 GetRequests, 1240 SyntacticMatches, 3 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=20, InterpolantAutomatonStates: 161, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 286 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 1939 NumberOfCodeBlocks, 1906 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2367 ConstructedInterpolants, 0 QuantifiedInterpolants, 4077 SizeOfPredicates, 8 NumberOfNonLiveVariables, 2636 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 44 InterpolantComputations, 14 PerfectInterpolantSequences, 1222/1488 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Location Invariant Derived location invariant: (((((e == \old(e)) && (m <= 33554431)) && ((m == 1) || (m == \old(m)))) || (((((e <= \old(e)) && ((m % 2) == 0)) && ((m / 2) <= 4294967295)) && (0 <= (m / 2))) && (m <= 33554431))) && (0 < \old(m))) - InvariantResult [Line: 57]: Location Invariant Derived location invariant: ((((((0 == 0) && (\old(e) <= e)) && (16777216 <= m)) && (\old(m) != 1)) || (((e == \old(e)) && (m == \old(m))) && (16777216 <= m))) && (0 < \old(m))) RESULT: Ultimate proved your program to be correct! [2025-03-16 14:04:00,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE