./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de42.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 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 17:54:21,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 17:54:21,630 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 17:54:21,634 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 17:54:21,637 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 17:54:21,654 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 17:54:21,654 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 17:54:21,655 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 17:54:21,655 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 17:54:21,655 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 17:54:21,656 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 17:54:21,656 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 17:54:21,656 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 17:54:21,656 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 17:54:21,657 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 17:54:21,657 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 17:54:21,657 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 17:54:21,657 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 17:54:21,657 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 17:54:21,657 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 17:54:21,657 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 17:54:21,657 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 17:54:21,657 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 17:54:21,658 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 17:54:21,658 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 17:54:21,658 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 17:54:21,658 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 17:54:21,658 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 17:54:21,658 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 17:54:21,658 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 17:54:21,658 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 17:54:21,658 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 17:54:21,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:54:21,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 17:54:21,659 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 17:54:21,659 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 17:54:21,659 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 17:54:21,659 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 17:54:21,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 17:54:21,659 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 17:54:21,659 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 17:54:21,659 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 17:54:21,659 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 17:54:21,659 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 -> 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 [2025-03-16 17:54:21,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 17:54:21,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 17:54:21,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 17:54:21,881 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 17:54:21,881 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 17:54:21,882 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de42.c [2025-03-16 17:54:23,085 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/646e46466/eaeadf72039f4a8486025502efca3b6e/FLAGcdadcfa9d [2025-03-16 17:54:23,299 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 17:54:23,299 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de42.c [2025-03-16 17:54:23,304 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/646e46466/eaeadf72039f4a8486025502efca3b6e/FLAGcdadcfa9d [2025-03-16 17:54:23,314 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/646e46466/eaeadf72039f4a8486025502efca3b6e [2025-03-16 17:54:23,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 17:54:23,317 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 17:54:23,318 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 17:54:23,318 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 17:54:23,321 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 17:54:23,321 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a9577a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23, skipping insertion in model container [2025-03-16 17:54:23,322 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,333 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 17:54:23,430 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2025-03-16 17:54:23,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:54:23,450 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 17:54:23,458 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2025-03-16 17:54:23,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:54:23,473 INFO L204 MainTranslator]: Completed translation [2025-03-16 17:54:23,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23 WrapperNode [2025-03-16 17:54:23,475 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 17:54:23,476 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 17:54:23,476 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 17:54:23,476 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 17:54:23,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,484 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,500 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2025-03-16 17:54:23,500 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 17:54:23,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 17:54:23,501 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 17:54:23,501 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 17:54:23,505 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,506 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,514 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-16 17:54:23,515 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,519 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,520 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,520 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,521 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,522 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 17:54:23,526 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 17:54:23,526 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 17:54:23,526 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 17:54:23,527 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (1/1) ... [2025-03-16 17:54:23,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:54:23,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:23,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 17:54:23,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 17:54:23,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 17:54:23,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 17:54:23,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 17:54:23,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 17:54:23,614 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 17:54:23,615 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 17:54:23,702 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-16 17:54:23,704 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 17:54:23,709 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 17:54:23,709 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 17:54:23,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:54:23 BoogieIcfgContainer [2025-03-16 17:54:23,710 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 17:54:23,712 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 17:54:23,712 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 17:54:23,714 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 17:54:23,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 05:54:23" (1/3) ... [2025-03-16 17:54:23,715 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73fc09a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:54:23, skipping insertion in model container [2025-03-16 17:54:23,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:23" (2/3) ... [2025-03-16 17:54:23,715 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73fc09a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:54:23, skipping insertion in model container [2025-03-16 17:54:23,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:54:23" (3/3) ... [2025-03-16 17:54:23,716 INFO L128 eAbstractionObserver]: Analyzing ICFG in-de42.c [2025-03-16 17:54:23,725 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 17:54:23,726 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG in-de42.c that has 1 procedures, 11 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-16 17:54:23,756 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 17:54:23,763 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;@1b0e1f75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 17:54:23,764 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 17:54:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-16 17:54:23,770 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:23,770 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:23,771 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:23,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:23,774 INFO L85 PathProgramCache]: Analyzing trace with hash 719855399, now seen corresponding path program 1 times [2025-03-16 17:54:23,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:23,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797973958] [2025-03-16 17:54:23,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:23,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:23,826 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 17:54:23,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 17:54:23,863 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:23,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:24,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:24,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797973958] [2025-03-16 17:54:24,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797973958] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:54:24,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:54:24,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 17:54:24,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655911940] [2025-03-16 17:54:24,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:54:24,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 17:54:24,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:24,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 17:54:24,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 17:54:24,229 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:24,318 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2025-03-16 17:54:24,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 17:54:24,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-16 17:54:24,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:24,325 INFO L225 Difference]: With dead ends: 26 [2025-03-16 17:54:24,325 INFO L226 Difference]: Without dead ends: 17 [2025-03-16 17:54:24,327 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-16 17:54:24,329 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:24,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:54:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-03-16 17:54:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2025-03-16 17:54:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2025-03-16 17:54:24,351 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 18 transitions. Word has length 7 [2025-03-16 17:54:24,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:24,352 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 18 transitions. [2025-03-16 17:54:24,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:24,352 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 18 transitions. [2025-03-16 17:54:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-16 17:54:24,353 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:24,353 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:24,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 17:54:24,353 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:24,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:24,355 INFO L85 PathProgramCache]: Analyzing trace with hash 813990108, now seen corresponding path program 1 times [2025-03-16 17:54:24,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:24,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783089032] [2025-03-16 17:54:24,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:24,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:24,362 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 17:54:24,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 17:54:24,372 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:24,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:24,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:24,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783089032] [2025-03-16 17:54:24,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783089032] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:54:24,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:54:24,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 17:54:24,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476050123] [2025-03-16 17:54:24,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:54:24,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 17:54:24,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:24,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 17:54:24,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 17:54:24,434 INFO L87 Difference]: Start difference. First operand 12 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:24,467 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2025-03-16 17:54:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 17:54:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-16 17:54:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:24,469 INFO L225 Difference]: With dead ends: 18 [2025-03-16 17:54:24,469 INFO L226 Difference]: Without dead ends: 12 [2025-03-16 17:54:24,469 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-16 17:54:24,469 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:24,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:24,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2025-03-16 17:54:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2025-03-16 17:54:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2025-03-16 17:54:24,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2025-03-16 17:54:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:24,473 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2025-03-16 17:54:24,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:24,473 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2025-03-16 17:54:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-16 17:54:24,473 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:24,473 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:24,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 17:54:24,473 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:24,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:24,474 INFO L85 PathProgramCache]: Analyzing trace with hash 840712635, now seen corresponding path program 1 times [2025-03-16 17:54:24,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:24,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356422017] [2025-03-16 17:54:24,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:24,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:24,479 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 17:54:24,484 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 17:54:24,484 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:24,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:24,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:24,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356422017] [2025-03-16 17:54:24,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356422017] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:54:24,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:54:24,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 17:54:24,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127672400] [2025-03-16 17:54:24,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:54:24,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 17:54:24,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:24,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 17:54:24,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 17:54:24,507 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:24,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:24,522 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2025-03-16 17:54:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 17:54:24,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-16 17:54:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:24,523 INFO L225 Difference]: With dead ends: 19 [2025-03-16 17:54:24,523 INFO L226 Difference]: Without dead ends: 12 [2025-03-16 17:54:24,524 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 17:54:24,525 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:24,525 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 14 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2025-03-16 17:54:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2025-03-16 17:54:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2025-03-16 17:54:24,529 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 8 [2025-03-16 17:54:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:24,529 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2025-03-16 17:54:24,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2025-03-16 17:54:24,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-16 17:54:24,530 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:24,530 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:24,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 17:54:24,530 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:24,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:24,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1758752091, now seen corresponding path program 1 times [2025-03-16 17:54:24,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:24,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557655729] [2025-03-16 17:54:24,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:24,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:24,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 17:54:24,542 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 17:54:24,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:24,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:24,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:24,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557655729] [2025-03-16 17:54:24,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557655729] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:24,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370316661] [2025-03-16 17:54:24,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:24,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:24,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:24,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:24,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 17:54:24,651 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 17:54:24,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 17:54:24,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:24,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:24,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 17:54:24,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:24,682 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:24,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370316661] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:24,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:24,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-03-16 17:54:24,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085484201] [2025-03-16 17:54:24,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:24,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 17:54:24,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:24,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 17:54:24,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-16 17:54:24,720 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:24,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:24,812 INFO L93 Difference]: Finished difference Result 34 states and 56 transitions. [2025-03-16 17:54:24,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 17:54:24,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-16 17:54:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:24,813 INFO L225 Difference]: With dead ends: 34 [2025-03-16 17:54:24,813 INFO L226 Difference]: Without dead ends: 27 [2025-03-16 17:54:24,813 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-03-16 17:54:24,814 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:24,814 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 31 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-16 17:54:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2025-03-16 17:54:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:24,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2025-03-16 17:54:24,818 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2025-03-16 17:54:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:24,818 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2025-03-16 17:54:24,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2025-03-16 17:54:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-16 17:54:24,818 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:24,818 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:24,825 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 17:54:25,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:25,023 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:25,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1410365719, now seen corresponding path program 1 times [2025-03-16 17:54:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:25,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665326555] [2025-03-16 17:54:25,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:25,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:25,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-16 17:54:25,032 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 17:54:25,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:25,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 17:54:25,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:25,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665326555] [2025-03-16 17:54:25,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665326555] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:25,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109813979] [2025-03-16 17:54:25,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:25,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:25,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:25,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:25,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 17:54:25,114 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-16 17:54:25,122 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 17:54:25,122 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:25,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:25,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 17:54:25,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:54:25,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:54:25,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109813979] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:25,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:25,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-03-16 17:54:25,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669997192] [2025-03-16 17:54:25,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:25,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 17:54:25,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:25,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 17:54:25,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-16 17:54:25,175 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:25,227 INFO L93 Difference]: Finished difference Result 52 states and 79 transitions. [2025-03-16 17:54:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 17:54:25,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-16 17:54:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:25,228 INFO L225 Difference]: With dead ends: 52 [2025-03-16 17:54:25,228 INFO L226 Difference]: Without dead ends: 48 [2025-03-16 17:54:25,228 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-16 17:54:25,229 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:25,229 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 33 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-16 17:54:25,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2025-03-16 17:54:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 62 transitions. [2025-03-16 17:54:25,236 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 62 transitions. Word has length 10 [2025-03-16 17:54:25,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:25,236 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 62 transitions. [2025-03-16 17:54:25,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:25,236 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 62 transitions. [2025-03-16 17:54:25,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-16 17:54:25,237 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:25,237 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:25,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:25,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:25,441 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:25,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:25,441 INFO L85 PathProgramCache]: Analyzing trace with hash 771696075, now seen corresponding path program 1 times [2025-03-16 17:54:25,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:25,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537473065] [2025-03-16 17:54:25,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:25,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:25,447 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 17:54:25,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 17:54:25,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:25,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:25,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:25,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537473065] [2025-03-16 17:54:25,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537473065] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:25,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959598852] [2025-03-16 17:54:25,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:25,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:25,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:25,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:25,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 17:54:25,725 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 17:54:25,735 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 17:54:25,735 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:25,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:25,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 17:54:25,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:25,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:26,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959598852] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:26,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:26,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2025-03-16 17:54:26,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411932531] [2025-03-16 17:54:26,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:26,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 17:54:26,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:26,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 17:54:26,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2025-03-16 17:54:26,152 INFO L87 Difference]: Start difference. First operand 41 states and 62 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:26,453 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2025-03-16 17:54:26,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 17:54:26,454 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-16 17:54:26,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:26,454 INFO L225 Difference]: With dead ends: 50 [2025-03-16 17:54:26,455 INFO L226 Difference]: Without dead ends: 31 [2025-03-16 17:54:26,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2025-03-16 17:54:26,456 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:26,456 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 65 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:54:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-16 17:54:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2025-03-16 17:54:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 46 transitions. [2025-03-16 17:54:26,465 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 46 transitions. Word has length 11 [2025-03-16 17:54:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:26,465 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 46 transitions. [2025-03-16 17:54:26,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:26,465 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 46 transitions. [2025-03-16 17:54:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-16 17:54:26,466 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:26,466 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:26,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 17:54:26,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:26,670 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:26,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1789135911, now seen corresponding path program 2 times [2025-03-16 17:54:26,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:26,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962488445] [2025-03-16 17:54:26,670 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:26,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:26,675 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-03-16 17:54:26,681 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 17:54:26,682 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:26,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:26,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:26,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962488445] [2025-03-16 17:54:26,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962488445] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:26,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847618723] [2025-03-16 17:54:26,779 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:26,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:26,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:26,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:26,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 17:54:26,801 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-03-16 17:54:26,810 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 17:54:26,810 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:26,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:26,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 17:54:26,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:26,829 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:26,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847618723] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:26,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:26,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-16 17:54:26,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682690252] [2025-03-16 17:54:26,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:26,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 17:54:26,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:26,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 17:54:26,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-16 17:54:26,905 INFO L87 Difference]: Start difference. First operand 30 states and 46 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:27,365 INFO L93 Difference]: Finished difference Result 129 states and 233 transitions. [2025-03-16 17:54:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-16 17:54:27,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-16 17:54:27,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:27,367 INFO L225 Difference]: With dead ends: 129 [2025-03-16 17:54:27,367 INFO L226 Difference]: Without dead ends: 118 [2025-03-16 17:54:27,367 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2025-03-16 17:54:27,367 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 101 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:27,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 54 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:54:27,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-16 17:54:27,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2025-03-16 17:54:27,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.53125) internal successors, (98), 64 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 98 transitions. [2025-03-16 17:54:27,387 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 98 transitions. Word has length 11 [2025-03-16 17:54:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:27,387 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 98 transitions. [2025-03-16 17:54:27,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:27,388 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 98 transitions. [2025-03-16 17:54:27,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-16 17:54:27,389 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:27,389 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:27,395 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 17:54:27,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:27,593 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:27,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:27,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1734485946, now seen corresponding path program 2 times [2025-03-16 17:54:27,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:27,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307026788] [2025-03-16 17:54:27,594 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:27,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:27,597 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-16 17:54:27,602 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 17:54:27,602 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:27,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 17:54:27,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:27,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307026788] [2025-03-16 17:54:27,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307026788] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:27,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766868014] [2025-03-16 17:54:27,699 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:27,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:27,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:27,704 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:27,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 17:54:27,738 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-16 17:54:27,751 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 17:54:27,751 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:27,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:27,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 17:54:27,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 17:54:27,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 17:54:27,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766868014] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:27,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:27,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-16 17:54:27,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81323351] [2025-03-16 17:54:27,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:27,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 17:54:27,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:27,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 17:54:27,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-16 17:54:27,830 INFO L87 Difference]: Start difference. First operand 65 states and 98 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:27,935 INFO L93 Difference]: Finished difference Result 92 states and 131 transitions. [2025-03-16 17:54:27,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 17:54:27,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-16 17:54:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:27,936 INFO L225 Difference]: With dead ends: 92 [2025-03-16 17:54:27,936 INFO L226 Difference]: Without dead ends: 76 [2025-03-16 17:54:27,936 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-03-16 17:54:27,937 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:27,937 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:54:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-16 17:54:27,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2025-03-16 17:54:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 90 transitions. [2025-03-16 17:54:27,947 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 90 transitions. Word has length 13 [2025-03-16 17:54:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:27,947 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 90 transitions. [2025-03-16 17:54:27,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 90 transitions. [2025-03-16 17:54:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-16 17:54:27,948 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:27,948 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:27,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:28,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:28,150 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:28,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:28,151 INFO L85 PathProgramCache]: Analyzing trace with hash 484711035, now seen corresponding path program 3 times [2025-03-16 17:54:28,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:28,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943963252] [2025-03-16 17:54:28,151 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:54:28,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:28,156 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-16 17:54:28,162 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 17:54:28,162 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 17:54:28,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 17:54:28,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:28,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943963252] [2025-03-16 17:54:28,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943963252] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:28,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756638467] [2025-03-16 17:54:28,219 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:54:28,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:28,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:28,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 17:54:28,241 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-16 17:54:28,249 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 17:54:28,249 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 17:54:28,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:28,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 17:54:28,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 17:54:28,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 17:54:28,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756638467] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:28,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:28,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2025-03-16 17:54:28,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993563102] [2025-03-16 17:54:28,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:28,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 17:54:28,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:28,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 17:54:28,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:54:28,327 INFO L87 Difference]: Start difference. First operand 61 states and 90 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:28,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:28,408 INFO L93 Difference]: Finished difference Result 103 states and 151 transitions. [2025-03-16 17:54:28,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 17:54:28,408 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-16 17:54:28,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:28,409 INFO L225 Difference]: With dead ends: 103 [2025-03-16 17:54:28,409 INFO L226 Difference]: Without dead ends: 99 [2025-03-16 17:54:28,409 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2025-03-16 17:54:28,409 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:28,409 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 54 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-16 17:54:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2025-03-16 17:54:28,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.4942528735632183) internal successors, (130), 87 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 130 transitions. [2025-03-16 17:54:28,433 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 130 transitions. Word has length 14 [2025-03-16 17:54:28,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:28,434 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 130 transitions. [2025-03-16 17:54:28,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 130 transitions. [2025-03-16 17:54:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-16 17:54:28,434 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:28,434 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:28,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 17:54:28,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:28,639 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:28,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:28,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2141171943, now seen corresponding path program 4 times [2025-03-16 17:54:28,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:28,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708624305] [2025-03-16 17:54:28,639 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:54:28,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:28,642 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-16 17:54:28,655 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 17:54:28,656 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:54:28,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:28,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:28,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708624305] [2025-03-16 17:54:28,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708624305] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:28,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554206436] [2025-03-16 17:54:28,946 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:54:28,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:28,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:28,948 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:28,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 17:54:28,970 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-16 17:54:28,996 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 17:54:28,996 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:54:28,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:28,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-16 17:54:28,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:29,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:29,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554206436] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:29,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:29,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2025-03-16 17:54:29,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126973654] [2025-03-16 17:54:29,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:29,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 17:54:29,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:29,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 17:54:29,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2025-03-16 17:54:29,523 INFO L87 Difference]: Start difference. First operand 88 states and 130 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:29,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:29,855 INFO L93 Difference]: Finished difference Result 113 states and 157 transitions. [2025-03-16 17:54:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 17:54:29,856 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-16 17:54:29,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:29,856 INFO L225 Difference]: With dead ends: 113 [2025-03-16 17:54:29,856 INFO L226 Difference]: Without dead ends: 83 [2025-03-16 17:54:29,857 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2025-03-16 17:54:29,857 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:29,857 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 46 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:54:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-16 17:54:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2025-03-16 17:54:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.475) internal successors, (118), 80 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 118 transitions. [2025-03-16 17:54:29,870 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 118 transitions. Word has length 15 [2025-03-16 17:54:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:29,871 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 118 transitions. [2025-03-16 17:54:29,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 118 transitions. [2025-03-16 17:54:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-16 17:54:29,871 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:29,871 INFO L218 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:29,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:30,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:30,072 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:30,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:30,072 INFO L85 PathProgramCache]: Analyzing trace with hash 603755211, now seen corresponding path program 5 times [2025-03-16 17:54:30,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:30,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130291404] [2025-03-16 17:54:30,072 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:54:30,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:30,078 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 4 equivalence classes. [2025-03-16 17:54:30,082 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 17:54:30,082 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 17:54:30,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:54:30,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:30,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130291404] [2025-03-16 17:54:30,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130291404] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:30,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146258999] [2025-03-16 17:54:30,163 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:54:30,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:30,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:30,167 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:30,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 17:54:30,194 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 4 equivalence classes. [2025-03-16 17:54:30,203 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 17:54:30,204 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 17:54:30,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:30,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-16 17:54:30,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:54:30,224 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:54:30,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146258999] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:30,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:30,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2025-03-16 17:54:30,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594036742] [2025-03-16 17:54:30,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:30,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-16 17:54:30,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:30,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-16 17:54:30,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2025-03-16 17:54:30,330 INFO L87 Difference]: Start difference. First operand 81 states and 118 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:31,478 INFO L93 Difference]: Finished difference Result 232 states and 378 transitions. [2025-03-16 17:54:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-16 17:54:31,478 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-16 17:54:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:31,479 INFO L225 Difference]: With dead ends: 232 [2025-03-16 17:54:31,479 INFO L226 Difference]: Without dead ends: 208 [2025-03-16 17:54:31,480 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=963, Invalid=2577, Unknown=0, NotChecked=0, Total=3540 [2025-03-16 17:54:31,481 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 127 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:31,481 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 77 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:54:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2025-03-16 17:54:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 109. [2025-03-16 17:54:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 108 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 160 transitions. [2025-03-16 17:54:31,507 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 160 transitions. Word has length 15 [2025-03-16 17:54:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:31,507 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 160 transitions. [2025-03-16 17:54:31,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 160 transitions. [2025-03-16 17:54:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 17:54:31,510 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:31,510 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:31,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:31,711 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,SelfDestructingSolverStorable10 [2025-03-16 17:54:31,711 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:31,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash -305083836, now seen corresponding path program 6 times [2025-03-16 17:54:31,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:31,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639682566] [2025-03-16 17:54:31,712 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:54:31,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:31,715 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 3 equivalence classes. [2025-03-16 17:54:31,721 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 17:54:31,721 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-16 17:54:31,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 17:54:31,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:31,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639682566] [2025-03-16 17:54:31,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639682566] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:31,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200173513] [2025-03-16 17:54:31,792 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:54:31,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:31,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:31,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:31,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 17:54:31,816 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 3 equivalence classes. [2025-03-16 17:54:31,825 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 17:54:31,825 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-16 17:54:31,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:31,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-16 17:54:31,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 17:54:31,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 17:54:31,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200173513] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:31,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:31,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2025-03-16 17:54:31,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119227083] [2025-03-16 17:54:31,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:31,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-16 17:54:31,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:31,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-16 17:54:31,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2025-03-16 17:54:31,961 INFO L87 Difference]: Start difference. First operand 109 states and 160 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:32,280 INFO L93 Difference]: Finished difference Result 153 states and 215 transitions. [2025-03-16 17:54:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-16 17:54:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-16 17:54:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:32,281 INFO L225 Difference]: With dead ends: 153 [2025-03-16 17:54:32,282 INFO L226 Difference]: Without dead ends: 128 [2025-03-16 17:54:32,282 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2025-03-16 17:54:32,282 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:32,282 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 32 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:54:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-16 17:54:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2025-03-16 17:54:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.4455445544554455) internal successors, (146), 101 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 146 transitions. [2025-03-16 17:54:32,300 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 146 transitions. Word has length 17 [2025-03-16 17:54:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:32,300 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 146 transitions. [2025-03-16 17:54:32,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 146 transitions. [2025-03-16 17:54:32,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 17:54:32,301 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:32,301 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:32,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:32,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:32,506 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:32,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:32,506 INFO L85 PathProgramCache]: Analyzing trace with hash -490467113, now seen corresponding path program 7 times [2025-03-16 17:54:32,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:32,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549744727] [2025-03-16 17:54:32,506 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:54:32,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:32,509 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 17:54:32,514 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 17:54:32,515 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:32,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 17:54:32,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:32,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549744727] [2025-03-16 17:54:32,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549744727] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:32,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234479949] [2025-03-16 17:54:32,576 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:54:32,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:32,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:32,578 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:32,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 17:54:32,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 17:54:32,605 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 17:54:32,606 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:32,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:32,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 17:54:32,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 17:54:32,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 17:54:32,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234479949] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:32,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:32,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2025-03-16 17:54:32,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118181513] [2025-03-16 17:54:32,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:32,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 17:54:32,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:32,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 17:54:32,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 17:54:32,688 INFO L87 Difference]: Start difference. First operand 102 states and 146 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:32,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:32,752 INFO L93 Difference]: Finished difference Result 121 states and 168 transitions. [2025-03-16 17:54:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 17:54:32,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-03-16 17:54:32,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:32,753 INFO L225 Difference]: With dead ends: 121 [2025-03-16 17:54:32,753 INFO L226 Difference]: Without dead ends: 118 [2025-03-16 17:54:32,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-16 17:54:32,754 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:32,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 51 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-16 17:54:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2025-03-16 17:54:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.4234234234234233) internal successors, (158), 111 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 158 transitions. [2025-03-16 17:54:32,775 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 158 transitions. Word has length 18 [2025-03-16 17:54:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:32,775 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 158 transitions. [2025-03-16 17:54:32,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 158 transitions. [2025-03-16 17:54:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 17:54:32,776 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:32,776 INFO L218 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:32,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 17:54:32,980 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 17:54:32,980 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:32,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:32,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1226038491, now seen corresponding path program 3 times [2025-03-16 17:54:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:32,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915105015] [2025-03-16 17:54:32,980 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:54:32,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:32,983 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 7 equivalence classes. [2025-03-16 17:54:32,998 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 17:54:32,998 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 17:54:32,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:33,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:33,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915105015] [2025-03-16 17:54:33,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915105015] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:33,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592439603] [2025-03-16 17:54:33,157 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:54:33,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:33,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:33,159 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:33,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 17:54:33,179 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 7 equivalence classes. [2025-03-16 17:54:33,193 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 17:54:33,193 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 17:54:33,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:33,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-16 17:54:33,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:33,218 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:33,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592439603] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:33,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:33,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2025-03-16 17:54:33,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035813940] [2025-03-16 17:54:33,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:33,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-16 17:54:33,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:33,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-16 17:54:33,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2025-03-16 17:54:33,420 INFO L87 Difference]: Start difference. First operand 112 states and 158 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:36,104 INFO L93 Difference]: Finished difference Result 491 states and 790 transitions. [2025-03-16 17:54:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2025-03-16 17:54:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-03-16 17:54:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:36,106 INFO L225 Difference]: With dead ends: 491 [2025-03-16 17:54:36,106 INFO L226 Difference]: Without dead ends: 457 [2025-03-16 17:54:36,107 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1576, Invalid=3536, Unknown=0, NotChecked=0, Total=5112 [2025-03-16 17:54:36,107 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 649 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:36,107 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 182 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 17:54:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2025-03-16 17:54:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 176. [2025-03-16 17:54:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.4228571428571428) internal successors, (249), 175 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 249 transitions. [2025-03-16 17:54:36,158 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 249 transitions. Word has length 18 [2025-03-16 17:54:36,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:36,158 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 249 transitions. [2025-03-16 17:54:36,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:36,159 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 249 transitions. [2025-03-16 17:54:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 17:54:36,159 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:36,159 INFO L218 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:36,165 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 17:54:36,359 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,SelfDestructingSolverStorable13 [2025-03-16 17:54:36,359 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:36,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash -159991868, now seen corresponding path program 2 times [2025-03-16 17:54:36,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:36,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318228258] [2025-03-16 17:54:36,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:36,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:36,362 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 17:54:36,368 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 17:54:36,368 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:36,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 17:54:36,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318228258] [2025-03-16 17:54:36,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318228258] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305144009] [2025-03-16 17:54:36,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:36,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:36,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:36,460 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:36,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 17:54:36,482 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 17:54:36,490 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 17:54:36,490 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:36,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:36,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 17:54:36,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 17:54:36,531 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 17:54:36,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305144009] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:36,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:36,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-16 17:54:36,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834301346] [2025-03-16 17:54:36,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:36,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 17:54:36,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:36,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 17:54:36,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2025-03-16 17:54:36,619 INFO L87 Difference]: Start difference. First operand 176 states and 249 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:37,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:37,497 INFO L93 Difference]: Finished difference Result 409 states and 604 transitions. [2025-03-16 17:54:37,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-16 17:54:37,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-16 17:54:37,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:37,499 INFO L225 Difference]: With dead ends: 409 [2025-03-16 17:54:37,500 INFO L226 Difference]: Without dead ends: 405 [2025-03-16 17:54:37,500 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 17:54:37,501 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 124 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:37,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 187 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 17:54:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2025-03-16 17:54:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 294. [2025-03-16 17:54:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.5563139931740615) internal successors, (456), 293 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 456 transitions. [2025-03-16 17:54:37,581 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 456 transitions. Word has length 19 [2025-03-16 17:54:37,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:37,582 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 456 transitions. [2025-03-16 17:54:37,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:37,582 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 456 transitions. [2025-03-16 17:54:37,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 17:54:37,582 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:37,582 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:37,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-16 17:54:37,782 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,SelfDestructingSolverStorable14 [2025-03-16 17:54:37,783 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:37,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1975420427, now seen corresponding path program 8 times [2025-03-16 17:54:37,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:37,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343751952] [2025-03-16 17:54:37,783 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:37,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:37,785 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 17:54:37,797 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 17:54:37,797 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:37,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:38,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:38,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343751952] [2025-03-16 17:54:38,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343751952] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:38,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688606371] [2025-03-16 17:54:38,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:38,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:38,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:38,249 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:38,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 17:54:38,270 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 17:54:38,293 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 17:54:38,293 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:38,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:38,294 WARN L254 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-16 17:54:38,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:38,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:44,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688606371] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:44,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:44,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2025-03-16 17:54:44,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8865183] [2025-03-16 17:54:44,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:44,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-16 17:54:44,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:44,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-16 17:54:44,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1843, Unknown=0, NotChecked=0, Total=1980 [2025-03-16 17:54:44,010 INFO L87 Difference]: Start difference. First operand 294 states and 456 transitions. Second operand has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:45,828 INFO L93 Difference]: Finished difference Result 334 states and 496 transitions. [2025-03-16 17:54:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-16 17:54:45,828 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-16 17:54:45,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:45,830 INFO L225 Difference]: With dead ends: 334 [2025-03-16 17:54:45,830 INFO L226 Difference]: Without dead ends: 285 [2025-03-16 17:54:45,831 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=391, Invalid=3269, Unknown=0, NotChecked=0, Total=3660 [2025-03-16 17:54:45,831 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:45,831 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 167 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 17:54:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2025-03-16 17:54:45,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 279. [2025-03-16 17:54:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.5467625899280575) internal successors, (430), 278 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 430 transitions. [2025-03-16 17:54:45,906 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 430 transitions. Word has length 19 [2025-03-16 17:54:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:45,906 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 430 transitions. [2025-03-16 17:54:45,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 430 transitions. [2025-03-16 17:54:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-16 17:54:45,907 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:45,907 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:45,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:46,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-16 17:54:46,107 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:46,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:46,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2047698758, now seen corresponding path program 9 times [2025-03-16 17:54:46,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:46,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651903947] [2025-03-16 17:54:46,108 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:54:46,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:46,110 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-03-16 17:54:46,117 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 17:54:46,117 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 17:54:46,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 17:54:46,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:46,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651903947] [2025-03-16 17:54:46,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651903947] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:46,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102570956] [2025-03-16 17:54:46,249 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:54:46,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:46,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:46,251 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:46,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 17:54:46,274 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-03-16 17:54:46,285 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 17:54:46,286 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 17:54:46,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:46,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 17:54:46,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 17:54:46,339 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 17:54:46,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102570956] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:46,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:46,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2025-03-16 17:54:46,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696611344] [2025-03-16 17:54:46,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:46,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-16 17:54:46,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:46,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-16 17:54:46,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-03-16 17:54:46,511 INFO L87 Difference]: Start difference. First operand 279 states and 430 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:46,952 INFO L93 Difference]: Finished difference Result 396 states and 559 transitions. [2025-03-16 17:54:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-16 17:54:46,952 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-03-16 17:54:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:46,953 INFO L225 Difference]: With dead ends: 396 [2025-03-16 17:54:46,953 INFO L226 Difference]: Without dead ends: 335 [2025-03-16 17:54:46,954 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2025-03-16 17:54:46,954 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:46,954 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:54:46,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2025-03-16 17:54:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 269. [2025-03-16 17:54:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.5261194029850746) internal successors, (409), 268 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 409 transitions. [2025-03-16 17:54:47,030 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 409 transitions. Word has length 21 [2025-03-16 17:54:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:47,030 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 409 transitions. [2025-03-16 17:54:47,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 409 transitions. [2025-03-16 17:54:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-16 17:54:47,031 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:47,031 INFO L218 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:47,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:47,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:47,232 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:47,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:47,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1343428225, now seen corresponding path program 10 times [2025-03-16 17:54:47,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:47,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178204250] [2025-03-16 17:54:47,232 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:54:47,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:47,234 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-16 17:54:47,239 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 17:54:47,239 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:54:47,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:54:47,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178204250] [2025-03-16 17:54:47,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178204250] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981028747] [2025-03-16 17:54:47,459 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:54:47,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:47,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:47,461 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:47,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 17:54:47,482 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-16 17:54:47,491 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 17:54:47,491 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:54:47,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:47,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-16 17:54:47,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:54:47,528 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:54:47,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981028747] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:47,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:47,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2025-03-16 17:54:47,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702133397] [2025-03-16 17:54:47,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:47,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-16 17:54:47,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:47,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-16 17:54:47,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 17:54:47,929 INFO L87 Difference]: Start difference. First operand 269 states and 409 transitions. Second operand has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:58,810 INFO L93 Difference]: Finished difference Result 843 states and 1355 transitions. [2025-03-16 17:54:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2025-03-16 17:54:58,810 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-03-16 17:54:58,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:58,813 INFO L225 Difference]: With dead ends: 843 [2025-03-16 17:54:58,813 INFO L226 Difference]: Without dead ends: 815 [2025-03-16 17:54:58,816 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6692 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=4904, Invalid=12918, Unknown=0, NotChecked=0, Total=17822 [2025-03-16 17:54:58,816 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 624 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:58,816 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 203 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-16 17:54:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2025-03-16 17:54:58,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 316. [2025-03-16 17:54:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.546031746031746) internal successors, (487), 315 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:58,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 487 transitions. [2025-03-16 17:54:58,932 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 487 transitions. Word has length 22 [2025-03-16 17:54:58,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:58,932 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 487 transitions. [2025-03-16 17:54:58,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:58,932 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 487 transitions. [2025-03-16 17:54:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 17:54:58,933 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:58,933 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:58,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-16 17:54:59,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-16 17:54:59,134 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:59,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:59,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1367958183, now seen corresponding path program 11 times [2025-03-16 17:54:59,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:59,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110101375] [2025-03-16 17:54:59,134 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:54:59,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:59,136 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 3 equivalence classes. [2025-03-16 17:54:59,152 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 17:54:59,152 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-16 17:54:59,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:59,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:59,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110101375] [2025-03-16 17:54:59,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110101375] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:59,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502159570] [2025-03-16 17:54:59,806 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:54:59,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:59,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:59,808 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:54:59,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 17:54:59,828 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 3 equivalence classes. [2025-03-16 17:54:59,876 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 17:54:59,876 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-16 17:54:59,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:59,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-16 17:54:59,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:55:00,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:55:01,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502159570] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:01,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:01,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 44 [2025-03-16 17:55:01,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553720814] [2025-03-16 17:55:01,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:01,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-16 17:55:01,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:01,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-16 17:55:01,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1877, Unknown=0, NotChecked=0, Total=1980 [2025-03-16 17:55:01,766 INFO L87 Difference]: Start difference. First operand 316 states and 487 transitions. Second operand has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:04,817 INFO L93 Difference]: Finished difference Result 344 states and 515 transitions. [2025-03-16 17:55:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-16 17:55:04,817 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 17:55:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:04,819 INFO L225 Difference]: With dead ends: 344 [2025-03-16 17:55:04,819 INFO L226 Difference]: Without dead ends: 302 [2025-03-16 17:55:04,819 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=252, Invalid=3288, Unknown=0, NotChecked=0, Total=3540 [2025-03-16 17:55:04,820 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:04,820 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 109 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 17:55:04,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2025-03-16 17:55:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2025-03-16 17:55:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.5433333333333332) internal successors, (463), 300 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 463 transitions. [2025-03-16 17:55:04,935 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 463 transitions. Word has length 23 [2025-03-16 17:55:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:04,935 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 463 transitions. [2025-03-16 17:55:04,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 463 transitions. [2025-03-16 17:55:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 17:55:04,935 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:04,935 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:04,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-16 17:55:05,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:05,137 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:05,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1396488516, now seen corresponding path program 12 times [2025-03-16 17:55:05,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:05,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105628469] [2025-03-16 17:55:05,137 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:55:05,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:05,140 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 4 equivalence classes. [2025-03-16 17:55:05,156 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 17:55:05,156 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-16 17:55:05,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-16 17:55:05,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:05,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105628469] [2025-03-16 17:55:05,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105628469] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:05,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940657837] [2025-03-16 17:55:05,325 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:55:05,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:05,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:05,326 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:05,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 17:55:05,348 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 4 equivalence classes. [2025-03-16 17:55:05,362 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 17:55:05,362 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-16 17:55:05,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:05,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-16 17:55:05,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-16 17:55:05,392 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-16 17:55:05,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940657837] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:05,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:05,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2025-03-16 17:55:05,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922199119] [2025-03-16 17:55:05,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:05,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 17:55:05,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:05,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 17:55:05,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2025-03-16 17:55:05,658 INFO L87 Difference]: Start difference. First operand 301 states and 463 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:09,720 INFO L93 Difference]: Finished difference Result 528 states and 714 transitions. [2025-03-16 17:55:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2025-03-16 17:55:09,720 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-03-16 17:55:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:09,722 INFO L225 Difference]: With dead ends: 528 [2025-03-16 17:55:09,722 INFO L226 Difference]: Without dead ends: 491 [2025-03-16 17:55:09,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1569, Invalid=7173, Unknown=0, NotChecked=0, Total=8742 [2025-03-16 17:55:09,726 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 231 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:09,726 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 61 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 17:55:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2025-03-16 17:55:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 301. [2025-03-16 17:55:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.5066666666666666) internal successors, (452), 300 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 452 transitions. [2025-03-16 17:55:09,851 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 452 transitions. Word has length 25 [2025-03-16 17:55:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:09,851 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 452 transitions. [2025-03-16 17:55:09,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:09,851 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 452 transitions. [2025-03-16 17:55:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 17:55:09,852 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:09,852 INFO L218 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:09,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-16 17:55:10,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:10,056 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:10,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:10,056 INFO L85 PathProgramCache]: Analyzing trace with hash 148667035, now seen corresponding path program 13 times [2025-03-16 17:55:10,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:10,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046108507] [2025-03-16 17:55:10,056 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:55:10,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:10,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-16 17:55:10,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 17:55:10,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:10,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 17:55:10,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:10,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046108507] [2025-03-16 17:55:10,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046108507] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:10,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506787309] [2025-03-16 17:55:10,319 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:55:10,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:10,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:10,320 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:10,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 17:55:10,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-16 17:55:10,355 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 17:55:10,355 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:55:10,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:10,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-16 17:55:10,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 17:55:10,400 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 17:55:10,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506787309] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:10,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:10,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2025-03-16 17:55:10,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947581586] [2025-03-16 17:55:10,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:10,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-16 17:55:10,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:10,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-16 17:55:10,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2025-03-16 17:55:10,906 INFO L87 Difference]: Start difference. First operand 301 states and 452 transitions. Second operand has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:31,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:31,630 INFO L93 Difference]: Finished difference Result 913 states and 1407 transitions. [2025-03-16 17:55:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2025-03-16 17:55:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-03-16 17:55:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:31,633 INFO L225 Difference]: With dead ends: 913 [2025-03-16 17:55:31,633 INFO L226 Difference]: Without dead ends: 868 [2025-03-16 17:55:31,635 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14225 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=8639, Invalid=27271, Unknown=0, NotChecked=0, Total=35910 [2025-03-16 17:55:31,636 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 1064 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:31,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1064 Valid, 208 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2025-03-16 17:55:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2025-03-16 17:55:31,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 338. [2025-03-16 17:55:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.545994065281899) internal successors, (521), 337 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 521 transitions. [2025-03-16 17:55:31,784 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 521 transitions. Word has length 26 [2025-03-16 17:55:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:31,784 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 521 transitions. [2025-03-16 17:55:31,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 521 transitions. [2025-03-16 17:55:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 17:55:31,784 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:31,784 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:31,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-16 17:55:31,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:31,985 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:31,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:31,985 INFO L85 PathProgramCache]: Analyzing trace with hash -683489717, now seen corresponding path program 14 times [2025-03-16 17:55:31,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:31,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208057181] [2025-03-16 17:55:31,985 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:55:31,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:31,988 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-16 17:55:32,011 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 17:55:32,011 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:55:32,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:55:33,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:33,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208057181] [2025-03-16 17:55:33,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208057181] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:33,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395759219] [2025-03-16 17:55:33,111 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:55:33,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:33,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:33,113 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:33,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 17:55:33,137 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-16 17:55:33,189 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 17:55:33,190 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:55:33,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:33,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-16 17:55:33,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:55:34,002 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:55:35,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395759219] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:35,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:35,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 19] total 56 [2025-03-16 17:55:35,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327865272] [2025-03-16 17:55:35,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:35,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-16 17:55:35,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:35,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-16 17:55:35,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3019, Unknown=0, NotChecked=0, Total=3192 [2025-03-16 17:55:35,391 INFO L87 Difference]: Start difference. First operand 338 states and 521 transitions. Second operand has 57 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 56 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:40,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:40,889 INFO L93 Difference]: Finished difference Result 370 states and 553 transitions. [2025-03-16 17:55:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-16 17:55:40,892 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 56 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-03-16 17:55:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:40,893 INFO L225 Difference]: With dead ends: 370 [2025-03-16 17:55:40,893 INFO L226 Difference]: Without dead ends: 324 [2025-03-16 17:55:40,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=259, Invalid=4031, Unknown=0, NotChecked=0, Total=4290 [2025-03-16 17:55:40,894 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:40,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 100 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-16 17:55:40,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2025-03-16 17:55:41,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2025-03-16 17:55:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.549689440993789) internal successors, (499), 322 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 499 transitions. [2025-03-16 17:55:41,044 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 499 transitions. Word has length 27 [2025-03-16 17:55:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:41,045 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 499 transitions. [2025-03-16 17:55:41,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 56 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 499 transitions. [2025-03-16 17:55:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-16 17:55:41,045 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:41,045 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:41,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-16 17:55:41,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:41,246 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:41,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1382275420, now seen corresponding path program 15 times [2025-03-16 17:55:41,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:41,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950401707] [2025-03-16 17:55:41,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:55:41,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:41,249 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-16 17:55:41,272 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 17:55:41,273 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 17:55:41,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 17:55:41,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:41,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950401707] [2025-03-16 17:55:41,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950401707] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:41,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42262240] [2025-03-16 17:55:41,514 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:55:41,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:41,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:41,516 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:41,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 17:55:41,539 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-03-16 17:55:41,616 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 17:55:41,616 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 17:55:41,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:41,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-16 17:55:41,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 17:55:41,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 17:55:42,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42262240] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:42,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:42,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 25 [2025-03-16 17:55:42,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536222830] [2025-03-16 17:55:42,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:42,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 17:55:42,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:42,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 17:55:42,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2025-03-16 17:55:42,350 INFO L87 Difference]: Start difference. First operand 323 states and 499 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:44,374 INFO L93 Difference]: Finished difference Result 406 states and 592 transitions. [2025-03-16 17:55:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-16 17:55:44,375 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-03-16 17:55:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:44,376 INFO L225 Difference]: With dead ends: 406 [2025-03-16 17:55:44,376 INFO L226 Difference]: Without dead ends: 365 [2025-03-16 17:55:44,377 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 35 SyntacticMatches, 14 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=409, Invalid=3373, Unknown=0, NotChecked=0, Total=3782 [2025-03-16 17:55:44,377 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:44,377 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 176 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 17:55:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2025-03-16 17:55:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 337. [2025-03-16 17:55:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.5089285714285714) internal successors, (507), 336 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 507 transitions. [2025-03-16 17:55:44,551 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 507 transitions. Word has length 28 [2025-03-16 17:55:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:44,551 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 507 transitions. [2025-03-16 17:55:44,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 507 transitions. [2025-03-16 17:55:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-16 17:55:44,551 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:44,551 INFO L218 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:55:44,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-16 17:55:44,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-16 17:55:44,752 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:44,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:44,752 INFO L85 PathProgramCache]: Analyzing trace with hash 458708415, now seen corresponding path program 16 times [2025-03-16 17:55:44,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:44,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672690715] [2025-03-16 17:55:44,752 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:55:44,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:44,755 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-16 17:55:44,760 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 17:55:44,760 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:55:44,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 17:55:45,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672690715] [2025-03-16 17:55:45,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672690715] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:45,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176053079] [2025-03-16 17:55:45,023 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:55:45,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:45,024 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:45,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 17:55:45,046 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-16 17:55:45,059 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 17:55:45,059 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:55:45,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:45,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-16 17:55:45,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 17:55:45,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:55:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 17:55:45,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176053079] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:55:45,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:55:45,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2025-03-16 17:55:45,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656114251] [2025-03-16 17:55:45,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:55:45,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-16 17:55:45,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:55:45,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-16 17:55:45,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2025-03-16 17:55:45,709 INFO L87 Difference]: Start difference. First operand 337 states and 507 transitions. Second operand has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 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)