./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono4_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.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/Mono4_1.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 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 06:48:52,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 06:48:52,248 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 06:48:52,252 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 06:48:52,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 06:48:52,278 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 06:48:52,280 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 06:48:52,280 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 06:48:52,281 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 06:48:52,284 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 06:48:52,285 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 06:48:52,285 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 06:48:52,285 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 06:48:52,286 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 06:48:52,286 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 06:48:52,286 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 06:48:52,287 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 06:48:52,287 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 06:48:52,287 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 06:48:52,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 06:48:52,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 06:48:52,289 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 06:48:52,289 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 06:48:52,289 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 06:48:52,289 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 06:48:52,290 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 06:48:52,290 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 06:48:52,290 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 06:48:52,290 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 06:48:52,290 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 06:48:52,291 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 06:48:52,291 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 06:48:52,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 06:48:52,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 06:48:52,292 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 06:48:52,292 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 06:48:52,292 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 06:48:52,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 06:48:52,293 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 06:48:52,293 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 06:48:52,293 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 06:48:52,294 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 06:48:52,294 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e [2024-11-16 06:48:52,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 06:48:52,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 06:48:52,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 06:48:52,576 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 06:48:52,576 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 06:48:52,577 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2024-11-16 06:48:53,885 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 06:48:54,029 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 06:48:54,029 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2024-11-16 06:48:54,035 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5562aec38/1f2240b1ccd94b93a1387295483c9e76/FLAGebd6c897b [2024-11-16 06:48:54,048 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5562aec38/1f2240b1ccd94b93a1387295483c9e76 [2024-11-16 06:48:54,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 06:48:54,051 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 06:48:54,052 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 06:48:54,052 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 06:48:54,058 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 06:48:54,059 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,060 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6adb09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54, skipping insertion in model container [2024-11-16 06:48:54,060 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,075 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 06:48:54,250 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/Mono4_1.c[311,324] [2024-11-16 06:48:54,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 06:48:54,275 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 06:48:54,284 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/Mono4_1.c[311,324] [2024-11-16 06:48:54,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 06:48:54,302 INFO L204 MainTranslator]: Completed translation [2024-11-16 06:48:54,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54 WrapperNode [2024-11-16 06:48:54,303 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 06:48:54,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 06:48:54,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 06:48:54,304 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 06:48:54,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,316 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,331 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2024-11-16 06:48:54,331 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 06:48:54,332 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 06:48:54,332 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 06:48:54,332 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 06:48:54,340 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,342 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,351 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]. [2024-11-16 06:48:54,351 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,351 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,353 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,353 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,354 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,354 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 06:48:54,356 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 06:48:54,356 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 06:48:54,356 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 06:48:54,357 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (1/1) ... [2024-11-16 06:48:54,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 06:48:54,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:48:54,389 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) [2024-11-16 06:48:54,392 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 [2024-11-16 06:48:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 06:48:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 06:48:54,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 06:48:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 06:48:54,490 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 06:48:54,494 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 06:48:54,594 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-16 06:48:54,595 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 06:48:54,605 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 06:48:54,606 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 06:48:54,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:48:54 BoogieIcfgContainer [2024-11-16 06:48:54,606 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 06:48:54,622 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 06:48:54,623 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 06:48:54,626 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 06:48:54,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 06:48:54" (1/3) ... [2024-11-16 06:48:54,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0c11a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 06:48:54, skipping insertion in model container [2024-11-16 06:48:54,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:48:54" (2/3) ... [2024-11-16 06:48:54,631 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0c11a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 06:48:54, skipping insertion in model container [2024-11-16 06:48:54,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:48:54" (3/3) ... [2024-11-16 06:48:54,633 INFO L112 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2024-11-16 06:48:54,660 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 06:48:54,661 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 06:48:54,705 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 06:48:54,710 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;@5c87e723, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 06:48:54,711 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 06:48:54,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 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) [2024-11-16 06:48:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-16 06:48:54,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:48:54,719 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:48:54,720 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:48:54,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:48:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash 122697996, now seen corresponding path program 1 times [2024-11-16 06:48:54,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:48:54,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009399590] [2024-11-16 06:48:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:48:54,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:48:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:48:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:48:54,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:48:54,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009399590] [2024-11-16 06:48:54,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009399590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:48:54,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:48:54,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 06:48:54,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397277208] [2024-11-16 06:48:54,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:48:54,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 06:48:54,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:48:54,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 06:48:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 06:48:54,890 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2024-11-16 06:48:54,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:48:54,899 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2024-11-16 06:48:54,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 06:48:54,901 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2024-11-16 06:48:54,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:48:54,907 INFO L225 Difference]: With dead ends: 24 [2024-11-16 06:48:54,907 INFO L226 Difference]: Without dead ends: 10 [2024-11-16 06:48:54,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 06:48:54,912 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:48:54,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:48:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-16 06:48:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-16 06:48:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2024-11-16 06:48:54,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2024-11-16 06:48:54,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:48:54,937 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2024-11-16 06:48:54,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2024-11-16 06:48:54,938 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2024-11-16 06:48:54,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-16 06:48:54,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:48:54,938 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:48:54,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 06:48:54,939 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:48:54,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:48:54,939 INFO L85 PathProgramCache]: Analyzing trace with hash -517127429, now seen corresponding path program 1 times [2024-11-16 06:48:54,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:48:54,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060178852] [2024-11-16 06:48:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:48:54,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:48:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:48:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:48:54,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:48:54,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060178852] [2024-11-16 06:48:54,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060178852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:48:54,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:48:54,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 06:48:54,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344523367] [2024-11-16 06:48:54,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:48:54,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 06:48:54,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:48:54,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 06:48:54,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 06:48:54,999 INFO L87 Difference]: Start difference. First operand 10 states and 11 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) [2024-11-16 06:48:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:48:55,017 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2024-11-16 06:48:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 06:48:55,018 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 [2024-11-16 06:48:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:48:55,018 INFO L225 Difference]: With dead ends: 21 [2024-11-16 06:48:55,018 INFO L226 Difference]: Without dead ends: 13 [2024-11-16 06:48:55,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 06:48:55,020 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:48:55,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 14 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:48:55,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-16 06:48:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-16 06:48:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2024-11-16 06:48:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-11-16 06:48:55,024 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2024-11-16 06:48:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:48:55,025 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-11-16 06:48:55,025 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) [2024-11-16 06:48:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-11-16 06:48:55,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 06:48:55,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:48:55,027 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:48:55,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 06:48:55,028 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:48:55,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:48:55,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1154128602, now seen corresponding path program 1 times [2024-11-16 06:48:55,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:48:55,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710705668] [2024-11-16 06:48:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:48:55,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:48:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:48:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:48:55,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:48:55,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710705668] [2024-11-16 06:48:55,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710705668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:48:55,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085020491] [2024-11-16 06:48:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:48:55,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:48:55,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:48:55,090 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) [2024-11-16 06:48:55,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 06:48:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:48:55,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-16 06:48:55,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:48:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:48:55,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:48:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:48:55,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085020491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:48:55,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:48:55,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-16 06:48:55,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518804892] [2024-11-16 06:48:55,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:48:55,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 06:48:55,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:48:55,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 06:48:55,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-16 06:48:55,238 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2024-11-16 06:48:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:48:55,275 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2024-11-16 06:48:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 06:48:55,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 11 [2024-11-16 06:48:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:48:55,277 INFO L225 Difference]: With dead ends: 29 [2024-11-16 06:48:55,279 INFO L226 Difference]: Without dead ends: 21 [2024-11-16 06:48:55,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-16 06:48:55,281 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:48:55,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:48:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-16 06:48:55,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-16 06:48:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-16 06:48:55,290 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2024-11-16 06:48:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:48:55,290 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-16 06:48:55,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2024-11-16 06:48:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-16 06:48:55,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-16 06:48:55,291 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:48:55,291 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:48:55,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 06:48:55,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:48:55,492 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:48:55,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:48:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash -540282981, now seen corresponding path program 1 times [2024-11-16 06:48:55,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:48:55,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100603109] [2024-11-16 06:48:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:48:55,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:48:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:48:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 06:48:55,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:48:55,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100603109] [2024-11-16 06:48:55,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100603109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:48:55,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068493995] [2024-11-16 06:48:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:48:55,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:48:55,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:48:55,606 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) [2024-11-16 06:48:55,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 06:48:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:48:55,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 06:48:55,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:48:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 06:48:55,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:48:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 06:48:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068493995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:48:55,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:48:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-16 06:48:55,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102387323] [2024-11-16 06:48:55,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:48:55,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 06:48:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:48:55,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 06:48:55,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-16 06:48:55,743 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:55,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:48:55,768 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2024-11-16 06:48:55,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 06:48:55,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-16 06:48:55,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:48:55,769 INFO L225 Difference]: With dead ends: 46 [2024-11-16 06:48:55,769 INFO L226 Difference]: Without dead ends: 33 [2024-11-16 06:48:55,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-16 06:48:55,770 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:48:55,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:48:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-16 06:48:55,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-16 06:48:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2024-11-16 06:48:55,778 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2024-11-16 06:48:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:48:55,779 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2024-11-16 06:48:55,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:55,780 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2024-11-16 06:48:55,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-16 06:48:55,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:48:55,781 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:48:55,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-16 06:48:55,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-16 06:48:55,986 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:48:55,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:48:55,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1485008933, now seen corresponding path program 2 times [2024-11-16 06:48:55,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:48:55,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259848900] [2024-11-16 06:48:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:48:55,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:48:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:48:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 06:48:56,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:48:56,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259848900] [2024-11-16 06:48:56,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259848900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:48:56,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806122952] [2024-11-16 06:48:56,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 06:48:56,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:48:56,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:48:56,138 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) [2024-11-16 06:48:56,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 06:48:56,177 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 06:48:56,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:48:56,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 06:48:56,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:48:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 06:48:56,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:48:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 06:48:56,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806122952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:48:56,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:48:56,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-16 06:48:56,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086553261] [2024-11-16 06:48:56,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:48:56,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 06:48:56,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:48:56,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 06:48:56,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-16 06:48:56,422 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:48:56,478 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2024-11-16 06:48:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 06:48:56,478 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-16 06:48:56,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:48:56,479 INFO L225 Difference]: With dead ends: 70 [2024-11-16 06:48:56,479 INFO L226 Difference]: Without dead ends: 57 [2024-11-16 06:48:56,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-16 06:48:56,480 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:48:56,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:48:56,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-16 06:48:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-16 06:48:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2024-11-16 06:48:56,487 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 32 [2024-11-16 06:48:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:48:56,487 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2024-11-16 06:48:56,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2024-11-16 06:48:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-16 06:48:56,488 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:48:56,488 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:48:56,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 06:48:56,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:48:56,689 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:48:56,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:48:56,690 INFO L85 PathProgramCache]: Analyzing trace with hash -538791845, now seen corresponding path program 3 times [2024-11-16 06:48:56,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:48:56,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653710854] [2024-11-16 06:48:56,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:48:56,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:48:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:48:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 75 proven. 315 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 06:48:56,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:48:56,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653710854] [2024-11-16 06:48:56,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653710854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:48:56,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980364235] [2024-11-16 06:48:56,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 06:48:56,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:48:56,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:48:57,000 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) [2024-11-16 06:48:57,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 06:48:57,032 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 06:48:57,032 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:48:57,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 06:48:57,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:48:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2024-11-16 06:48:57,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:48:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2024-11-16 06:48:57,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980364235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:48:57,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:48:57,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 27 [2024-11-16 06:48:57,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745346270] [2024-11-16 06:48:57,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:48:57,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-16 06:48:57,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:48:57,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-16 06:48:57,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2024-11-16 06:48:57,363 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:48:57,663 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2024-11-16 06:48:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-16 06:48:57,664 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 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 56 [2024-11-16 06:48:57,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:48:57,664 INFO L225 Difference]: With dead ends: 119 [2024-11-16 06:48:57,664 INFO L226 Difference]: Without dead ends: 101 [2024-11-16 06:48:57,665 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=547, Invalid=1433, Unknown=0, NotChecked=0, Total=1980 [2024-11-16 06:48:57,666 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:48:57,666 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 87 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:48:57,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-16 06:48:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 72. [2024-11-16 06:48:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2024-11-16 06:48:57,673 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 56 [2024-11-16 06:48:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:48:57,673 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2024-11-16 06:48:57,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2024-11-16 06:48:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-16 06:48:57,674 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:48:57,674 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 15, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:48:57,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 06:48:57,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:48:57,875 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:48:57,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:48:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1360546054, now seen corresponding path program 4 times [2024-11-16 06:48:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:48:57,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340814801] [2024-11-16 06:48:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:48:57,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:48:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:48:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 272 proven. 360 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 06:48:58,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:48:58,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340814801] [2024-11-16 06:48:58,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340814801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:48:58,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132721089] [2024-11-16 06:48:58,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 06:48:58,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:48:58,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:48:58,149 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) [2024-11-16 06:48:58,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 06:48:58,201 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 06:48:58,201 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:48:58,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-16 06:48:58,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:48:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 272 proven. 360 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 06:48:58,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:48:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 272 proven. 360 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 06:48:58,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132721089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:48:58,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:48:58,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2024-11-16 06:48:58,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788755819] [2024-11-16 06:48:58,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:48:58,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-16 06:48:58,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:48:58,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-16 06:48:58,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 06:48:58,693 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 35 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:48:58,776 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2024-11-16 06:48:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-16 06:48:58,776 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 35 states have internal predecessors, (111), 0 states have call successors, (0), 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 71 [2024-11-16 06:48:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:48:58,777 INFO L225 Difference]: With dead ends: 145 [2024-11-16 06:48:58,777 INFO L226 Difference]: Without dead ends: 123 [2024-11-16 06:48:58,778 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 06:48:58,779 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:48:58,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:48:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-16 06:48:58,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-11-16 06:48:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0573770491803278) internal successors, (129), 122 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2024-11-16 06:48:58,790 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 71 [2024-11-16 06:48:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:48:58,790 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2024-11-16 06:48:58,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 35 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:48:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2024-11-16 06:48:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-16 06:48:58,793 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:48:58,793 INFO L215 NwaCegarLoop]: trace histogram [39, 38, 32, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:48:58,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 06:48:58,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:48:58,998 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:48:58,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:48:58,998 INFO L85 PathProgramCache]: Analyzing trace with hash 829492859, now seen corresponding path program 5 times [2024-11-16 06:48:58,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:48:58,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194577014] [2024-11-16 06:48:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:48:58,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:48:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:48:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 561 proven. 1584 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 06:48:59,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:48:59,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194577014] [2024-11-16 06:48:59,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194577014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:48:59,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625549167] [2024-11-16 06:48:59,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 06:48:59,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:48:59,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:48:59,690 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) [2024-11-16 06:48:59,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 06:48:59,760 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2024-11-16 06:48:59,761 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:48:59,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-16 06:48:59,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:48:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 561 proven. 1584 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 06:48:59,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:49:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 561 proven. 1584 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 06:49:01,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625549167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:49:01,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:49:01,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-11-16 06:49:01,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933214529] [2024-11-16 06:49:01,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:49:01,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-16 06:49:01,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:49:01,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-16 06:49:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-11-16 06:49:01,176 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 69 states, 69 states have (on average 3.0869565217391304) internal successors, (213), 69 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:49:01,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:49:01,359 INFO L93 Difference]: Finished difference Result 247 states and 292 transitions. [2024-11-16 06:49:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-16 06:49:01,360 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.0869565217391304) internal successors, (213), 69 states have internal predecessors, (213), 0 states have call successors, (0), 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 122 [2024-11-16 06:49:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:49:01,362 INFO L225 Difference]: With dead ends: 247 [2024-11-16 06:49:01,363 INFO L226 Difference]: Without dead ends: 225 [2024-11-16 06:49:01,365 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-11-16 06:49:01,366 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:49:01,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:49:01,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-16 06:49:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2024-11-16 06:49:01,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.03125) internal successors, (231), 224 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:49:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 231 transitions. [2024-11-16 06:49:01,385 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 231 transitions. Word has length 122 [2024-11-16 06:49:01,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:49:01,385 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 231 transitions. [2024-11-16 06:49:01,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.0869565217391304) internal successors, (213), 69 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:49:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 231 transitions. [2024-11-16 06:49:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2024-11-16 06:49:01,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:49:01,390 INFO L215 NwaCegarLoop]: trace histogram [73, 72, 66, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:49:01,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 06:49:01,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:49:01,596 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:49:01,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:49:01,597 INFO L85 PathProgramCache]: Analyzing trace with hash -995584869, now seen corresponding path program 6 times [2024-11-16 06:49:01,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:49:01,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336976598] [2024-11-16 06:49:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:49:01,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:49:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:49:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 1139 proven. 6633 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 06:49:03,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:49:03,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336976598] [2024-11-16 06:49:03,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336976598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:49:03,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201112779] [2024-11-16 06:49:03,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 06:49:03,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:49:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:49:03,764 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) [2024-11-16 06:49:03,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 06:49:03,806 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-16 06:49:03,806 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:49:03,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 06:49:03,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:49:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 1179 refuted. 0 times theorem prover too weak. 6633 trivial. 0 not checked. [2024-11-16 06:49:04,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:49:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 1179 refuted. 0 times theorem prover too weak. 6633 trivial. 0 not checked. [2024-11-16 06:49:04,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201112779] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:49:04,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:49:04,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 11, 11] total 87 [2024-11-16 06:49:04,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272525802] [2024-11-16 06:49:04,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:49:04,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-16 06:49:04,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:49:04,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-16 06:49:04,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2483, Invalid=4999, Unknown=0, NotChecked=0, Total=7482 [2024-11-16 06:49:04,654 INFO L87 Difference]: Start difference. First operand 225 states and 231 transitions. Second operand has 87 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 87 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:49:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:49:06,573 INFO L93 Difference]: Finished difference Result 332 states and 371 transitions. [2024-11-16 06:49:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-16 06:49:06,574 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 87 states have internal predecessors, (259), 0 states have call successors, (0), 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 224 [2024-11-16 06:49:06,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:49:06,575 INFO L225 Difference]: With dead ends: 332 [2024-11-16 06:49:06,575 INFO L226 Difference]: Without dead ends: 301 [2024-11-16 06:49:06,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8129, Invalid=17631, Unknown=0, NotChecked=0, Total=25760 [2024-11-16 06:49:06,580 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:49:06,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 167 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:49:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-16 06:49:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 252. [2024-11-16 06:49:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0597609561752988) internal successors, (266), 251 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:49:06,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 266 transitions. [2024-11-16 06:49:06,591 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 266 transitions. Word has length 224 [2024-11-16 06:49:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:49:06,591 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 266 transitions. [2024-11-16 06:49:06,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 87 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:49:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 266 transitions. [2024-11-16 06:49:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2024-11-16 06:49:06,594 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:49:06,594 INFO L215 NwaCegarLoop]: trace histogram [82, 81, 67, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:49:06,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 06:49:06,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:49:06,795 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:49:06,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:49:06,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1541419322, now seen corresponding path program 7 times [2024-11-16 06:49:06,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:49:06,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202253554] [2024-11-16 06:49:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:49:06,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:49:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:49:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 2788 proven. 6834 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-16 06:49:08,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:49:08,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202253554] [2024-11-16 06:49:08,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202253554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:49:08,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135155602] [2024-11-16 06:49:08,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 06:49:08,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:49:08,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:49:08,862 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) [2024-11-16 06:49:08,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 06:49:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:49:08,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-16 06:49:08,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:49:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 2788 proven. 6834 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-16 06:49:09,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:49:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 2788 proven. 6834 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-16 06:49:13,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135155602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:49:13,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:49:13,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2024-11-16 06:49:13,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182732270] [2024-11-16 06:49:13,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:49:13,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2024-11-16 06:49:13,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:49:13,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2024-11-16 06:49:13,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-11-16 06:49:13,008 INFO L87 Difference]: Start difference. First operand 252 states and 266 transitions. Second operand has 139 states, 139 states have (on average 3.0431654676258995) internal successors, (423), 139 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:49:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:49:13,464 INFO L93 Difference]: Finished difference Result 505 states and 601 transitions. [2024-11-16 06:49:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-11-16 06:49:13,465 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 3.0431654676258995) internal successors, (423), 139 states have internal predecessors, (423), 0 states have call successors, (0), 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 251 [2024-11-16 06:49:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:49:13,466 INFO L225 Difference]: With dead ends: 505 [2024-11-16 06:49:13,466 INFO L226 Difference]: Without dead ends: 459 [2024-11-16 06:49:13,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-11-16 06:49:13,468 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 06:49:13,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 177 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 06:49:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-16 06:49:13,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2024-11-16 06:49:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.0327510917030567) internal successors, (473), 458 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:49:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 473 transitions. [2024-11-16 06:49:13,488 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 473 transitions. Word has length 251 [2024-11-16 06:49:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:49:13,488 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 473 transitions. [2024-11-16 06:49:13,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 3.0431654676258995) internal successors, (423), 139 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:49:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 473 transitions. [2024-11-16 06:49:13,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2024-11-16 06:49:13,493 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:49:13,493 INFO L215 NwaCegarLoop]: trace histogram [151, 150, 136, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:49:13,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-16 06:49:13,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-16 06:49:13,698 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:49:13,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:49:13,699 INFO L85 PathProgramCache]: Analyzing trace with hash -389269765, now seen corresponding path program 8 times [2024-11-16 06:49:13,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:49:13,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842350154] [2024-11-16 06:49:13,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:49:13,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:49:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:49:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 33825 backedges. 5617 proven. 27948 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-16 06:49:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:49:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842350154] [2024-11-16 06:49:21,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842350154] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:49:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453663771] [2024-11-16 06:49:21,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 06:49:21,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:49:21,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:49:21,593 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) [2024-11-16 06:49:21,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 06:49:21,687 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 06:49:21,687 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:49:21,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-11-16 06:49:21,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:49:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 33825 backedges. 5617 proven. 27948 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-16 06:49:22,103 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:49:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 33825 backedges. 5617 proven. 27948 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-16 06:49:37,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453663771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:49:37,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:49:37,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2024-11-16 06:49:37,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616615068] [2024-11-16 06:49:37,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:49:37,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2024-11-16 06:49:37,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:49:37,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2024-11-16 06:49:37,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-11-16 06:49:37,132 INFO L87 Difference]: Start difference. First operand 459 states and 473 transitions. Second operand has 277 states, 277 states have (on average 3.0216606498194944) internal successors, (837), 277 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:49:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:49:38,991 INFO L93 Difference]: Finished difference Result 919 states and 1084 transitions. [2024-11-16 06:49:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2024-11-16 06:49:38,991 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 3.0216606498194944) internal successors, (837), 277 states have internal predecessors, (837), 0 states have call successors, (0), 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 458 [2024-11-16 06:49:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:49:38,994 INFO L225 Difference]: With dead ends: 919 [2024-11-16 06:49:38,994 INFO L226 Difference]: Without dead ends: 873 [2024-11-16 06:49:38,998 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 778 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-11-16 06:49:38,999 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 06:49:38,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 300 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 06:49:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2024-11-16 06:49:39,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2024-11-16 06:49:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.0172018348623852) internal successors, (887), 872 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:49:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 887 transitions. [2024-11-16 06:49:39,018 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 887 transitions. Word has length 458 [2024-11-16 06:49:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:49:39,019 INFO L471 AbstractCegarLoop]: Abstraction has 873 states and 887 transitions. [2024-11-16 06:49:39,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 3.0216606498194944) internal successors, (837), 277 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:49:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 887 transitions. [2024-11-16 06:49:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2024-11-16 06:49:39,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:49:39,033 INFO L215 NwaCegarLoop]: trace histogram [289, 288, 274, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:49:39,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 06:49:39,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:49:39,237 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:49:39,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:49:39,237 INFO L85 PathProgramCache]: Analyzing trace with hash -115596389, now seen corresponding path program 9 times [2024-11-16 06:49:39,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:49:39,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775439981] [2024-11-16 06:49:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:49:39,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:49:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:50:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 124560 backedges. 11275 proven. 113025 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-16 06:50:13,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:50:13,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775439981] [2024-11-16 06:50:13,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775439981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:50:13,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279290838] [2024-11-16 06:50:13,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 06:50:13,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:50:13,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:50:13,291 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) [2024-11-16 06:50:13,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 06:50:13,356 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-16 06:50:13,356 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:50:13,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-16 06:50:13,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:50:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 124560 backedges. 0 proven. 11535 refuted. 0 times theorem prover too weak. 113025 trivial. 0 not checked. [2024-11-16 06:50:15,306 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:50:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 124560 backedges. 0 proven. 11535 refuted. 0 times theorem prover too weak. 113025 trivial. 0 not checked. [2024-11-16 06:50:17,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279290838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:50:17,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:50:17,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 19, 19] total 311 [2024-11-16 06:50:17,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664083251] [2024-11-16 06:50:17,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:50:17,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 311 states [2024-11-16 06:50:17,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:50:17,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 311 interpolants. [2024-11-16 06:50:17,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38747, Invalid=57663, Unknown=0, NotChecked=0, Total=96410 [2024-11-16 06:50:17,469 INFO L87 Difference]: Start difference. First operand 873 states and 887 transitions. Second operand has 311 states, 311 states have (on average 2.9935691318327975) internal successors, (931), 311 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)