./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d 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/array-crafted/zero_sum2.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 9040b900faf23bbe274a78992b583d0e69cb8306e352833058a15642ef75b25a --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 10:01:58,357 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 10:01:58,420 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 10:01:58,425 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 10:01:58,427 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 10:01:58,454 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 10:01:58,455 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 10:01:58,456 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 10:01:58,456 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 10:01:58,460 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 10:01:58,460 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 10:01:58,460 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 10:01:58,461 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 10:01:58,461 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 10:01:58,461 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 10:01:58,462 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 10:01:58,462 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 10:01:58,462 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 10:01:58,462 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 10:01:58,463 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 10:01:58,463 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 10:01:58,465 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 10:01:58,465 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 10:01:58,465 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 10:01:58,465 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 10:01:58,466 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 10:01:58,466 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 10:01:58,466 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 10:01:58,467 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 10:01:58,467 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 10:01:58,468 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 10:01:58,468 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 10:01:58,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:01:58,469 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 10:01:58,469 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 10:01:58,469 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 10:01:58,469 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 10:01:58,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 10:01:58,470 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 10:01:58,470 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 10:01:58,470 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 10:01:58,470 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 10:01:58,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9040b900faf23bbe274a78992b583d0e69cb8306e352833058a15642ef75b25a [2024-11-08 10:01:58,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 10:01:58,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 10:01:58,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 10:01:58,769 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 10:01:58,769 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 10:01:58,770 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum2.c [2024-11-08 10:02:00,189 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 10:02:00,370 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 10:02:00,371 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum2.c [2024-11-08 10:02:00,378 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5556987c/5d242559ef604add9df2ccc77359a5a3/FLAG2205dada7 [2024-11-08 10:02:00,389 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5556987c/5d242559ef604add9df2ccc77359a5a3 [2024-11-08 10:02:00,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 10:02:00,393 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 10:02:00,395 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 10:02:00,395 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 10:02:00,401 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 10:02:00,402 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,403 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3407a6f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00, skipping insertion in model container [2024-11-08 10:02:00,403 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,425 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 10:02:00,598 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/array-crafted/zero_sum2.c[400,413] [2024-11-08 10:02:00,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:02:00,624 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 10:02:00,637 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/array-crafted/zero_sum2.c[400,413] [2024-11-08 10:02:00,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:02:00,667 INFO L204 MainTranslator]: Completed translation [2024-11-08 10:02:00,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00 WrapperNode [2024-11-08 10:02:00,668 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 10:02:00,669 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 10:02:00,669 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 10:02:00,669 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 10:02:00,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,682 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,698 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2024-11-08 10:02:00,698 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 10:02:00,699 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 10:02:00,699 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 10:02:00,699 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 10:02:00,711 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,713 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,726 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-08 10:02:00,727 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,727 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,735 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,740 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,741 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,742 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,743 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 10:02:00,744 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 10:02:00,744 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 10:02:00,744 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 10:02:00,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (1/1) ... [2024-11-08 10:02:00,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:02:00,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:02:00,776 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) [2024-11-08 10:02:00,778 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 [2024-11-08 10:02:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 10:02:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 10:02:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 10:02:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 10:02:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 10:02:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 10:02:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 10:02:00,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 10:02:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 10:02:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 10:02:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 10:02:00,886 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 10:02:00,888 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 10:02:01,034 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-08 10:02:01,035 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 10:02:01,045 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 10:02:01,046 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-08 10:02:01,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:02:01 BoogieIcfgContainer [2024-11-08 10:02:01,046 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 10:02:01,048 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 10:02:01,049 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 10:02:01,052 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 10:02:01,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 10:02:00" (1/3) ... [2024-11-08 10:02:01,053 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a320a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:02:01, skipping insertion in model container [2024-11-08 10:02:01,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:02:00" (2/3) ... [2024-11-08 10:02:01,053 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a320a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:02:01, skipping insertion in model container [2024-11-08 10:02:01,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:02:01" (3/3) ... [2024-11-08 10:02:01,055 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum2.c [2024-11-08 10:02:01,070 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 10:02:01,070 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 10:02:01,118 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 10:02:01,124 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;@d8644e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 10:02:01,124 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 10:02:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 10:02:01,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:02:01,134 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:02:01,135 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:02:01,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:02:01,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2024-11-08 10:02:01,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:02:01,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019186293] [2024-11-08 10:02:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:01,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:02:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:02:01,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:02:01,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019186293] [2024-11-08 10:02:01,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019186293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:02:01,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:02:01,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 10:02:01,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550967136] [2024-11-08 10:02:01,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:02:01,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 10:02:01,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:02:01,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 10:02:01,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 10:02:01,367 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 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 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:02:01,384 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2024-11-08 10:02:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 10:02:01,386 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-08 10:02:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:02:01,393 INFO L225 Difference]: With dead ends: 47 [2024-11-08 10:02:01,393 INFO L226 Difference]: Without dead ends: 21 [2024-11-08 10:02:01,396 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 [2024-11-08 10:02:01,400 INFO L432 NwaCegarLoop]: 31 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, 31 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 [2024-11-08 10:02:01,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:02:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-08 10:02:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-08 10:02:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-08 10:02:01,435 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2024-11-08 10:02:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:02:01,435 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-08 10:02:01,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-08 10:02:01,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 10:02:01,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:02:01,437 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:02:01,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 10:02:01,438 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:02:01,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:02:01,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2024-11-08 10:02:01,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:02:01,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552940760] [2024-11-08 10:02:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:01,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:02:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:02:01,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:02:01,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552940760] [2024-11-08 10:02:01,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552940760] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:02:01,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:02:01,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 10:02:01,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81766206] [2024-11-08 10:02:01,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:02:01,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 10:02:01,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:02:01,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 10:02:01,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 10:02:01,601 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:01,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:02:01,651 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2024-11-08 10:02:01,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 10:02:01,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-08 10:02:01,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:02:01,654 INFO L225 Difference]: With dead ends: 39 [2024-11-08 10:02:01,654 INFO L226 Difference]: Without dead ends: 23 [2024-11-08 10:02:01,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 10:02:01,657 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:02:01,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:02:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-08 10:02:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2024-11-08 10:02:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-08 10:02:01,666 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2024-11-08 10:02:01,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:02:01,666 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-08 10:02:01,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:01,667 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-08 10:02:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-08 10:02:01,668 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:02:01,668 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:02:01,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 10:02:01,669 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:02:01,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:02:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2024-11-08 10:02:01,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:02:01,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202681609] [2024-11-08 10:02:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:01,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:02:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:02:01,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:02:01,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202681609] [2024-11-08 10:02:01,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202681609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:02:01,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:02:01,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 10:02:01,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710379821] [2024-11-08 10:02:01,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:02:01,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 10:02:01,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:02:01,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 10:02:01,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:02:01,812 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:02:01,889 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2024-11-08 10:02:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 10:02:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-08 10:02:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:02:01,893 INFO L225 Difference]: With dead ends: 43 [2024-11-08 10:02:01,893 INFO L226 Difference]: Without dead ends: 30 [2024-11-08 10:02:01,894 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:02:01,895 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:02:01,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 15 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:02:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-08 10:02:01,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2024-11-08 10:02:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-08 10:02:01,905 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2024-11-08 10:02:01,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:02:01,905 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-08 10:02:01,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:01,906 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-08 10:02:01,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-08 10:02:01,906 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:02:01,906 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:02:01,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 10:02:01,907 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:02:01,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:02:01,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2024-11-08 10:02:01,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:02:01,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811320566] [2024-11-08 10:02:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:01,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:02:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:02:02,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:02:02,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811320566] [2024-11-08 10:02:02,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811320566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:02:02,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962793808] [2024-11-08 10:02:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:02,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:02,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:02:02,062 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) [2024-11-08 10:02:02,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 10:02:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:02,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 10:02:02,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:02:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:02:02,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:02:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:02:02,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962793808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:02:02,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:02:02,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-08 10:02:02,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069544433] [2024-11-08 10:02:02,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:02:02,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 10:02:02,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:02:02,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 10:02:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-08 10:02:02,281 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:02,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:02:02,330 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-11-08 10:02:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 10:02:02,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-08 10:02:02,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:02:02,332 INFO L225 Difference]: With dead ends: 49 [2024-11-08 10:02:02,332 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 10:02:02,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-08 10:02:02,335 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:02:02,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:02:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 10:02:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-11-08 10:02:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-08 10:02:02,342 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2024-11-08 10:02:02,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:02:02,344 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-08 10:02:02,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:02,344 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-08 10:02:02,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-08 10:02:02,345 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:02:02,345 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:02:02,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 10:02:02,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:02,546 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:02:02,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:02:02,547 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2024-11-08 10:02:02,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:02:02,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921711896] [2024-11-08 10:02:02,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:02,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:02:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 10:02:02,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:02:02,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921711896] [2024-11-08 10:02:02,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921711896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:02:02,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765039306] [2024-11-08 10:02:02,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:02:02,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:02:02,682 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) [2024-11-08 10:02:02,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 10:02:02,757 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:02:02,757 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:02:02,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 10:02:02,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:02:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 10:02:02,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:02:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 10:02:02,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765039306] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:02:02,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:02:02,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-08 10:02:02,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056496320] [2024-11-08 10:02:02,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:02:02,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 10:02:02,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:02:02,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 10:02:02,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-08 10:02:02,906 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:02:03,002 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2024-11-08 10:02:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 10:02:03,003 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-08 10:02:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:02:03,003 INFO L225 Difference]: With dead ends: 56 [2024-11-08 10:02:03,003 INFO L226 Difference]: Without dead ends: 40 [2024-11-08 10:02:03,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-11-08 10:02:03,004 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:02:03,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 15 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:02:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-08 10:02:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2024-11-08 10:02:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-11-08 10:02:03,016 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2024-11-08 10:02:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:02:03,016 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-11-08 10:02:03,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-11-08 10:02:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 10:02:03,017 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:02:03,017 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:02:03,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 10:02:03,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:03,218 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:02:03,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:02:03,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2024-11-08 10:02:03,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:02:03,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705538794] [2024-11-08 10:02:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:03,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:02:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:02:04,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:02:04,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705538794] [2024-11-08 10:02:04,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705538794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:02:04,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111513126] [2024-11-08 10:02:04,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:02:04,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:04,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:02:04,778 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) [2024-11-08 10:02:04,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 10:02:04,844 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 10:02:04,845 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:02:04,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 10:02:04,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:02:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:02:05,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:02:05,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:02:05,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-08 10:02:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:02:05,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111513126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:02:05,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:02:05,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 25 [2024-11-08 10:02:05,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068799701] [2024-11-08 10:02:05,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:02:05,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 10:02:05,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:02:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 10:02:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-11-08 10:02:05,430 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:02:05,737 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2024-11-08 10:02:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 10:02:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-08 10:02:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:02:05,739 INFO L225 Difference]: With dead ends: 61 [2024-11-08 10:02:05,739 INFO L226 Difference]: Without dead ends: 57 [2024-11-08 10:02:05,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-11-08 10:02:05,740 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 10:02:05,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 10:02:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-08 10:02:05,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2024-11-08 10:02:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-11-08 10:02:05,748 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2024-11-08 10:02:05,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:02:05,749 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-11-08 10:02:05,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:05,749 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-11-08 10:02:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 10:02:05,750 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:02:05,750 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:02:05,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 10:02:05,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:05,955 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:02:05,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:02:05,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2024-11-08 10:02:05,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:02:05,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815960274] [2024-11-08 10:02:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:05,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:02:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 10:02:06,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:02:06,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815960274] [2024-11-08 10:02:06,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815960274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:02:06,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210924514] [2024-11-08 10:02:06,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:02:06,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:06,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:02:06,100 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) [2024-11-08 10:02:06,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 10:02:06,152 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:02:06,152 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:02:06,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 10:02:06,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:02:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 10:02:06,251 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:02:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 10:02:06,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210924514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:02:06,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:02:06,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-08 10:02:06,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665433075] [2024-11-08 10:02:06,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:02:06,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 10:02:06,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:02:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 10:02:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-08 10:02:06,337 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:02:06,526 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2024-11-08 10:02:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 10:02:06,526 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-08 10:02:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:02:06,527 INFO L225 Difference]: With dead ends: 115 [2024-11-08 10:02:06,527 INFO L226 Difference]: Without dead ends: 67 [2024-11-08 10:02:06,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-11-08 10:02:06,528 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:02:06,529 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 49 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:02:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-08 10:02:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2024-11-08 10:02:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2024-11-08 10:02:06,544 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2024-11-08 10:02:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:02:06,544 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2024-11-08 10:02:06,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2024-11-08 10:02:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-08 10:02:06,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:02:06,547 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:02:06,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 10:02:06,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:06,749 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:02:06,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:02:06,749 INFO L85 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2024-11-08 10:02:06,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:02:06,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583065324] [2024-11-08 10:02:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:06,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:02:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-08 10:02:06,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:02:06,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583065324] [2024-11-08 10:02:06,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583065324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:02:06,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926274015] [2024-11-08 10:02:06,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:02:06,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:06,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:02:06,865 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) [2024-11-08 10:02:06,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 10:02:06,941 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-08 10:02:06,941 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:02:06,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 10:02:06,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:02:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-08 10:02:07,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:02:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-08 10:02:07,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926274015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:02:07,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:02:07,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-08 10:02:07,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366304114] [2024-11-08 10:02:07,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:02:07,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 10:02:07,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:02:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 10:02:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-08 10:02:07,134 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:02:07,237 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2024-11-08 10:02:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 10:02:07,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-08 10:02:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:02:07,238 INFO L225 Difference]: With dead ends: 66 [2024-11-08 10:02:07,238 INFO L226 Difference]: Without dead ends: 50 [2024-11-08 10:02:07,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-11-08 10:02:07,239 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:02:07,240 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 20 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:02:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-08 10:02:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2024-11-08 10:02:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:07,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2024-11-08 10:02:07,245 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2024-11-08 10:02:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:02:07,245 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2024-11-08 10:02:07,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2024-11-08 10:02:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 10:02:07,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:02:07,246 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:02:07,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 10:02:07,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:07,447 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:02:07,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:02:07,448 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2024-11-08 10:02:07,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:02:07,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091272314] [2024-11-08 10:02:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:07,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:02:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:02:09,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:02:09,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091272314] [2024-11-08 10:02:09,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091272314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:02:09,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12324916] [2024-11-08 10:02:09,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:02:09,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:09,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:02:09,435 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) [2024-11-08 10:02:09,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 10:02:09,506 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-08 10:02:09,506 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:02:09,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-08 10:02:09,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:02:09,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 10:02:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:02:11,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:02:46,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-08 10:02:46,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:02:46,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2024-11-08 10:02:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:02:46,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12324916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:02:46,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:02:46,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 34] total 90 [2024-11-08 10:02:46,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699511133] [2024-11-08 10:02:46,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:02:46,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-11-08 10:02:46,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:02:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-11-08 10:02:46,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=7280, Unknown=10, NotChecked=0, Total=8010 [2024-11-08 10:02:46,629 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 90 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 90 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:02:48,834 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2024-11-08 10:02:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-08 10:02:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 90 states have internal predecessors, (114), 0 states have call successors, (0), 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 45 [2024-11-08 10:02:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:02:48,836 INFO L225 Difference]: With dead ends: 81 [2024-11-08 10:02:48,836 INFO L226 Difference]: Without dead ends: 77 [2024-11-08 10:02:48,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4229 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=911, Invalid=8979, Unknown=10, NotChecked=0, Total=9900 [2024-11-08 10:02:48,840 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-08 10:02:48,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 152 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-08 10:02:48,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-08 10:02:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2024-11-08 10:02:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2024-11-08 10:02:48,852 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2024-11-08 10:02:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:02:48,853 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2024-11-08 10:02:48,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 90 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2024-11-08 10:02:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-08 10:02:48,854 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:02:48,854 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:02:48,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 10:02:49,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:49,056 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:02:49,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:02:49,056 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2024-11-08 10:02:49,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:02:49,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225597038] [2024-11-08 10:02:49,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:49,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:02:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-08 10:02:49,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:02:49,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225597038] [2024-11-08 10:02:49,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225597038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:02:49,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064476680] [2024-11-08 10:02:49,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 10:02:49,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:49,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:02:49,209 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) [2024-11-08 10:02:49,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 10:02:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:49,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 10:02:49,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:02:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-08 10:02:49,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:02:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-08 10:02:49,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064476680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:02:49,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:02:49,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-08 10:02:49,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181828852] [2024-11-08 10:02:49,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:02:49,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 10:02:49,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:02:49,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 10:02:49,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-11-08 10:02:49,510 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:49,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:02:49,708 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2024-11-08 10:02:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 10:02:49,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 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 47 [2024-11-08 10:02:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:02:49,710 INFO L225 Difference]: With dead ends: 132 [2024-11-08 10:02:49,710 INFO L226 Difference]: Without dead ends: 70 [2024-11-08 10:02:49,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-11-08 10:02:49,711 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:02:49,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 53 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:02:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-08 10:02:49,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-11-08 10:02:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2024-11-08 10:02:49,721 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 47 [2024-11-08 10:02:49,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:02:49,721 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2024-11-08 10:02:49,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2024-11-08 10:02:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-08 10:02:49,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:02:49,726 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:02:49,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 10:02:49,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:49,927 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:02:49,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:02:49,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1331298990, now seen corresponding path program 8 times [2024-11-08 10:02:49,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:02:49,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77206456] [2024-11-08 10:02:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:49,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:02:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-08 10:02:50,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:02:50,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77206456] [2024-11-08 10:02:50,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77206456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:02:50,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327452722] [2024-11-08 10:02:50,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:02:50,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:50,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:02:50,058 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) [2024-11-08 10:02:50,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 10:02:50,127 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:02:50,127 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:02:50,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 10:02:50,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:02:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-08 10:02:50,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:02:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-08 10:02:50,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327452722] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:02:50,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:02:50,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-08 10:02:50,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410838821] [2024-11-08 10:02:50,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:02:50,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 10:02:50,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:02:50,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 10:02:50,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-11-08 10:02:50,304 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:02:50,452 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2024-11-08 10:02:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 10:02:50,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2024-11-08 10:02:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:02:50,453 INFO L225 Difference]: With dead ends: 101 [2024-11-08 10:02:50,453 INFO L226 Difference]: Without dead ends: 60 [2024-11-08 10:02:50,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-11-08 10:02:50,454 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:02:50,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:02:50,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-08 10:02:50,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2024-11-08 10:02:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2024-11-08 10:02:50,460 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2024-11-08 10:02:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:02:50,460 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2024-11-08 10:02:50,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:02:50,461 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2024-11-08 10:02:50,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-08 10:02:50,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:02:50,461 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:02:50,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 10:02:50,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 10:02:50,662 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:02:50,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:02:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2024-11-08 10:02:50,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:02:50,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183734135] [2024-11-08 10:02:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:02:50,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:02:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:02:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:02:53,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:02:53,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183734135] [2024-11-08 10:02:53,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183734135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:02:53,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712685795] [2024-11-08 10:02:53,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:02:53,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:02:53,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:02:53,463 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) [2024-11-08 10:02:53,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 10:02:53,530 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-08 10:02:53,530 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:02:53,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-08 10:02:53,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:02:53,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-08 10:02:55,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:02:55,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:02:55,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2024-11-08 10:02:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:02:56,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:02:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 10:02:59,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712685795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:02:59,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:02:59,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 43] total 121 [2024-11-08 10:02:59,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497503373] [2024-11-08 10:02:59,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:02:59,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-11-08 10:02:59,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:02:59,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-11-08 10:02:59,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=13494, Unknown=0, NotChecked=0, Total=14520 [2024-11-08 10:02:59,681 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 121 states, 121 states have (on average 1.2396694214876034) internal successors, (150), 121 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:03:06,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:03:06,073 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2024-11-08 10:03:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-08 10:03:06,074 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.2396694214876034) internal successors, (150), 121 states have internal predecessors, (150), 0 states have call successors, (0), 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 55 [2024-11-08 10:03:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:03:06,075 INFO L225 Difference]: With dead ends: 96 [2024-11-08 10:03:06,076 INFO L226 Difference]: Without dead ends: 92 [2024-11-08 10:03:06,081 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7951 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2338, Invalid=27418, Unknown=0, NotChecked=0, Total=29756 [2024-11-08 10:03:06,082 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 3104 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 3104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:03:06,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 169 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 3104 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-08 10:03:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-08 10:03:06,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2024-11-08 10:03:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:03:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2024-11-08 10:03:06,097 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2024-11-08 10:03:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:03:06,097 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2024-11-08 10:03:06,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.2396694214876034) internal successors, (150), 121 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:03:06,098 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2024-11-08 10:03:06,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-08 10:03:06,101 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:03:06,101 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:03:06,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 10:03:06,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:03:06,306 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:03:06,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:03:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2024-11-08 10:03:06,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:03:06,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338613343] [2024-11-08 10:03:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:03:06,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:03:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:03:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 10:03:06,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:03:06,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338613343] [2024-11-08 10:03:06,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338613343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:03:06,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448115076] [2024-11-08 10:03:06,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:03:06,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:03:06,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:03:06,484 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) [2024-11-08 10:03:06,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 10:03:06,547 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:03:06,547 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:03:06,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 10:03:06,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:03:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 10:03:06,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:03:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 10:03:06,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448115076] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:03:06,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:03:06,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-11-08 10:03:06,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505159011] [2024-11-08 10:03:06,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:03:06,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 10:03:06,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:03:06,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 10:03:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-11-08 10:03:06,913 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:03:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:03:07,205 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2024-11-08 10:03:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 10:03:07,205 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-08 10:03:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:03:07,206 INFO L225 Difference]: With dead ends: 171 [2024-11-08 10:03:07,206 INFO L226 Difference]: Without dead ends: 95 [2024-11-08 10:03:07,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2024-11-08 10:03:07,207 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 90 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:03:07,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 57 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:03:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-08 10:03:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2024-11-08 10:03:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:03:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2024-11-08 10:03:07,217 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2024-11-08 10:03:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:03:07,218 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2024-11-08 10:03:07,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:03:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2024-11-08 10:03:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-08 10:03:07,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:03:07,219 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:03:07,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 10:03:07,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 10:03:07,419 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:03:07,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:03:07,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2024-11-08 10:03:07,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:03:07,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887262101] [2024-11-08 10:03:07,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:03:07,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:03:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:03:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-08 10:03:07,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:03:07,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887262101] [2024-11-08 10:03:07,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887262101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:03:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906491672] [2024-11-08 10:03:07,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:03:07,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:03:07,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:03:07,595 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:03:07,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 10:03:07,716 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-08 10:03:07,716 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:03:07,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 10:03:07,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:03:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-08 10:03:07,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:03:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-08 10:03:08,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906491672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:03:08,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:03:08,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-11-08 10:03:08,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403535217] [2024-11-08 10:03:08,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:03:08,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 10:03:08,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:03:08,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 10:03:08,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-11-08 10:03:08,048 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:03:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:03:08,357 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2024-11-08 10:03:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 10:03:08,357 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-08 10:03:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:03:08,358 INFO L225 Difference]: With dead ends: 94 [2024-11-08 10:03:08,358 INFO L226 Difference]: Without dead ends: 70 [2024-11-08 10:03:08,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2024-11-08 10:03:08,358 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 104 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:03:08,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 41 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:03:08,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-08 10:03:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2024-11-08 10:03:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:03:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-08 10:03:08,367 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2024-11-08 10:03:08,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:03:08,367 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-08 10:03:08,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:03:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-08 10:03:08,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-08 10:03:08,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:03:08,368 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:03:08,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 10:03:08,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 10:03:08,569 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:03:08,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:03:08,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2024-11-08 10:03:08,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:03:08,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405972541] [2024-11-08 10:03:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:03:08,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:03:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:03:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:03:12,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:03:12,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405972541] [2024-11-08 10:03:12,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405972541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:03:12,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355402318] [2024-11-08 10:03:12,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:03:12,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:03:12,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:03:12,929 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:03:12,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 10:03:13,002 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-08 10:03:13,002 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:03:13,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-08 10:03:13,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:03:13,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 10:03:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:03:16,801 INFO L311 TraceCheckSpWp]: Computing backward predicates...