./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum3.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 d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 22:18:15,457 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 22:18:15,518 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 22:18:15,522 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 22:18:15,523 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 22:18:15,555 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 22:18:15,557 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 22:18:15,557 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 22:18:15,558 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 22:18:15,558 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 22:18:15,559 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 22:18:15,559 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 22:18:15,560 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 22:18:15,561 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 22:18:15,561 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 22:18:15,562 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 22:18:15,562 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 22:18:15,562 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 22:18:15,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 22:18:15,563 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 22:18:15,563 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 22:18:15,567 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 22:18:15,568 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 22:18:15,568 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 22:18:15,568 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 22:18:15,568 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 22:18:15,569 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 22:18:15,569 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 22:18:15,569 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 22:18:15,569 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 22:18:15,570 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 22:18:15,570 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 22:18:15,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:18:15,570 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 22:18:15,571 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 22:18:15,571 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 22:18:15,572 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 22:18:15,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 22:18:15,573 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 22:18:15,573 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 22:18:15,573 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 22:18:15,574 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 22:18:15,574 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 [2024-10-13 22:18:15,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 22:18:15,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 22:18:15,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 22:18:15,865 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 22:18:15,866 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 22:18:15,868 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum3.c [2024-10-13 22:18:17,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 22:18:17,494 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 22:18:17,497 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum3.c [2024-10-13 22:18:17,506 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ef6a3f4/274765d3c12d41d7b997d15bcc08dc6b/FLAG0ece0b891 [2024-10-13 22:18:17,520 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ef6a3f4/274765d3c12d41d7b997d15bcc08dc6b [2024-10-13 22:18:17,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 22:18:17,525 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 22:18:17,528 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 22:18:17,529 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 22:18:17,534 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 22:18:17,535 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,536 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5055edeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17, skipping insertion in model container [2024-10-13 22:18:17,537 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,556 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 22:18:17,710 WARN L248 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_sum3.c[400,413] [2024-10-13 22:18:17,741 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:18:17,754 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 22:18:17,776 WARN L248 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_sum3.c[400,413] [2024-10-13 22:18:17,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:18:17,808 INFO L204 MainTranslator]: Completed translation [2024-10-13 22:18:17,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17 WrapperNode [2024-10-13 22:18:17,809 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 22:18:17,810 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 22:18:17,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 22:18:17,811 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 22:18:17,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,829 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,852 INFO L138 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2024-10-13 22:18:17,853 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 22:18:17,854 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 22:18:17,854 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 22:18:17,854 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 22:18:17,864 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,868 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,884 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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]. [2024-10-13 22:18:17,887 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,887 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,896 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,903 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,908 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,909 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,915 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 22:18:17,916 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 22:18:17,916 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 22:18:17,916 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 22:18:17,917 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (1/1) ... [2024-10-13 22:18:17,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:18:17,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:17,949 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) [2024-10-13 22:18:17,953 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 [2024-10-13 22:18:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 22:18:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 22:18:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 22:18:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 22:18:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 22:18:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 22:18:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 22:18:18,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 22:18:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 22:18:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 22:18:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 22:18:18,089 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 22:18:18,092 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 22:18:18,275 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-10-13 22:18:18,276 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 22:18:18,311 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 22:18:18,311 INFO L314 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-13 22:18:18,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:18:18 BoogieIcfgContainer [2024-10-13 22:18:18,312 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 22:18:18,314 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 22:18:18,314 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 22:18:18,317 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 22:18:18,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:18:17" (1/3) ... [2024-10-13 22:18:18,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc80dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:18:18, skipping insertion in model container [2024-10-13 22:18:18,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:18:17" (2/3) ... [2024-10-13 22:18:18,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc80dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:18:18, skipping insertion in model container [2024-10-13 22:18:18,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:18:18" (3/3) ... [2024-10-13 22:18:18,320 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2024-10-13 22:18:18,333 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 22:18:18,333 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 22:18:18,395 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 22:18:18,401 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;@2d7de3be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 22:18:18,401 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 22:18:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 21 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) [2024-10-13 22:18:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 22:18:18,411 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:18,411 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:18,412 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:18,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:18,416 INFO L85 PathProgramCache]: Analyzing trace with hash -978184044, now seen corresponding path program 1 times [2024-10-13 22:18:18,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:18,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087652117] [2024-10-13 22:18:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:18,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:18:18,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:18,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087652117] [2024-10-13 22:18:18,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087652117] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:18:18,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:18:18,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 22:18:18,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956728486] [2024-10-13 22:18:18,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:18:18,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 22:18:18,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:18,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 22:18:18,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:18:18,599 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 21 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 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:18:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:18,632 INFO L93 Difference]: Finished difference Result 41 states and 68 transitions. [2024-10-13 22:18:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 22:18:18,634 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 22:18:18,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:18,641 INFO L225 Difference]: With dead ends: 41 [2024-10-13 22:18:18,641 INFO L226 Difference]: Without dead ends: 19 [2024-10-13 22:18:18,644 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 [2024-10-13 22:18:18,647 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:18,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:18:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-13 22:18:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-13 22:18:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2024-10-13 22:18:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2024-10-13 22:18:18,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 18 [2024-10-13 22:18:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:18,680 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2024-10-13 22:18:18,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:18:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2024-10-13 22:18:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 22:18:18,681 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:18,681 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:18,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 22:18:18,682 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:18,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:18,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2084842272, now seen corresponding path program 1 times [2024-10-13 22:18:18,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:18,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530669490] [2024-10-13 22:18:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:18,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:18:18,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:18,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530669490] [2024-10-13 22:18:18,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530669490] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:18:18,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:18:18,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 22:18:18,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26752946] [2024-10-13 22:18:18,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:18:18,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:18:18,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:18:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:18:18,834 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:18:18,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:18,883 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2024-10-13 22:18:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:18:18,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 22:18:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:18,885 INFO L225 Difference]: With dead ends: 36 [2024-10-13 22:18:18,885 INFO L226 Difference]: Without dead ends: 20 [2024-10-13 22:18:18,887 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 [2024-10-13 22:18:18,888 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:18,889 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:18:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-13 22:18:18,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-13 22:18:18,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2024-10-13 22:18:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-10-13 22:18:18,895 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 18 [2024-10-13 22:18:18,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:18,895 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-10-13 22:18:18,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:18:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2024-10-13 22:18:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 22:18:18,897 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:18,897 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:18,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 22:18:18,897 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:18,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:18,900 INFO L85 PathProgramCache]: Analyzing trace with hash 429836754, now seen corresponding path program 1 times [2024-10-13 22:18:18,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:18,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646766308] [2024-10-13 22:18:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:18,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:18:19,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:19,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646766308] [2024-10-13 22:18:19,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646766308] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:18:19,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:18:19,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:18:19,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063206958] [2024-10-13 22:18:19,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:18:19,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:18:19,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:19,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:18:19,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:18:19,055 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2024-10-13 22:18:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:19,125 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2024-10-13 22:18:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:18:19,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-13 22:18:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:19,127 INFO L225 Difference]: With dead ends: 40 [2024-10-13 22:18:19,127 INFO L226 Difference]: Without dead ends: 26 [2024-10-13 22:18:19,127 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 [2024-10-13 22:18:19,128 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:19,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 13 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:18:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-13 22:18:19,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-10-13 22:18:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 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) [2024-10-13 22:18:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-10-13 22:18:19,135 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 19 [2024-10-13 22:18:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:19,136 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-10-13 22:18:19,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2024-10-13 22:18:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-10-13 22:18:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 22:18:19,137 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:19,137 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] [2024-10-13 22:18:19,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 22:18:19,138 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:19,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:19,139 INFO L85 PathProgramCache]: Analyzing trace with hash 185456906, now seen corresponding path program 1 times [2024-10-13 22:18:19,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:19,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120304377] [2024-10-13 22:18:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:19,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:18:19,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:19,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120304377] [2024-10-13 22:18:19,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120304377] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:19,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987720818] [2024-10-13 22:18:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:19,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:19,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:19,326 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) [2024-10-13 22:18:19,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 22:18:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:19,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 22:18:19,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:18:19,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:18:19,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987720818] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:19,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:19,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-13 22:18:19,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314310191] [2024-10-13 22:18:19,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:19,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 22:18:19,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:19,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 22:18:19,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-13 22:18:19,505 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2024-10-13 22:18:19,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:19,560 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2024-10-13 22:18:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:18:19,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-13 22:18:19,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:19,561 INFO L225 Difference]: With dead ends: 49 [2024-10-13 22:18:19,561 INFO L226 Difference]: Without dead ends: 27 [2024-10-13 22:18:19,562 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-13 22:18:19,563 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:19,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:18:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-13 22:18:19,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-13 22:18:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:18:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-10-13 22:18:19,568 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 25 [2024-10-13 22:18:19,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:19,569 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-10-13 22:18:19,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2024-10-13 22:18:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-10-13 22:18:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 22:18:19,570 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:19,571 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:19,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 22:18:19,775 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 [2024-10-13 22:18:19,776 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:19,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash -927551976, now seen corresponding path program 2 times [2024-10-13 22:18:19,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:19,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880388209] [2024-10-13 22:18:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-13 22:18:19,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:19,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880388209] [2024-10-13 22:18:19,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880388209] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:19,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296227985] [2024-10-13 22:18:19,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:18:19,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:19,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:19,919 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) [2024-10-13 22:18:19,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 22:18:19,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:18:19,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:18:19,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 22:18:19,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-13 22:18:20,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-13 22:18:20,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296227985] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:20,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:20,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-10-13 22:18:20,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924930285] [2024-10-13 22:18:20,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:20,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 22:18:20,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 22:18:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-13 22:18:20,114 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:18:20,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:20,190 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2024-10-13 22:18:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 22:18:20,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-13 22:18:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:20,192 INFO L225 Difference]: With dead ends: 52 [2024-10-13 22:18:20,192 INFO L226 Difference]: Without dead ends: 33 [2024-10-13 22:18:20,192 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-13 22:18:20,193 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:20,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:18:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-13 22:18:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-10-13 22:18:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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) [2024-10-13 22:18:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-10-13 22:18:20,204 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 26 [2024-10-13 22:18:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:20,204 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-10-13 22:18:20,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:18:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-10-13 22:18:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-13 22:18:20,205 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:20,205 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:20,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 22:18:20,405 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 [2024-10-13 22:18:20,406 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:20,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:20,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1100979040, now seen corresponding path program 3 times [2024-10-13 22:18:20,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:20,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397580780] [2024-10-13 22:18:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:18:22,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:22,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397580780] [2024-10-13 22:18:22,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397580780] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:22,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790134559] [2024-10-13 22:18:22,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:18:22,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:22,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:22,192 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) [2024-10-13 22:18:22,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 22:18:22,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 22:18:22,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:18:22,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-13 22:18:22,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:22,318 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 [2024-10-13 22:18:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:18:22,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 22:18:22,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790134559] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:22,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:22,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 18 [2024-10-13 22:18:22,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751629672] [2024-10-13 22:18:22,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:22,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 22:18:22,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:22,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 22:18:22,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-10-13 22:18:22,707 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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) [2024-10-13 22:18:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:22,898 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2024-10-13 22:18:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 22:18:22,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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) Word has length 32 [2024-10-13 22:18:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:22,900 INFO L225 Difference]: With dead ends: 58 [2024-10-13 22:18:22,900 INFO L226 Difference]: Without dead ends: 54 [2024-10-13 22:18:22,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-10-13 22:18:22,901 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:22,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 94 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:18:22,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-13 22:18:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-10-13 22:18:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 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) [2024-10-13 22:18:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2024-10-13 22:18:22,916 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 32 [2024-10-13 22:18:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:22,917 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2024-10-13 22:18:22,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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) [2024-10-13 22:18:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2024-10-13 22:18:22,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-13 22:18:22,918 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:22,918 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:22,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 22:18:23,122 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 [2024-10-13 22:18:23,123 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:23,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:23,124 INFO L85 PathProgramCache]: Analyzing trace with hash -891767627, now seen corresponding path program 4 times [2024-10-13 22:18:23,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:23,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995763899] [2024-10-13 22:18:23,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:23,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:18:23,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:23,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995763899] [2024-10-13 22:18:23,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995763899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:23,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662435338] [2024-10-13 22:18:23,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:18:23,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:23,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:23,232 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) [2024-10-13 22:18:23,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 22:18:23,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:18:23,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:18:23,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:18:23,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:18:23,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:18:23,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662435338] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:23,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:23,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-10-13 22:18:23,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412580355] [2024-10-13 22:18:23,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:23,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 22:18:23,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:23,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 22:18:23,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-10-13 22:18:23,445 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) [2024-10-13 22:18:23,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:23,631 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2024-10-13 22:18:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 22:18:23,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 33 [2024-10-13 22:18:23,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:23,632 INFO L225 Difference]: With dead ends: 109 [2024-10-13 22:18:23,632 INFO L226 Difference]: Without dead ends: 60 [2024-10-13 22:18:23,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-10-13 22:18:23,633 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:23,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:18:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-13 22:18:23,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2024-10-13 22:18:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 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) [2024-10-13 22:18:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-10-13 22:18:23,642 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2024-10-13 22:18:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:23,642 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-10-13 22:18:23,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) [2024-10-13 22:18:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-10-13 22:18:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-13 22:18:23,643 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:23,643 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:23,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 22:18:23,843 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 [2024-10-13 22:18:23,844 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:23,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:23,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1276218571, now seen corresponding path program 5 times [2024-10-13 22:18:23,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:23,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888520666] [2024-10-13 22:18:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:23,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:18:23,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:23,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888520666] [2024-10-13 22:18:23,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888520666] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:23,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829989684] [2024-10-13 22:18:23,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:18:23,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:23,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:23,970 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) [2024-10-13 22:18:23,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 22:18:24,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 22:18:24,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:18:24,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:18:24,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:18:24,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 22:18:24,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829989684] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:24,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:24,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-13 22:18:24,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489972351] [2024-10-13 22:18:24,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:24,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:18:24,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:18:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:18:24,182 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2024-10-13 22:18:24,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:24,278 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2024-10-13 22:18:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 22:18:24,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 34 [2024-10-13 22:18:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:24,280 INFO L225 Difference]: With dead ends: 60 [2024-10-13 22:18:24,280 INFO L226 Difference]: Without dead ends: 40 [2024-10-13 22:18:24,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-13 22:18:24,281 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:24,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 27 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:18:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-13 22:18:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-10-13 22:18:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:18:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2024-10-13 22:18:24,293 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 34 [2024-10-13 22:18:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:24,293 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2024-10-13 22:18:24,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2024-10-13 22:18:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2024-10-13 22:18:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-13 22:18:24,296 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:24,296 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:24,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 22:18:24,500 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 [2024-10-13 22:18:24,501 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:24,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:24,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1120646518, now seen corresponding path program 6 times [2024-10-13 22:18:24,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:24,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33956561] [2024-10-13 22:18:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:24,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:18:26,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:26,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33956561] [2024-10-13 22:18:26,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33956561] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:26,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948276550] [2024-10-13 22:18:26,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:18:26,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:26,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:26,839 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) [2024-10-13 22:18:26,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 22:18:26,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 22:18:26,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:18:26,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-13 22:18:26,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:18:27,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:27,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:18:27,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2024-10-13 22:18:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:18:27,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948276550] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:27,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:27,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 12, 12] total 41 [2024-10-13 22:18:27,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009101430] [2024-10-13 22:18:27,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:27,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-13 22:18:27,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:27,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-13 22:18:27,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1502, Unknown=0, NotChecked=0, Total=1640 [2024-10-13 22:18:27,908 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 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) [2024-10-13 22:18:29,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:29,274 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2024-10-13 22:18:29,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 22:18:29,275 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 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 [2024-10-13 22:18:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:29,276 INFO L225 Difference]: With dead ends: 97 [2024-10-13 22:18:29,276 INFO L226 Difference]: Without dead ends: 93 [2024-10-13 22:18:29,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=293, Invalid=2899, Unknown=0, NotChecked=0, Total=3192 [2024-10-13 22:18:29,279 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:29,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 114 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-13 22:18:29,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-13 22:18:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2024-10-13 22:18:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 57 states have internal predecessors, (68), 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) [2024-10-13 22:18:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-10-13 22:18:29,296 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 39 [2024-10-13 22:18:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:29,297 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-10-13 22:18:29,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 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) [2024-10-13 22:18:29,297 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-10-13 22:18:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-13 22:18:29,298 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:29,298 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:29,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 22:18:29,499 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 [2024-10-13 22:18:29,500 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:29,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash 536518859, now seen corresponding path program 7 times [2024-10-13 22:18:29,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:29,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224477002] [2024-10-13 22:18:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:29,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 22:18:29,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:29,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224477002] [2024-10-13 22:18:29,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224477002] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:29,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597438476] [2024-10-13 22:18:29,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:18:29,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:29,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:29,688 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) [2024-10-13 22:18:29,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 22:18:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:29,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 22:18:29,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 22:18:29,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 22:18:29,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597438476] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:29,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:29,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-13 22:18:29,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928101013] [2024-10-13 22:18:29,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:29,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 22:18:29,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:29,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 22:18:29,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-10-13 22:18:29,899 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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) [2024-10-13 22:18:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:30,050 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2024-10-13 22:18:30,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 22:18:30,051 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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 40 [2024-10-13 22:18:30,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:30,051 INFO L225 Difference]: With dead ends: 137 [2024-10-13 22:18:30,051 INFO L226 Difference]: Without dead ends: 59 [2024-10-13 22:18:30,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-10-13 22:18:30,052 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:30,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:18:30,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-13 22:18:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-10-13 22:18:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 58 states have internal predecessors, (69), 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) [2024-10-13 22:18:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2024-10-13 22:18:30,063 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 40 [2024-10-13 22:18:30,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:30,065 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2024-10-13 22:18:30,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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) [2024-10-13 22:18:30,066 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2024-10-13 22:18:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-13 22:18:30,066 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:30,066 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:30,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 22:18:30,267 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 [2024-10-13 22:18:30,268 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:30,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:30,269 INFO L85 PathProgramCache]: Analyzing trace with hash 283594237, now seen corresponding path program 8 times [2024-10-13 22:18:30,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:30,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407177375] [2024-10-13 22:18:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-13 22:18:30,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:30,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407177375] [2024-10-13 22:18:30,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407177375] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:30,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95337873] [2024-10-13 22:18:30,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:18:30,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:30,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:30,397 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) [2024-10-13 22:18:30,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 22:18:30,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:18:30,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:18:30,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 22:18:30,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-13 22:18:30,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-13 22:18:30,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95337873] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:30,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:30,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-13 22:18:30,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846978101] [2024-10-13 22:18:30,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:30,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 22:18:30,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:30,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 22:18:30,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-10-13 22:18:30,659 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:18:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:30,769 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2024-10-13 22:18:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 22:18:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-10-13 22:18:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:30,770 INFO L225 Difference]: With dead ends: 94 [2024-10-13 22:18:30,770 INFO L226 Difference]: Without dead ends: 47 [2024-10-13 22:18:30,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-10-13 22:18:30,771 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:30,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:18:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-13 22:18:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-10-13 22:18:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 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) [2024-10-13 22:18:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2024-10-13 22:18:30,780 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 41 [2024-10-13 22:18:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:30,780 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2024-10-13 22:18:30,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:18:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2024-10-13 22:18:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-13 22:18:30,781 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:30,781 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:30,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 22:18:30,982 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 [2024-10-13 22:18:30,983 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:30,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:30,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1329532448, now seen corresponding path program 9 times [2024-10-13 22:18:30,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:30,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886068441] [2024-10-13 22:18:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:30,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:18:34,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:34,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886068441] [2024-10-13 22:18:34,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886068441] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:34,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816614977] [2024-10-13 22:18:34,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:18:34,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:34,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:34,323 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) [2024-10-13 22:18:34,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 22:18:34,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 22:18:34,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:18:34,411 WARN L253 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-10-13 22:18:34,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:34,437 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 [2024-10-13 22:18:35,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:18:35,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 14 [2024-10-13 22:18:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:18:35,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:18:37,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816614977] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:37,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:37,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32, 38] total 97 [2024-10-13 22:18:37,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53037914] [2024-10-13 22:18:37,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:37,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-10-13 22:18:37,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:37,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-10-13 22:18:37,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=8571, Unknown=0, NotChecked=0, Total=9312 [2024-10-13 22:18:37,870 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 97 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 97 states have internal predecessors, (128), 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) [2024-10-13 22:18:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:45,838 INFO L93 Difference]: Finished difference Result 273 states and 324 transitions. [2024-10-13 22:18:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-10-13 22:18:45,839 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 97 states have internal predecessors, (128), 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 46 [2024-10-13 22:18:45,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:45,841 INFO L225 Difference]: With dead ends: 273 [2024-10-13 22:18:45,841 INFO L226 Difference]: Without dead ends: 165 [2024-10-13 22:18:45,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7793 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3447, Invalid=27353, Unknown=0, NotChecked=0, Total=30800 [2024-10-13 22:18:45,848 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 326 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4106 mSolverCounterSat, 1305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 5411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1305 IncrementalHoareTripleChecker+Valid, 4106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:45,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 324 Invalid, 5411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1305 Valid, 4106 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-10-13 22:18:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-10-13 22:18:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 91. [2024-10-13 22:18:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 90 states have internal predecessors, (107), 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) [2024-10-13 22:18:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2024-10-13 22:18:45,880 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 46 [2024-10-13 22:18:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:45,880 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2024-10-13 22:18:45,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 97 states have internal predecessors, (128), 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) [2024-10-13 22:18:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2024-10-13 22:18:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-13 22:18:45,881 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:45,881 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:45,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 22:18:46,082 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 [2024-10-13 22:18:46,082 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:46,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:46,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1237134891, now seen corresponding path program 10 times [2024-10-13 22:18:46,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:46,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627773836] [2024-10-13 22:18:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:46,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-13 22:18:46,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:46,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627773836] [2024-10-13 22:18:46,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627773836] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:46,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813506534] [2024-10-13 22:18:46,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:18:46,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:46,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:46,250 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) [2024-10-13 22:18:46,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 22:18:46,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:18:46,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:18:46,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 22:18:46,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-13 22:18:46,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-13 22:18:46,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813506534] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:46,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:46,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2024-10-13 22:18:46,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958119678] [2024-10-13 22:18:46,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:46,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-13 22:18:46,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:46,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-13 22:18:46,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2024-10-13 22:18:46,629 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 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) [2024-10-13 22:18:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:46,864 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2024-10-13 22:18:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 22:18:46,865 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 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 [2024-10-13 22:18:46,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:46,865 INFO L225 Difference]: With dead ends: 137 [2024-10-13 22:18:46,865 INFO L226 Difference]: Without dead ends: 75 [2024-10-13 22:18:46,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2024-10-13 22:18:46,866 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:46,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 73 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:18:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-13 22:18:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2024-10-13 22:18:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 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) [2024-10-13 22:18:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2024-10-13 22:18:46,884 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 49 [2024-10-13 22:18:46,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:46,884 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2024-10-13 22:18:46,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 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) [2024-10-13 22:18:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2024-10-13 22:18:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-13 22:18:46,885 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:46,885 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:46,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 22:18:47,085 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 [2024-10-13 22:18:47,086 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:47,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash 179850250, now seen corresponding path program 11 times [2024-10-13 22:18:47,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:47,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493047993] [2024-10-13 22:18:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:47,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:18:51,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:51,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493047993] [2024-10-13 22:18:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493047993] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:51,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061524048] [2024-10-13 22:18:51,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:18:51,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:51,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:51,250 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) [2024-10-13 22:18:51,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 22:18:51,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 22:18:51,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:18:51,342 WARN L253 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-10-13 22:18:51,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:51,397 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 [2024-10-13 22:18:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:18:51,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:18:52,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061524048] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:52,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:52,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 21, 15] total 60 [2024-10-13 22:18:52,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674920191] [2024-10-13 22:18:52,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:52,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-13 22:18:52,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:52,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-13 22:18:52,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=3330, Unknown=0, NotChecked=0, Total=3540 [2024-10-13 22:18:52,399 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 60 states, 60 states have (on average 2.2333333333333334) internal successors, (134), 60 states have internal predecessors, (134), 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) [2024-10-13 22:18:54,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:54,410 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2024-10-13 22:18:54,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-13 22:18:54,411 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.2333333333333334) internal successors, (134), 60 states have internal predecessors, (134), 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 53 [2024-10-13 22:18:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:54,412 INFO L225 Difference]: With dead ends: 129 [2024-10-13 22:18:54,412 INFO L226 Difference]: Without dead ends: 125 [2024-10-13 22:18:54,414 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=553, Invalid=6757, Unknown=0, NotChecked=0, Total=7310 [2024-10-13 22:18:54,415 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:54,415 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 142 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-13 22:18:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-13 22:18:54,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 78. [2024-10-13 22:18:54,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 77 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) [2024-10-13 22:18:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2024-10-13 22:18:54,442 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 53 [2024-10-13 22:18:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:54,442 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2024-10-13 22:18:54,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.2333333333333334) internal successors, (134), 60 states have internal predecessors, (134), 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) [2024-10-13 22:18:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2024-10-13 22:18:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-13 22:18:54,443 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:54,443 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:54,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-13 22:18:54,643 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 [2024-10-13 22:18:54,644 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:54,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:54,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1248788661, now seen corresponding path program 12 times [2024-10-13 22:18:54,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:54,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520394835] [2024-10-13 22:18:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:54,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 22:18:54,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:54,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520394835] [2024-10-13 22:18:54,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520394835] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:54,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983127658] [2024-10-13 22:18:54,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:18:54,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:54,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:54,864 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) [2024-10-13 22:18:54,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 22:18:54,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-13 22:18:54,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:18:54,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 22:18:54,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 22:18:55,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 22:18:55,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983127658] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:55,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:55,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2024-10-13 22:18:55,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491398437] [2024-10-13 22:18:55,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:55,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-13 22:18:55,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:55,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-13 22:18:55,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-10-13 22:18:55,304 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 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) [2024-10-13 22:18:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:55,861 INFO L93 Difference]: Finished difference Result 210 states and 243 transitions. [2024-10-13 22:18:55,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 22:18:55,861 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 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 54 [2024-10-13 22:18:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:55,862 INFO L225 Difference]: With dead ends: 210 [2024-10-13 22:18:55,862 INFO L226 Difference]: Without dead ends: 104 [2024-10-13 22:18:55,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=1755, Unknown=0, NotChecked=0, Total=2070 [2024-10-13 22:18:55,863 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:55,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 72 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 22:18:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-13 22:18:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2024-10-13 22:18:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 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) [2024-10-13 22:18:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2024-10-13 22:18:55,894 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 54 [2024-10-13 22:18:55,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:55,894 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2024-10-13 22:18:55,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 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) [2024-10-13 22:18:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2024-10-13 22:18:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-13 22:18:55,895 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:55,895 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:55,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-13 22:18:56,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 22:18:56,096 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:56,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:56,096 INFO L85 PathProgramCache]: Analyzing trace with hash 90091382, now seen corresponding path program 13 times [2024-10-13 22:18:56,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:56,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114929091] [2024-10-13 22:18:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:56,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-10-13 22:18:56,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:56,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114929091] [2024-10-13 22:18:56,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114929091] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:56,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733152141] [2024-10-13 22:18:56,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:18:56,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:56,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:56,281 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:18:56,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 22:18:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:56,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 22:18:56,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-10-13 22:18:56,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-10-13 22:18:56,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733152141] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:56,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:56,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-13 22:18:56,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540250996] [2024-10-13 22:18:56,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:56,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 22:18:56,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:56,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 22:18:56,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2024-10-13 22:18:56,544 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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) [2024-10-13 22:18:56,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:56,674 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2024-10-13 22:18:56,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 22:18:56,675 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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 [2024-10-13 22:18:56,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:56,675 INFO L225 Difference]: With dead ends: 120 [2024-10-13 22:18:56,675 INFO L226 Difference]: Without dead ends: 61 [2024-10-13 22:18:56,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2024-10-13 22:18:56,676 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:56,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 35 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:18:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-13 22:18:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-10-13 22:18:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 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) [2024-10-13 22:18:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2024-10-13 22:18:56,701 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 55 [2024-10-13 22:18:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:56,701 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2024-10-13 22:18:56,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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) [2024-10-13 22:18:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2024-10-13 22:18:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-13 22:18:56,701 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:56,701 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:56,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-13 22:18:56,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 22:18:56,902 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:56,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:56,902 INFO L85 PathProgramCache]: Analyzing trace with hash 997205920, now seen corresponding path program 14 times [2024-10-13 22:18:56,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:56,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152467089] [2024-10-13 22:18:56,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:56,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:19:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 2 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:19:02,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:19:02,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152467089] [2024-10-13 22:19:02,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152467089] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:19:02,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551603856] [2024-10-13 22:19:02,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:19:02,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:19:02,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:19:02,331 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:19:02,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 22:19:02,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:19:02,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:19:02,419 WARN L253 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 165 conjuncts are in the unsatisfiable core [2024-10-13 22:19:02,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:19:02,446 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 [2024-10-13 22:19:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:19:02,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:19:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 22:19:03,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551603856] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:19:03,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:19:03,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 24, 17] total 69 [2024-10-13 22:19:03,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763679676] [2024-10-13 22:19:03,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:19:03,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-10-13 22:19:03,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:19:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-10-13 22:19:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=4404, Unknown=0, NotChecked=0, Total=4692 [2024-10-13 22:19:03,681 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 69 states have internal predecessors, (151), 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) [2024-10-13 22:19:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:19:06,192 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2024-10-13 22:19:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-10-13 22:19:06,193 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 69 states have internal predecessors, (151), 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 60 [2024-10-13 22:19:06,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:19:06,194 INFO L225 Difference]: With dead ends: 169 [2024-10-13 22:19:06,194 INFO L226 Difference]: Without dead ends: 165 [2024-10-13 22:19:06,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=723, Invalid=8783, Unknown=0, NotChecked=0, Total=9506 [2024-10-13 22:19:06,195 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:19:06,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 149 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-13 22:19:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-10-13 22:19:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 105. [2024-10-13 22:19:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 104 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:19:06,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2024-10-13 22:19:06,236 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 60 [2024-10-13 22:19:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:19:06,236 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2024-10-13 22:19:06,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 69 states have internal predecessors, (151), 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) [2024-10-13 22:19:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2024-10-13 22:19:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-13 22:19:06,238 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:19:06,238 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:19:06,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-13 22:19:06,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:19:06,438 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:19:06,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:19:06,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1285364661, now seen corresponding path program 15 times [2024-10-13 22:19:06,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:19:06,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414675063] [2024-10-13 22:19:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:19:06,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:19:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:19:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-10-13 22:19:06,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:19:06,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414675063] [2024-10-13 22:19:06,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414675063] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:19:06,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907278219] [2024-10-13 22:19:06,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:19:06,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:19:06,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:19:06,679 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:19:06,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 22:19:06,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-13 22:19:06,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:19:06,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 22:19:06,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:19:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-10-13 22:19:06,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:19:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-10-13 22:19:07,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907278219] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:19:07,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:19:07,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2024-10-13 22:19:07,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331217268] [2024-10-13 22:19:07,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:19:07,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-13 22:19:07,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:19:07,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-13 22:19:07,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2024-10-13 22:19:07,151 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 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) [2024-10-13 22:19:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:19:07,890 INFO L93 Difference]: Finished difference Result 238 states and 272 transitions. [2024-10-13 22:19:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-13 22:19:07,893 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 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 61 [2024-10-13 22:19:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:19:07,894 INFO L225 Difference]: With dead ends: 238 [2024-10-13 22:19:07,894 INFO L226 Difference]: Without dead ends: 117 [2024-10-13 22:19:07,894 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=2348, Unknown=0, NotChecked=0, Total=2756 [2024-10-13 22:19:07,895 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 22:19:07,895 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 113 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 22:19:07,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-10-13 22:19:07,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2024-10-13 22:19:07,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 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) [2024-10-13 22:19:07,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2024-10-13 22:19:07,938 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 61 [2024-10-13 22:19:07,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:19:07,939 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2024-10-13 22:19:07,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 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) [2024-10-13 22:19:07,939 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2024-10-13 22:19:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-13 22:19:07,939 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:19:07,939 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:19:07,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-13 22:19:08,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 22:19:08,140 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:19:08,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:19:08,140 INFO L85 PathProgramCache]: Analyzing trace with hash -203587844, now seen corresponding path program 16 times [2024-10-13 22:19:08,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:19:08,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228102125] [2024-10-13 22:19:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:19:08,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:19:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:19:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-13 22:19:08,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:19:08,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228102125] [2024-10-13 22:19:08,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228102125] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:19:08,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588678910] [2024-10-13 22:19:08,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:19:08,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:19:08,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:19:08,370 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:19:08,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 22:19:08,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:19:08,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:19:08,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 22:19:08,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:19:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-13 22:19:08,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:19:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-13 22:19:08,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588678910] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:19:08,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:19:08,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2024-10-13 22:19:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811470118] [2024-10-13 22:19:08,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:19:08,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-13 22:19:08,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:19:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-13 22:19:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2024-10-13 22:19:08,901 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 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) [2024-10-13 22:19:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:19:09,190 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2024-10-13 22:19:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 22:19:09,190 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 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 62 [2024-10-13 22:19:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:19:09,191 INFO L225 Difference]: With dead ends: 134 [2024-10-13 22:19:09,191 INFO L226 Difference]: Without dead ends: 68 [2024-10-13 22:19:09,192 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=1763, Unknown=0, NotChecked=0, Total=2070 [2024-10-13 22:19:09,192 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:19:09,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 69 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:19:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-13 22:19:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-10-13 22:19:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 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) [2024-10-13 22:19:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2024-10-13 22:19:09,243 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 62 [2024-10-13 22:19:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:19:09,243 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2024-10-13 22:19:09,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 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) [2024-10-13 22:19:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2024-10-13 22:19:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-13 22:19:09,244 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:19:09,244 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:19:09,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-13 22:19:09,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:19:09,449 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:19:09,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:19:09,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1212800394, now seen corresponding path program 17 times [2024-10-13 22:19:09,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:19:09,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586120208] [2024-10-13 22:19:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:19:09,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:19:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:19:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 10 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:19:16,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:19:16,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586120208] [2024-10-13 22:19:16,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586120208] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:19:16,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715316894] [2024-10-13 22:19:16,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:19:16,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:19:16,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:19:16,649 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:19:16,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 22:19:17,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-13 22:19:17,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:19:17,053 WARN L253 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 199 conjuncts are in the unsatisfiable core [2024-10-13 22:19:17,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:19:17,079 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 [2024-10-13 22:19:17,092 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 [2024-10-13 22:19:17,100 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 [2024-10-13 22:19:17,108 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 [2024-10-13 22:19:17,153 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 [2024-10-13 22:19:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:19:17,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:19:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-13 22:19:18,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715316894] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:19:18,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:19:18,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 27, 19] total 73 [2024-10-13 22:19:18,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287750843] [2024-10-13 22:19:18,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:19:18,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-10-13 22:19:18,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:19:18,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-10-13 22:19:18,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=4970, Unknown=0, NotChecked=0, Total=5256 [2024-10-13 22:19:18,565 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 73 states, 73 states have (on average 2.1780821917808217) internal successors, (159), 73 states have internal predecessors, (159), 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) [2024-10-13 22:19:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:19:21,291 INFO L93 Difference]: Finished difference Result 161 states and 182 transitions. [2024-10-13 22:19:21,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-13 22:19:21,291 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1780821917808217) internal successors, (159), 73 states have internal predecessors, (159), 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 67 [2024-10-13 22:19:21,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:19:21,292 INFO L225 Difference]: With dead ends: 161 [2024-10-13 22:19:21,292 INFO L226 Difference]: Without dead ends: 157 [2024-10-13 22:19:21,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=675, Invalid=9225, Unknown=0, NotChecked=0, Total=9900 [2024-10-13 22:19:21,293 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-13 22:19:21,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 141 Invalid, 2970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-13 22:19:21,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-10-13 22:19:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 98. [2024-10-13 22:19:21,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 97 states have internal predecessors, (108), 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) [2024-10-13 22:19:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2024-10-13 22:19:21,343 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 67 [2024-10-13 22:19:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:19:21,343 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2024-10-13 22:19:21,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1780821917808217) internal successors, (159), 73 states have internal predecessors, (159), 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) [2024-10-13 22:19:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2024-10-13 22:19:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-13 22:19:21,344 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:19:21,344 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:19:21,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-13 22:19:21,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:19:21,545 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:19:21,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:19:21,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1443958219, now seen corresponding path program 18 times [2024-10-13 22:19:21,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:19:21,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273590341] [2024-10-13 22:19:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:19:21,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:19:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:19:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-13 22:19:21,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:19:21,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273590341] [2024-10-13 22:19:21,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273590341] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:19:21,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170054622] [2024-10-13 22:19:21,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:19:21,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:19:21,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:19:21,796 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:19:21,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 22:19:21,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-13 22:19:21,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:19:21,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 22:19:21,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:19:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-13 22:19:22,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:19:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-13 22:19:22,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170054622] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:19:22,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:19:22,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-10-13 22:19:22,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107314257] [2024-10-13 22:19:22,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:19:22,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-13 22:19:22,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:19:22,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-13 22:19:22,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2024-10-13 22:19:22,297 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 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) [2024-10-13 22:19:22,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:19:22,541 INFO L93 Difference]: Finished difference Result 233 states and 258 transitions. [2024-10-13 22:19:22,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 22:19:22,542 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 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 68 [2024-10-13 22:19:22,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:19:22,543 INFO L225 Difference]: With dead ends: 233 [2024-10-13 22:19:22,543 INFO L226 Difference]: Without dead ends: 99 [2024-10-13 22:19:22,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2024-10-13 22:19:22,544 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:19:22,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 47 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:19:22,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-13 22:19:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-10-13 22:19:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1122448979591837) internal successors, (109), 98 states have internal predecessors, (109), 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) [2024-10-13 22:19:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2024-10-13 22:19:22,601 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 68 [2024-10-13 22:19:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:19:22,601 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2024-10-13 22:19:22,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 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) [2024-10-13 22:19:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2024-10-13 22:19:22,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-13 22:19:22,601 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:19:22,602 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:19:22,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-13 22:19:22,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:19:22,802 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:19:22,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:19:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash -66921475, now seen corresponding path program 19 times [2024-10-13 22:19:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:19:22,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622081015] [2024-10-13 22:19:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:19:22,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:19:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:19:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-10-13 22:19:23,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:19:23,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622081015] [2024-10-13 22:19:23,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622081015] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:19:23,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296719452] [2024-10-13 22:19:23,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:19:23,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:19:23,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:19:23,101 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:19:23,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-13 22:19:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:19:23,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 22:19:23,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:19:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-10-13 22:19:23,376 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:19:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-10-13 22:19:23,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296719452] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:19:23,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:19:23,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-10-13 22:19:23,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629463965] [2024-10-13 22:19:23,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:19:23,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-13 22:19:23,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:19:23,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-13 22:19:23,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2024-10-13 22:19:23,506 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 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) [2024-10-13 22:19:23,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:19:23,680 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2024-10-13 22:19:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 22:19:23,681 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 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 69 [2024-10-13 22:19:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:19:23,682 INFO L225 Difference]: With dead ends: 154 [2024-10-13 22:19:23,682 INFO L226 Difference]: Without dead ends: 75 [2024-10-13 22:19:23,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2024-10-13 22:19:23,683 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:19:23,683 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 49 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:19:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-13 22:19:23,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-10-13 22:19:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 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) [2024-10-13 22:19:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2024-10-13 22:19:23,720 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 69 [2024-10-13 22:19:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:19:23,720 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2024-10-13 22:19:23,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 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) [2024-10-13 22:19:23,721 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2024-10-13 22:19:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-13 22:19:23,721 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:19:23,721 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:19:23,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-13 22:19:23,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:19:23,922 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:19:23,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:19:23,922 INFO L85 PathProgramCache]: Analyzing trace with hash 310620448, now seen corresponding path program 20 times [2024-10-13 22:19:23,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:19:23,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355303118] [2024-10-13 22:19:23,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:19:23,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:19:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat