./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/indp2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/indp2.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 22448626353835b24dede83f92858a925e988e04b05430a9ca91763be927cf92 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 15:52:47,207 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 15:52:47,266 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 15:52:47,272 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 15:52:47,275 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 15:52:47,303 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 15:52:47,305 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 15:52:47,305 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 15:52:47,306 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 15:52:47,309 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 15:52:47,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 15:52:47,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 15:52:47,310 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 15:52:47,310 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 15:52:47,310 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 15:52:47,311 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 15:52:47,311 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 15:52:47,311 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 15:52:47,311 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 15:52:47,311 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 15:52:47,311 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 15:52:47,313 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 15:52:47,313 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 15:52:47,313 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 15:52:47,313 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 15:52:47,313 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 15:52:47,313 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 15:52:47,314 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 15:52:47,314 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 15:52:47,314 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 15:52:47,315 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 15:52:47,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 15:52:47,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 15:52:47,315 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 15:52:47,315 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 15:52:47,316 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 15:52:47,316 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 15:52:47,316 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 15:52:47,316 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 15:52:47,316 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 15:52:47,316 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 15:52:47,316 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 15:52:47,317 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22448626353835b24dede83f92858a925e988e04b05430a9ca91763be927cf92 [2024-11-11 15:52:47,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 15:52:47,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 15:52:47,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 15:52:47,530 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 15:52:47,530 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 15:52:47,531 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/indp2.c [2024-11-11 15:52:48,747 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 15:52:48,870 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 15:52:48,871 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp2.c [2024-11-11 15:52:48,876 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a2113bbb/d3f9a2fb215048a48c6faa206a643cbe/FLAG289445be7 [2024-11-11 15:52:49,294 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a2113bbb/d3f9a2fb215048a48c6faa206a643cbe [2024-11-11 15:52:49,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 15:52:49,297 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 15:52:49,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 15:52:49,298 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 15:52:49,302 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 15:52:49,302 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,303 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b9ed62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49, skipping insertion in model container [2024-11-11 15:52:49,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,319 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 15:52:49,457 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2024-11-11 15:52:49,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 15:52:49,486 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 15:52:49,498 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2024-11-11 15:52:49,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 15:52:49,517 INFO L204 MainTranslator]: Completed translation [2024-11-11 15:52:49,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49 WrapperNode [2024-11-11 15:52:49,517 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 15:52:49,518 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 15:52:49,518 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 15:52:49,518 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 15:52:49,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,529 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,549 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2024-11-11 15:52:49,549 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 15:52:49,550 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 15:52:49,550 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 15:52:49,550 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 15:52:49,558 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,559 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,575 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 8, 6]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 3 writes are split as follows [0, 0, 3]. [2024-11-11 15:52:49,576 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,576 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,579 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,582 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,582 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,583 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,584 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 15:52:49,585 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 15:52:49,585 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 15:52:49,585 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 15:52:49,586 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (1/1) ... [2024-11-11 15:52:49,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 15:52:49,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:52:49,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-11 15:52:49,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-11 15:52:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 15:52:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 15:52:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 15:52:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-11 15:52:49,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-11 15:52:49,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-11 15:52:49,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-11 15:52:49,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-11 15:52:49,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 15:52:49,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 15:52:49,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-11 15:52:49,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-11 15:52:49,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-11 15:52:49,718 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 15:52:49,720 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 15:52:49,855 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-11 15:52:49,855 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 15:52:49,864 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 15:52:49,864 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-11 15:52:49,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:52:49 BoogieIcfgContainer [2024-11-11 15:52:49,865 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 15:52:49,867 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 15:52:49,867 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 15:52:49,869 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 15:52:49,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 03:52:49" (1/3) ... [2024-11-11 15:52:49,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3870d0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:52:49, skipping insertion in model container [2024-11-11 15:52:49,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:52:49" (2/3) ... [2024-11-11 15:52:49,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3870d0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:52:49, skipping insertion in model container [2024-11-11 15:52:49,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:52:49" (3/3) ... [2024-11-11 15:52:49,874 INFO L112 eAbstractionObserver]: Analyzing ICFG indp2.c [2024-11-11 15:52:49,886 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 15:52:49,886 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 15:52:49,928 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 15:52:49,934 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;@1f9daf5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 15:52:49,934 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 15:52:49,937 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-11 15:52:49,941 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:52:49,942 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:52:49,942 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:52:49,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:52:49,946 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2024-11-11 15:52:49,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:52:49,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033908837] [2024-11-11 15:52:49,954 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:52:49,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:52:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:52:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:52:50,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:52:50,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033908837] [2024-11-11 15:52:50,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033908837] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:52:50,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:52:50,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 15:52:50,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876681172] [2024-11-11 15:52:50,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:52:50,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 15:52:50,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:52:50,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 15:52:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 15:52:50,104 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:50,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:52:50,114 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2024-11-11 15:52:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 15:52:50,116 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-11 15:52:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:52:50,122 INFO L225 Difference]: With dead ends: 44 [2024-11-11 15:52:50,122 INFO L226 Difference]: Without dead ends: 20 [2024-11-11 15:52:50,124 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 15:52:50,127 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:52:50,128 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:52:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-11 15:52:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-11 15:52:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-11 15:52:50,153 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2024-11-11 15:52:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:52:50,153 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-11 15:52:50,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-11 15:52:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-11 15:52:50,154 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:52:50,154 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:52:50,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 15:52:50,155 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:52:50,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:52:50,156 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2024-11-11 15:52:50,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:52:50,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612317484] [2024-11-11 15:52:50,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:52:50,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:52:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:52:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:52:50,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:52:50,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612317484] [2024-11-11 15:52:50,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612317484] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:52:50,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:52:50,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-11 15:52:50,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026963307] [2024-11-11 15:52:50,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:52:50,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 15:52:50,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:52:50,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 15:52:50,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-11 15:52:50,310 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:52:50,372 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2024-11-11 15:52:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-11 15:52:50,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-11 15:52:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:52:50,373 INFO L225 Difference]: With dead ends: 45 [2024-11-11 15:52:50,373 INFO L226 Difference]: Without dead ends: 32 [2024-11-11 15:52:50,374 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-11 15:52:50,374 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:52:50,375 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 16 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:52:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-11 15:52:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2024-11-11 15:52:50,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:50,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-11-11 15:52:50,379 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2024-11-11 15:52:50,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:52:50,379 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-11-11 15:52:50,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:50,380 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-11-11 15:52:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-11 15:52:50,380 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:52:50,380 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:52:50,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 15:52:50,380 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:52:50,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:52:50,381 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2024-11-11 15:52:50,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:52:50,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513325075] [2024-11-11 15:52:50,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:52:50,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:52:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 15:52:50,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706819812] [2024-11-11 15:52:50,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:52:50,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:50,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:52:50,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:52:50,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 15:52:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:52:50,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-11 15:52:50,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:52:50,618 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 11 treesize of output 9 [2024-11-11 15:52:50,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-11-11 15:52:50,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-11 15:52:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:52:50,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:52:50,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-11 15:52:50,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-11 15:52:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 15:52:50,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:52:50,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513325075] [2024-11-11 15:52:50,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 15:52:50,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706819812] [2024-11-11 15:52:50,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706819812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:52:50,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 15:52:50,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-11 15:52:50,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924455930] [2024-11-11 15:52:50,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 15:52:50,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-11 15:52:50,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:52:50,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-11 15:52:50,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-11 15:52:50,910 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:52:51,048 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2024-11-11 15:52:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-11 15:52:51,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-11 15:52:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:52:51,049 INFO L225 Difference]: With dead ends: 54 [2024-11-11 15:52:51,049 INFO L226 Difference]: Without dead ends: 52 [2024-11-11 15:52:51,050 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-11 15:52:51,050 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:52:51,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 105 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:52:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-11 15:52:51,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2024-11-11 15:52:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-11-11 15:52:51,055 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2024-11-11 15:52:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:52:51,057 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-11-11 15:52:51,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-11-11 15:52:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-11 15:52:51,058 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:52:51,058 INFO L218 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] [2024-11-11 15:52:51,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-11 15:52:51,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:51,262 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:52:51,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:52:51,262 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2024-11-11 15:52:51,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:52:51,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689840420] [2024-11-11 15:52:51,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:52:51,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:52:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:52:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 15:52:51,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:52:51,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689840420] [2024-11-11 15:52:51,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689840420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:52:51,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410343057] [2024-11-11 15:52:51,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:52:51,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:51,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:52:51,398 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:52:51,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 15:52:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:52:51,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-11 15:52:51,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:52:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 15:52:51,503 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:52:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 15:52:51,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410343057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:52:51,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:52:51,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-11 15:52:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546075452] [2024-11-11 15:52:51,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:52:51,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-11 15:52:51,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:52:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-11 15:52:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-11 15:52:51,557 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:52:51,669 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2024-11-11 15:52:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 15:52:51,669 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 24 [2024-11-11 15:52:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:52:51,670 INFO L225 Difference]: With dead ends: 82 [2024-11-11 15:52:51,670 INFO L226 Difference]: Without dead ends: 48 [2024-11-11 15:52:51,670 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-11 15:52:51,671 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:52:51,671 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 54 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:52:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-11 15:52:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2024-11-11 15:52:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2024-11-11 15:52:51,685 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2024-11-11 15:52:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:52:51,685 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2024-11-11 15:52:51,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2024-11-11 15:52:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-11 15:52:51,686 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:52:51,686 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:52:51,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-11 15:52:51,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-11 15:52:51,887 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:52:51,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:52:51,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1587482582, now seen corresponding path program 2 times [2024-11-11 15:52:51,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:52:51,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290670739] [2024-11-11 15:52:51,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:52:51,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:52:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:52:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:52:52,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:52:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290670739] [2024-11-11 15:52:52,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290670739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:52:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933746384] [2024-11-11 15:52:52,039 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:52:52,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:52,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:52:52,041 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:52:52,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 15:52:52,097 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 15:52:52,097 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:52:52,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-11 15:52:52,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:52:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:52:52,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:52:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:52:52,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933746384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:52:52,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:52:52,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-11 15:52:52,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031570609] [2024-11-11 15:52:52,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:52:52,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 15:52:52,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:52:52,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 15:52:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-11 15:52:52,275 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:52:52,410 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2024-11-11 15:52:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-11 15:52:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-11 15:52:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:52:52,411 INFO L225 Difference]: With dead ends: 100 [2024-11-11 15:52:52,411 INFO L226 Difference]: Without dead ends: 77 [2024-11-11 15:52:52,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-11 15:52:52,414 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:52:52,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 67 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:52:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-11 15:52:52,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2024-11-11 15:52:52,428 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) [2024-11-11 15:52:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2024-11-11 15:52:52,429 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 28 [2024-11-11 15:52:52,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:52:52,430 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2024-11-11 15:52:52,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2024-11-11 15:52:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-11 15:52:52,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:52:52,431 INFO L218 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] [2024-11-11 15:52:52,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-11 15:52:52,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:52,631 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:52:52,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:52:52,632 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 2 times [2024-11-11 15:52:52,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:52:52,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446529775] [2024-11-11 15:52:52,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:52:52,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:52:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 15:52:52,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898956949] [2024-11-11 15:52:52,685 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:52:52,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:52,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:52:52,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:52:52,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 15:52:52,744 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 15:52:52,744 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:52:52,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-11 15:52:52,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:52:52,771 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 11 treesize of output 7 [2024-11-11 15:52:52,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-11 15:52:52,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-11-11 15:52:52,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:52:52,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2024-11-11 15:52:52,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-11 15:52:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:52:52,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:52:53,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-11 15:52:53,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-11 15:52:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:52:53,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:52:53,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446529775] [2024-11-11 15:52:53,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 15:52:53,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898956949] [2024-11-11 15:52:53,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898956949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:52:53,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 15:52:53,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2024-11-11 15:52:53,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708871214] [2024-11-11 15:52:53,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 15:52:53,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-11 15:52:53,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:52:53,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-11 15:52:53,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-11 15:52:53,207 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:53,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:52:53,636 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2024-11-11 15:52:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-11 15:52:53,637 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-11 15:52:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:52:53,638 INFO L225 Difference]: With dead ends: 121 [2024-11-11 15:52:53,638 INFO L226 Difference]: Without dead ends: 100 [2024-11-11 15:52:53,639 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2024-11-11 15:52:53,639 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 15:52:53,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 239 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 15:52:53,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-11 15:52:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 63. [2024-11-11 15:52:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-11-11 15:52:53,655 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 30 [2024-11-11 15:52:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:52:53,656 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-11-11 15:52:53,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-11-11 15:52:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-11 15:52:53,657 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:52:53,657 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:52:53,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-11 15:52:53,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:53,862 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:52:53,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:52:53,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1505554158, now seen corresponding path program 3 times [2024-11-11 15:52:53,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:52:53,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192246440] [2024-11-11 15:52:53,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:52:53,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:52:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 15:52:53,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668250283] [2024-11-11 15:52:53,889 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 15:52:53,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:53,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:52:53,894 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:52:53,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 15:52:53,958 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-11 15:52:53,958 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:52:53,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-11 15:52:53,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:52:53,975 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 11 treesize of output 9 [2024-11-11 15:52:54,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:52:54,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-11 15:52:54,036 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2024-11-11 15:52:54,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2024-11-11 15:52:54,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-11-11 15:52:54,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:52:54,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-11 15:52:54,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:52:54,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-11 15:52:54,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-11 15:52:54,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:52:54,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:52:54,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2024-11-11 15:52:54,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:52:54,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:52:54,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2024-11-11 15:52:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:52:54,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:52:55,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2024-11-11 15:52:55,376 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-11 15:52:55,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1360 treesize of output 1282 [2024-11-11 15:52:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 15:52:55,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:52:55,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192246440] [2024-11-11 15:52:55,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 15:52:55,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668250283] [2024-11-11 15:52:55,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668250283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:52:55,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 15:52:55,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2024-11-11 15:52:55,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888842947] [2024-11-11 15:52:55,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 15:52:55,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-11 15:52:55,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:52:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-11 15:52:55,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2024-11-11 15:52:55,419 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:56,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:52:56,104 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2024-11-11 15:52:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-11 15:52:56,104 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-11 15:52:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:52:56,106 INFO L225 Difference]: With dead ends: 84 [2024-11-11 15:52:56,107 INFO L226 Difference]: Without dead ends: 82 [2024-11-11 15:52:56,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2024-11-11 15:52:56,109 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 97 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 15:52:56,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 170 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 15:52:56,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-11 15:52:56,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2024-11-11 15:52:56,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2024-11-11 15:52:56,122 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 32 [2024-11-11 15:52:56,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:52:56,122 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2024-11-11 15:52:56,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2024-11-11 15:52:56,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-11 15:52:56,123 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:52:56,123 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:52:56,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-11 15:52:56,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:56,324 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:52:56,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:52:56,324 INFO L85 PathProgramCache]: Analyzing trace with hash 399426566, now seen corresponding path program 3 times [2024-11-11 15:52:56,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:52:56,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513722212] [2024-11-11 15:52:56,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:52:56,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:52:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:52:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-11 15:52:56,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:52:56,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513722212] [2024-11-11 15:52:56,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513722212] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:52:56,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124673965] [2024-11-11 15:52:56,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 15:52:56,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:56,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:52:56,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:52:56,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 15:52:56,523 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-11 15:52:56,524 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:52:56,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-11 15:52:56,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:52:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-11 15:52:56,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:52:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-11 15:52:56,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124673965] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:52:56,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:52:56,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-11 15:52:56,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93652228] [2024-11-11 15:52:56,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:52:56,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 15:52:56,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:52:56,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 15:52:56,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-11 15:52:56,640 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:52:56,763 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2024-11-11 15:52:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 15:52:56,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 38 [2024-11-11 15:52:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:52:56,764 INFO L225 Difference]: With dead ends: 82 [2024-11-11 15:52:56,764 INFO L226 Difference]: Without dead ends: 73 [2024-11-11 15:52:56,764 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-11-11 15:52:56,765 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:52:56,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 65 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:52:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-11 15:52:56,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2024-11-11 15:52:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 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) [2024-11-11 15:52:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2024-11-11 15:52:56,771 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 38 [2024-11-11 15:52:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:52:56,771 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2024-11-11 15:52:56,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2024-11-11 15:52:56,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-11 15:52:56,772 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:52:56,772 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:52:56,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-11 15:52:56,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:56,973 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:52:56,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:52:56,973 INFO L85 PathProgramCache]: Analyzing trace with hash -441278722, now seen corresponding path program 4 times [2024-11-11 15:52:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:52:56,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165401561] [2024-11-11 15:52:56,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:52:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:52:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 15:52:57,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905408447] [2024-11-11 15:52:57,005 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 15:52:57,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:57,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:52:57,006 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:52:57,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-11 15:52:57,065 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 15:52:57,065 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:52:57,071 WARN L254 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-11 15:52:57,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:52:57,078 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 15 [2024-11-11 15:52:57,131 INFO L349 Elim1Store]: treesize reduction 22, result has 42.1 percent of original size [2024-11-11 15:52:57,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2024-11-11 15:52:57,176 INFO L349 Elim1Store]: treesize reduction 24, result has 40.0 percent of original size [2024-11-11 15:52:57,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2024-11-11 15:52:57,238 INFO L349 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2024-11-11 15:52:57,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 45 [2024-11-11 15:52:57,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:52:57,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 29 treesize of output 24 [2024-11-11 15:52:57,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:52:57,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 33 treesize of output 26 [2024-11-11 15:52:57,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2024-11-11 15:52:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:52:57,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:52:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:52:58,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:52:58,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165401561] [2024-11-11 15:52:58,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 15:52:58,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905408447] [2024-11-11 15:52:58,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905408447] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:52:58,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 15:52:58,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 42 [2024-11-11 15:52:58,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427632016] [2024-11-11 15:52:58,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 15:52:58,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-11 15:52:58,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:52:58,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-11 15:52:58,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2024-11-11 15:52:58,143 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 42 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 42 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:52:59,711 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2024-11-11 15:52:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-11 15:52:59,711 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 42 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-11 15:52:59,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:52:59,713 INFO L225 Difference]: With dead ends: 161 [2024-11-11 15:52:59,713 INFO L226 Difference]: Without dead ends: 159 [2024-11-11 15:52:59,714 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=698, Invalid=4852, Unknown=0, NotChecked=0, Total=5550 [2024-11-11 15:52:59,715 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 164 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 15:52:59,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 452 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-11 15:52:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-11 15:52:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 82. [2024-11-11 15:52:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 81 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2024-11-11 15:52:59,733 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 40 [2024-11-11 15:52:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:52:59,734 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2024-11-11 15:52:59,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 42 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:52:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2024-11-11 15:52:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-11 15:52:59,734 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:52:59,734 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:52:59,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-11 15:52:59,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:52:59,941 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:52:59,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:52:59,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1026077188, now seen corresponding path program 5 times [2024-11-11 15:52:59,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:52:59,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016918513] [2024-11-11 15:52:59,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:52:59,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:52:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:53:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-11 15:53:00,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:53:00,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016918513] [2024-11-11 15:53:00,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016918513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:53:00,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201936901] [2024-11-11 15:53:00,098 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 15:53:00,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:53:00,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:53:00,100 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:53:00,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-11 15:53:00,215 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-11 15:53:00,216 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:53:00,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-11 15:53:00,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:53:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-11 15:53:00,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:53:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-11 15:53:00,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201936901] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:53:00,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:53:00,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2024-11-11 15:53:00,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60034878] [2024-11-11 15:53:00,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:53:00,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-11 15:53:00,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:53:00,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-11 15:53:00,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-11-11 15:53:00,335 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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) [2024-11-11 15:53:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:53:00,453 INFO L93 Difference]: Finished difference Result 190 states and 210 transitions. [2024-11-11 15:53:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-11 15:53:00,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 40 [2024-11-11 15:53:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:53:00,454 INFO L225 Difference]: With dead ends: 190 [2024-11-11 15:53:00,454 INFO L226 Difference]: Without dead ends: 106 [2024-11-11 15:53:00,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2024-11-11 15:53:00,455 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 108 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:53:00,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 88 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:53:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-11 15:53:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2024-11-11 15:53:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:53:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2024-11-11 15:53:00,464 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 40 [2024-11-11 15:53:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:53:00,465 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2024-11-11 15:53:00,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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) [2024-11-11 15:53:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2024-11-11 15:53:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-11 15:53:00,465 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:53:00,465 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:53:00,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-11 15:53:00,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-11 15:53:00,666 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:53:00,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:53:00,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2076403198, now seen corresponding path program 6 times [2024-11-11 15:53:00,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:53:00,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7476967] [2024-11-11 15:53:00,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:53:00,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:53:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:53:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-11 15:53:00,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:53:00,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7476967] [2024-11-11 15:53:00,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7476967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:53:00,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641484829] [2024-11-11 15:53:00,801 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-11 15:53:00,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:53:00,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:53:00,803 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:53:00,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-11 15:53:00,921 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-11 15:53:00,921 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:53:00,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-11 15:53:00,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:53:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-11 15:53:01,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:53:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-11 15:53:01,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641484829] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:53:01,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:53:01,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 27 [2024-11-11 15:53:01,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508085713] [2024-11-11 15:53:01,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:53:01,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-11 15:53:01,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:53:01,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-11 15:53:01,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2024-11-11 15:53:01,125 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 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) [2024-11-11 15:53:01,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:53:01,452 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2024-11-11 15:53:01,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-11 15:53:01,453 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 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) Word has length 42 [2024-11-11 15:53:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:53:01,454 INFO L225 Difference]: With dead ends: 168 [2024-11-11 15:53:01,454 INFO L226 Difference]: Without dead ends: 126 [2024-11-11 15:53:01,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=361, Invalid=1709, Unknown=0, NotChecked=0, Total=2070 [2024-11-11 15:53:01,455 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 374 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 15:53:01,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 177 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 15:53:01,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-11 15:53:01,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 91. [2024-11-11 15:53:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1) internal successors, (99), 90 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:53:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2024-11-11 15:53:01,468 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 42 [2024-11-11 15:53:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:53:01,469 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2024-11-11 15:53:01,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 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) [2024-11-11 15:53:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2024-11-11 15:53:01,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-11 15:53:01,473 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:53:01,473 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:53:01,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-11 15:53:01,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:53:01,677 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:53:01,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:53:01,677 INFO L85 PathProgramCache]: Analyzing trace with hash -452760008, now seen corresponding path program 7 times [2024-11-11 15:53:01,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:53:01,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033951917] [2024-11-11 15:53:01,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:53:01,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:53:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 15:53:01,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465239313] [2024-11-11 15:53:01,711 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-11 15:53:01,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:53:01,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:53:01,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:53:01,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-11 15:53:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:53:01,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-11 15:53:01,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:53:01,798 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 11 treesize of output 9 [2024-11-11 15:53:01,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-11 15:53:01,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-11 15:53:01,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:53:01,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2024-11-11 15:53:01,935 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:53:01,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2024-11-11 15:53:01,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:53:01,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2024-11-11 15:53:01,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:53:01,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2024-11-11 15:53:02,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:53:02,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2024-11-11 15:53:02,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:53:02,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2024-11-11 15:53:02,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:53:02,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 32 [2024-11-11 15:53:02,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:53:02,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2024-11-11 15:53:02,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:53:02,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:53:02,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:53:02,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 32 [2024-11-11 15:53:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:53:02,320 INFO L312 TraceCheckSpWp]: Computing backward predicates...