./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/max-2-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-multidimensional/max-2-u.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 d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 10:05:18,397 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 10:05:18,460 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 10:05:18,465 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 10:05:18,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 10:05:18,481 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 10:05:18,482 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 10:05:18,482 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 10:05:18,482 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 10:05:18,482 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 10:05:18,483 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 10:05:18,483 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 10:05:18,483 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 10:05:18,484 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 10:05:18,484 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 10:05:18,484 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 10:05:18,485 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 10:05:18,485 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 10:05:18,485 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 10:05:18,485 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 10:05:18,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 10:05:18,488 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 10:05:18,488 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 10:05:18,488 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 10:05:18,488 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 10:05:18,489 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 10:05:18,489 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 10:05:18,489 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 10:05:18,489 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 10:05:18,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 10:05:18,489 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 10:05:18,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 10:05:18,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:05:18,490 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 10:05:18,490 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 10:05:18,490 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 10:05:18,490 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 10:05:18,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 10:05:18,491 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 10:05:18,491 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 10:05:18,491 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 10:05:18,492 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 10:05:18,493 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f [2024-11-08 10:05:18,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 10:05:18,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 10:05:18,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 10:05:18,725 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 10:05:18,726 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 10:05:18,726 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/max-2-u.c [2024-11-08 10:05:19,883 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 10:05:20,024 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 10:05:20,025 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-2-u.c [2024-11-08 10:05:20,030 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16d625eb9/7aa28da4550a42c9ae61e2ca8f0c4ae9/FLAG94f97fb4b [2024-11-08 10:05:20,456 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16d625eb9/7aa28da4550a42c9ae61e2ca8f0c4ae9 [2024-11-08 10:05:20,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 10:05:20,459 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 10:05:20,461 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 10:05:20,461 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 10:05:20,465 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 10:05:20,465 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,466 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d775ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20, skipping insertion in model container [2024-11-08 10:05:20,466 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,479 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 10:05:20,600 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-multidimensional/max-2-u.c[319,332] [2024-11-08 10:05:20,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:05:20,618 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 10:05:20,626 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-multidimensional/max-2-u.c[319,332] [2024-11-08 10:05:20,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:05:20,646 INFO L204 MainTranslator]: Completed translation [2024-11-08 10:05:20,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20 WrapperNode [2024-11-08 10:05:20,647 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 10:05:20,648 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 10:05:20,648 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 10:05:20,648 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 10:05:20,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,659 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,672 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2024-11-08 10:05:20,673 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 10:05:20,673 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 10:05:20,673 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 10:05:20,673 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 10:05:20,680 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,681 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,689 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-08 10:05:20,690 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,690 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,693 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,695 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,696 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 10:05:20,700 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 10:05:20,700 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 10:05:20,700 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 10:05:20,701 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (1/1) ... [2024-11-08 10:05:20,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:05:20,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:05:20,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 10:05:20,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 10:05:20,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 10:05:20,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 10:05:20,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 10:05:20,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 10:05:20,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 10:05:20,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 10:05:20,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 10:05:20,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 10:05:20,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 10:05:20,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 10:05:20,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 10:05:20,820 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 10:05:20,822 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 10:05:21,013 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-11-08 10:05:21,013 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 10:05:21,027 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 10:05:21,029 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-08 10:05:21,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:05:21 BoogieIcfgContainer [2024-11-08 10:05:21,029 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 10:05:21,032 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 10:05:21,033 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 10:05:21,035 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 10:05:21,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 10:05:20" (1/3) ... [2024-11-08 10:05:21,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268fb30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:05:21, skipping insertion in model container [2024-11-08 10:05:21,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:05:20" (2/3) ... [2024-11-08 10:05:21,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268fb30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:05:21, skipping insertion in model container [2024-11-08 10:05:21,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:05:21" (3/3) ... [2024-11-08 10:05:21,038 INFO L112 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2024-11-08 10:05:21,051 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 10:05:21,052 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 10:05:21,101 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 10:05:21,106 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;@199012c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 10:05:21,106 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 10:05:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 10:05:21,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:05:21,113 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:05:21,114 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:05:21,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:05:21,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1824316411, now seen corresponding path program 1 times [2024-11-08 10:05:21,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:05:21,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247488816] [2024-11-08 10:05:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:05:21,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:05:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:05:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:05:21,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:05:21,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247488816] [2024-11-08 10:05:21,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247488816] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:05:21,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:05:21,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 10:05:21,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177062826] [2024-11-08 10:05:21,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:05:21,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 10:05:21,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:05:21,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 10:05:21,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 10:05:21,328 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:21,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:05:21,364 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2024-11-08 10:05:21,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 10:05:21,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 10:05:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:05:21,370 INFO L225 Difference]: With dead ends: 47 [2024-11-08 10:05:21,371 INFO L226 Difference]: Without dead ends: 22 [2024-11-08 10:05:21,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 10:05:21,375 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:05:21,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:05:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-08 10:05:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-11-08 10:05:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-11-08 10:05:21,403 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2024-11-08 10:05:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:05:21,403 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-08 10:05:21,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2024-11-08 10:05:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-08 10:05:21,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:05:21,404 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:05:21,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 10:05:21,405 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:05:21,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:05:21,405 INFO L85 PathProgramCache]: Analyzing trace with hash 435710502, now seen corresponding path program 1 times [2024-11-08 10:05:21,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:05:21,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706163918] [2024-11-08 10:05:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:05:21,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:05:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:05:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:05:21,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:05:21,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706163918] [2024-11-08 10:05:21,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706163918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:05:21,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:05:21,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 10:05:21,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856589742] [2024-11-08 10:05:21,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:05:21,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 10:05:21,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:05:21,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 10:05:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:05:21,495 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:21,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:05:21,544 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2024-11-08 10:05:21,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 10:05:21,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-08 10:05:21,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:05:21,545 INFO L225 Difference]: With dead ends: 46 [2024-11-08 10:05:21,546 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 10:05:21,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:05:21,547 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:05:21,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:05:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 10:05:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2024-11-08 10:05:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2024-11-08 10:05:21,556 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2024-11-08 10:05:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:05:21,557 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2024-11-08 10:05:21,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:21,557 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2024-11-08 10:05:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 10:05:21,557 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:05:21,557 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:05:21,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 10:05:21,558 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:05:21,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:05:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash -263900950, now seen corresponding path program 1 times [2024-11-08 10:05:21,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:05:21,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653380563] [2024-11-08 10:05:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:05:21,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:05:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:05:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 10:05:21,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:05:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653380563] [2024-11-08 10:05:21,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653380563] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:05:21,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:05:21,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 10:05:21,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869022425] [2024-11-08 10:05:21,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:05:21,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 10:05:21,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:05:21,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 10:05:21,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:05:21,623 INFO L87 Difference]: Start difference. First operand 23 states and 29 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) [2024-11-08 10:05:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:05:21,679 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2024-11-08 10:05:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 10:05:21,680 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 [2024-11-08 10:05:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:05:21,681 INFO L225 Difference]: With dead ends: 49 [2024-11-08 10:05:21,681 INFO L226 Difference]: Without dead ends: 40 [2024-11-08 10:05:21,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:05:21,682 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:05:21,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:05:21,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-08 10:05:21,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2024-11-08 10:05:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-11-08 10:05:21,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 14 [2024-11-08 10:05:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:05:21,689 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-08 10:05:21,689 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) [2024-11-08 10:05:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-11-08 10:05:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 10:05:21,690 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:05:21,690 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:05:21,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 10:05:21,690 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:05:21,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:05:21,691 INFO L85 PathProgramCache]: Analyzing trace with hash -359141244, now seen corresponding path program 1 times [2024-11-08 10:05:21,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:05:21,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214829087] [2024-11-08 10:05:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:05:21,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:05:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:05:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 10:05:21,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:05:21,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214829087] [2024-11-08 10:05:21,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214829087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:05:21,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15106024] [2024-11-08 10:05:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:05:21,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:21,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:05:21,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:05:21,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 10:05:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:05:21,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 10:05:21,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:05:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 10:05:21,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:05:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 10:05:21,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15106024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:05:21,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:05:21,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-08 10:05:21,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808379873] [2024-11-08 10:05:21,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:05:21,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 10:05:21,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:05:21,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 10:05:21,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-08 10:05:21,964 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:22,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:05:22,068 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2024-11-08 10:05:22,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 10:05:22,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2024-11-08 10:05:22,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:05:22,070 INFO L225 Difference]: With dead ends: 72 [2024-11-08 10:05:22,070 INFO L226 Difference]: Without dead ends: 51 [2024-11-08 10:05:22,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-11-08 10:05:22,071 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 103 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:05:22,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 49 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:05:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-08 10:05:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-11-08 10:05:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 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) [2024-11-08 10:05:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2024-11-08 10:05:22,086 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 20 [2024-11-08 10:05:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:05:22,086 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2024-11-08 10:05:22,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2024-11-08 10:05:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-08 10:05:22,087 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:05:22,087 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:05:22,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 10:05:22,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:22,288 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:05:22,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:05:22,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1223950390, now seen corresponding path program 2 times [2024-11-08 10:05:22,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:05:22,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776908125] [2024-11-08 10:05:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:05:22,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:05:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:05:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-08 10:05:22,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:05:22,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776908125] [2024-11-08 10:05:22,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776908125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:05:22,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141407625] [2024-11-08 10:05:22,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:05:22,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:22,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:05:22,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:05:22,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 10:05:22,501 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:05:22,501 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:05:22,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 10:05:22,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:05:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-08 10:05:22,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:05:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-08 10:05:22,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141407625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:05:22,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:05:22,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-08 10:05:22,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350992436] [2024-11-08 10:05:22,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:05:22,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 10:05:22,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:05:22,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 10:05:22,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2024-11-08 10:05:22,664 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:22,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:05:22,858 INFO L93 Difference]: Finished difference Result 147 states and 192 transitions. [2024-11-08 10:05:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 10:05:22,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-08 10:05:22,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:05:22,862 INFO L225 Difference]: With dead ends: 147 [2024-11-08 10:05:22,862 INFO L226 Difference]: Without dead ends: 105 [2024-11-08 10:05:22,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2024-11-08 10:05:22,863 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 206 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:05:22,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 101 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:05:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-08 10:05:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2024-11-08 10:05:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 86 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2024-11-08 10:05:22,879 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 32 [2024-11-08 10:05:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:05:22,879 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2024-11-08 10:05:22,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:22,880 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2024-11-08 10:05:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 10:05:22,882 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:05:22,882 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:05:22,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 10:05:23,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:23,084 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:05:23,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:05:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash 307149302, now seen corresponding path program 3 times [2024-11-08 10:05:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:05:23,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150162343] [2024-11-08 10:05:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:05:23,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:05:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:05:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2024-11-08 10:05:23,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:05:23,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150162343] [2024-11-08 10:05:23,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150162343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:05:23,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839148338] [2024-11-08 10:05:23,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:05:23,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:23,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:05:23,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:05:23,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 10:05:23,470 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 10:05:23,470 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:05:23,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 10:05:23,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:05:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2024-11-08 10:05:23,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:05:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2024-11-08 10:05:23,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839148338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:05:23,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:05:23,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2024-11-08 10:05:23,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542977122] [2024-11-08 10:05:23,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:05:23,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 10:05:23,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:05:23,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 10:05:23,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2024-11-08 10:05:23,737 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:24,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:05:24,841 INFO L93 Difference]: Finished difference Result 560 states and 666 transitions. [2024-11-08 10:05:24,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-08 10:05:24,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-08 10:05:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:05:24,844 INFO L225 Difference]: With dead ends: 560 [2024-11-08 10:05:24,844 INFO L226 Difference]: Without dead ends: 476 [2024-11-08 10:05:24,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1772, Invalid=3778, Unknown=0, NotChecked=0, Total=5550 [2024-11-08 10:05:24,846 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 1606 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1606 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:05:24,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1606 Valid, 80 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:05:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2024-11-08 10:05:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 202. [2024-11-08 10:05:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.3134328358208955) internal successors, (264), 201 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 264 transitions. [2024-11-08 10:05:24,866 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 264 transitions. Word has length 56 [2024-11-08 10:05:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:05:24,866 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 264 transitions. [2024-11-08 10:05:24,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:24,866 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 264 transitions. [2024-11-08 10:05:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-11-08 10:05:24,870 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:05:24,870 INFO L215 NwaCegarLoop]: trace histogram [44, 44, 44, 11, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:05:24,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 10:05:25,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:25,075 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:05:25,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:05:25,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1110745042, now seen corresponding path program 4 times [2024-11-08 10:05:25,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:05:25,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055638600] [2024-11-08 10:05:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:05:25,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:05:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:05:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3103 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 3036 trivial. 0 not checked. [2024-11-08 10:05:25,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:05:25,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055638600] [2024-11-08 10:05:25,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055638600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:05:25,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050292802] [2024-11-08 10:05:25,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:05:25,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:25,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:05:25,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:05:25,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 10:05:25,562 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:05:25,562 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:05:25,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 10:05:25,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:05:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3103 backedges. 145 proven. 2363 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2024-11-08 10:05:26,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:05:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3103 backedges. 145 proven. 2363 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2024-11-08 10:05:26,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050292802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:05:26,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:05:26,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 49 [2024-11-08 10:05:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460856314] [2024-11-08 10:05:26,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:05:26,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-08 10:05:26,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:05:26,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-08 10:05:26,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1895, Unknown=0, NotChecked=0, Total=2352 [2024-11-08 10:05:26,507 INFO L87 Difference]: Start difference. First operand 202 states and 264 transitions. Second operand has 49 states, 49 states have (on average 3.020408163265306) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:31,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:05:31,626 INFO L93 Difference]: Finished difference Result 1573 states and 1865 transitions. [2024-11-08 10:05:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2024-11-08 10:05:31,626 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.020408163265306) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 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 168 [2024-11-08 10:05:31,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:05:31,630 INFO L225 Difference]: With dead ends: 1573 [2024-11-08 10:05:31,630 INFO L226 Difference]: Without dead ends: 1374 [2024-11-08 10:05:31,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16287 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=9701, Invalid=33771, Unknown=0, NotChecked=0, Total=43472 [2024-11-08 10:05:31,640 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 6702 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 1059 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6702 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1059 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 10:05:31,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6702 Valid, 562 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1059 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 10:05:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2024-11-08 10:05:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 491. [2024-11-08 10:05:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.3244897959183672) internal successors, (649), 490 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 649 transitions. [2024-11-08 10:05:31,680 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 649 transitions. Word has length 168 [2024-11-08 10:05:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:05:31,681 INFO L471 AbstractCegarLoop]: Abstraction has 491 states and 649 transitions. [2024-11-08 10:05:31,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.020408163265306) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 649 transitions. [2024-11-08 10:05:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2024-11-08 10:05:31,685 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:05:31,686 INFO L215 NwaCegarLoop]: trace histogram [132, 132, 132, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:05:31,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 10:05:31,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:31,886 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:05:31,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:05:31,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1350395702, now seen corresponding path program 5 times [2024-11-08 10:05:31,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:05:31,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254307585] [2024-11-08 10:05:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:05:31,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:05:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:05:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 27645 backedges. 1 proven. 78 refuted. 0 times theorem prover too weak. 27566 trivial. 0 not checked. [2024-11-08 10:05:32,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:05:32,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254307585] [2024-11-08 10:05:32,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254307585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:05:32,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147847188] [2024-11-08 10:05:32,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:05:32,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:32,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:05:32,688 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:05:32,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 10:05:43,819 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 117 check-sat command(s) [2024-11-08 10:05:43,820 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:05:43,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 10:05:43,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:05:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 27645 backedges. 11927 proven. 210 refuted. 0 times theorem prover too weak. 15508 trivial. 0 not checked. [2024-11-08 10:05:44,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:05:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 27645 backedges. 11013 proven. 1124 refuted. 0 times theorem prover too weak. 15508 trivial. 0 not checked. [2024-11-08 10:05:44,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147847188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:05:44,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:05:44,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2024-11-08 10:05:44,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464156109] [2024-11-08 10:05:44,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:05:44,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-08 10:05:44,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:05:44,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-08 10:05:44,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=1019, Unknown=0, NotChecked=0, Total=1806 [2024-11-08 10:05:44,428 INFO L87 Difference]: Start difference. First operand 491 states and 649 transitions. Second operand has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:05:44,850 INFO L93 Difference]: Finished difference Result 1547 states and 2188 transitions. [2024-11-08 10:05:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-08 10:05:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 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 454 [2024-11-08 10:05:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:05:44,855 INFO L225 Difference]: With dead ends: 1547 [2024-11-08 10:05:44,855 INFO L226 Difference]: Without dead ends: 1059 [2024-11-08 10:05:44,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1190, Invalid=1890, Unknown=0, NotChecked=0, Total=3080 [2024-11-08 10:05:44,857 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 532 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:05:44,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 170 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:05:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2024-11-08 10:05:44,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1009. [2024-11-08 10:05:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 1.3244047619047619) internal successors, (1335), 1008 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1335 transitions. [2024-11-08 10:05:44,901 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1335 transitions. Word has length 454 [2024-11-08 10:05:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:05:44,902 INFO L471 AbstractCegarLoop]: Abstraction has 1009 states and 1335 transitions. [2024-11-08 10:05:44,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1335 transitions. [2024-11-08 10:05:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 931 [2024-11-08 10:05:44,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:05:44,914 INFO L215 NwaCegarLoop]: trace histogram [286, 286, 286, 26, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:05:44,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 10:05:45,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:45,115 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:05:45,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:05:45,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2071027210, now seen corresponding path program 6 times [2024-11-08 10:05:45,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:05:45,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859529265] [2024-11-08 10:05:45,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:05:45,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:05:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:05:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 125939 backedges. 1 proven. 351 refuted. 0 times theorem prover too weak. 125587 trivial. 0 not checked. [2024-11-08 10:05:47,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:05:47,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859529265] [2024-11-08 10:05:47,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859529265] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:05:47,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239383059] [2024-11-08 10:05:47,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:05:47,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:47,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:05:47,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:05:47,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 10:05:47,433 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-08 10:05:47,433 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:05:47,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 10:05:47,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:05:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 125939 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 125938 trivial. 0 not checked. [2024-11-08 10:05:47,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:05:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 125939 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 125938 trivial. 0 not checked. [2024-11-08 10:05:47,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239383059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:05:47,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:05:47,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 4, 4] total 34 [2024-11-08 10:05:47,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696954454] [2024-11-08 10:05:47,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:05:47,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-08 10:05:47,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:05:47,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-08 10:05:47,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=699, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 10:05:47,614 INFO L87 Difference]: Start difference. First operand 1009 states and 1335 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 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) [2024-11-08 10:05:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:05:51,038 INFO L93 Difference]: Finished difference Result 2220 states and 2891 transitions. [2024-11-08 10:05:51,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2024-11-08 10:05:51,039 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 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 930 [2024-11-08 10:05:51,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:05:51,042 INFO L225 Difference]: With dead ends: 2220 [2024-11-08 10:05:51,042 INFO L226 Difference]: Without dead ends: 1214 [2024-11-08 10:05:51,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2026 GetRequests, 1856 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9771 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8787, Invalid=20625, Unknown=0, NotChecked=0, Total=29412 [2024-11-08 10:05:51,046 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 1084 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:05:51,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 147 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:05:51,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2024-11-08 10:05:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1136. [2024-11-08 10:05:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 1.3013215859030838) internal successors, (1477), 1135 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1477 transitions. [2024-11-08 10:05:51,124 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1477 transitions. Word has length 930 [2024-11-08 10:05:51,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:05:51,125 INFO L471 AbstractCegarLoop]: Abstraction has 1136 states and 1477 transitions. [2024-11-08 10:05:51,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 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) [2024-11-08 10:05:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1477 transitions. [2024-11-08 10:05:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1055 [2024-11-08 10:05:51,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:05:51,142 INFO L215 NwaCegarLoop]: trace histogram [297, 297, 297, 108, 11, 11, 11, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:05:51,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 10:05:51,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:51,343 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:05:51,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:05:51,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1033210347, now seen corresponding path program 7 times [2024-11-08 10:05:51,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:05:51,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960038538] [2024-11-08 10:05:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:05:51,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:05:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:05:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 141543 backedges. 2356 proven. 378 refuted. 0 times theorem prover too weak. 138809 trivial. 0 not checked. [2024-11-08 10:05:53,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:05:53,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960038538] [2024-11-08 10:05:53,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960038538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:05:53,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88749752] [2024-11-08 10:05:53,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 10:05:53,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:53,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:05:53,733 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:05:53,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 10:05:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:05:54,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 3504 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-08 10:05:54,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:05:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 141543 backedges. 2356 proven. 378 refuted. 0 times theorem prover too weak. 138809 trivial. 0 not checked. [2024-11-08 10:05:54,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:05:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 141543 backedges. 2356 proven. 378 refuted. 0 times theorem prover too weak. 138809 trivial. 0 not checked. [2024-11-08 10:05:55,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88749752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:05:55,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:05:55,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 88 [2024-11-08 10:05:55,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463568061] [2024-11-08 10:05:55,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:05:55,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-08 10:05:55,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:05:55,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-08 10:05:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3367, Invalid=4289, Unknown=0, NotChecked=0, Total=7656 [2024-11-08 10:05:55,543 INFO L87 Difference]: Start difference. First operand 1136 states and 1477 transitions. Second operand has 88 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 88 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:05:57,202 INFO L93 Difference]: Finished difference Result 3511 states and 4949 transitions. [2024-11-08 10:05:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-08 10:05:57,202 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 88 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1054 [2024-11-08 10:05:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:05:57,208 INFO L225 Difference]: With dead ends: 3511 [2024-11-08 10:05:57,208 INFO L226 Difference]: Without dead ends: 2406 [2024-11-08 10:05:57,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2165 GetRequests, 2051 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4757 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5075, Invalid=8265, Unknown=0, NotChecked=0, Total=13340 [2024-11-08 10:05:57,210 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 2242 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2242 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:05:57,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2242 Valid, 346 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 10:05:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2024-11-08 10:05:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2296. [2024-11-08 10:05:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 1.3006535947712419) internal successors, (2985), 2295 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 2985 transitions. [2024-11-08 10:05:57,335 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 2985 transitions. Word has length 1054 [2024-11-08 10:05:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:05:57,335 INFO L471 AbstractCegarLoop]: Abstraction has 2296 states and 2985 transitions. [2024-11-08 10:05:57,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 88 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:05:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 2985 transitions. [2024-11-08 10:05:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2128 [2024-11-08 10:05:57,354 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:05:57,355 INFO L215 NwaCegarLoop]: trace histogram [616, 616, 616, 224, 11, 11, 11, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:05:57,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 10:05:57,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:05:57,555 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:05:57,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:05:57,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1477123519, now seen corresponding path program 8 times [2024-11-08 10:05:57,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:05:57,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181419344] [2024-11-08 10:05:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:05:57,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:05:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:06:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 601106 backedges. 9751 proven. 1596 refuted. 0 times theorem prover too weak. 589759 trivial. 0 not checked. [2024-11-08 10:06:07,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:06:07,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181419344] [2024-11-08 10:06:07,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181419344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:06:07,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318206915] [2024-11-08 10:06:07,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:06:07,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:06:07,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:06:07,504 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:06:07,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 10:06:08,435 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:06:08,436 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:06:08,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 7100 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-08 10:06:08,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:06:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 601106 backedges. 9751 proven. 1596 refuted. 0 times theorem prover too weak. 589759 trivial. 0 not checked. [2024-11-08 10:06:09,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:06:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 601106 backedges. 9751 proven. 1596 refuted. 0 times theorem prover too weak. 589759 trivial. 0 not checked. [2024-11-08 10:06:12,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318206915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:06:12,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:06:12,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 175 [2024-11-08 10:06:12,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271495164] [2024-11-08 10:06:12,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:06:12,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2024-11-08 10:06:12,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:06:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2024-11-08 10:06:12,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13459, Invalid=16991, Unknown=0, NotChecked=0, Total=30450 [2024-11-08 10:06:12,624 INFO L87 Difference]: Start difference. First operand 2296 states and 2985 transitions. Second operand has 175 states, 175 states have (on average 1.1142857142857143) internal successors, (195), 175 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:06:22,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:06:22,132 INFO L93 Difference]: Finished difference Result 7078 states and 9966 transitions. [2024-11-08 10:06:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2024-11-08 10:06:22,132 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 1.1142857142857143) internal successors, (195), 175 states have internal predecessors, (195), 0 states have call successors, (0), 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 2127 [2024-11-08 10:06:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:06:22,144 INFO L225 Difference]: With dead ends: 7078 [2024-11-08 10:06:22,144 INFO L226 Difference]: Without dead ends: 4842 [2024-11-08 10:06:22,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4369 GetRequests, 4139 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19605 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=20242, Invalid=33350, Unknown=0, NotChecked=0, Total=53592 [2024-11-08 10:06:22,149 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 4067 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 1111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4067 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1111 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 10:06:22,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4067 Valid, 618 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1111 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 10:06:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4842 states. [2024-11-08 10:06:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4842 to 4616. [2024-11-08 10:06:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 1.3003250270855904) internal successors, (6001), 4615 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:06:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 6001 transitions. [2024-11-08 10:06:22,399 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 6001 transitions. Word has length 2127 [2024-11-08 10:06:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:06:22,400 INFO L471 AbstractCegarLoop]: Abstraction has 4616 states and 6001 transitions. [2024-11-08 10:06:22,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 1.1142857142857143) internal successors, (195), 175 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:06:22,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 6001 transitions. [2024-11-08 10:06:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4274 [2024-11-08 10:06:22,465 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:06:22,466 INFO L215 NwaCegarLoop]: trace histogram [1254, 1254, 1254, 456, 11, 11, 11, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:06:22,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 10:06:22,666 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,SelfDestructingSolverStorable10 [2024-11-08 10:06:22,667 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:06:22,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:06:22,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1906823105, now seen corresponding path program 9 times [2024-11-08 10:06:22,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:06:22,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934775791] [2024-11-08 10:06:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:06:22,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:06:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat