./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_palindrome_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc 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-examples/standard_palindrome_ground.i -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 270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 08:56:21,033 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 08:56:21,093 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 08:56:21,099 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 08:56:21,100 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 08:56:21,123 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 08:56:21,123 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 08:56:21,123 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 08:56:21,124 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 08:56:21,124 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 08:56:21,125 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 08:56:21,125 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 08:56:21,127 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 08:56:21,128 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 08:56:21,128 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 08:56:21,129 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 08:56:21,129 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 08:56:21,130 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 08:56:21,130 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 08:56:21,130 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 08:56:21,131 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 08:56:21,131 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 08:56:21,131 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 08:56:21,132 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 08:56:21,132 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 08:56:21,132 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 08:56:21,133 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 08:56:21,133 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 08:56:21,133 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 08:56:21,133 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 08:56:21,134 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 08:56:21,134 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 08:56:21,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 08:56:21,135 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 08:56:21,135 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 08:56:21,135 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 08:56:21,136 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 08:56:21,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 08:56:21,136 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 08:56:21,136 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 08:56:21,137 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 08:56:21,137 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 08:56:21,137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6 [2024-11-18 08:56:21,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 08:56:21,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 08:56:21,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 08:56:21,417 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 08:56:21,417 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 08:56:21,418 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_palindrome_ground.i [2024-11-18 08:56:22,915 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 08:56:23,096 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 08:56:23,097 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_palindrome_ground.i [2024-11-18 08:56:23,105 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/156f0e121/88cb904590b64ccdabe0f7f519cc8db1/FLAG15512945e [2024-11-18 08:56:23,484 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/156f0e121/88cb904590b64ccdabe0f7f519cc8db1 [2024-11-18 08:56:23,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 08:56:23,488 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 08:56:23,489 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 08:56:23,489 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 08:56:23,494 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 08:56:23,495 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,498 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@564e8b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23, skipping insertion in model container [2024-11-18 08:56:23,498 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,517 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 08:56:23,688 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-examples/standard_palindrome_ground.i[819,832] [2024-11-18 08:56:23,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 08:56:23,708 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 08:56:23,720 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-examples/standard_palindrome_ground.i[819,832] [2024-11-18 08:56:23,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 08:56:23,761 INFO L204 MainTranslator]: Completed translation [2024-11-18 08:56:23,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23 WrapperNode [2024-11-18 08:56:23,761 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 08:56:23,762 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 08:56:23,762 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 08:56:23,762 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 08:56:23,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,807 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2024-11-18 08:56:23,808 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 08:56:23,809 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 08:56:23,809 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 08:56:23,809 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 08:56:23,817 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,819 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,830 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 2 writes are split as follows [0, 2]. [2024-11-18 08:56:23,831 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,831 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,835 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,838 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,839 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,840 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,842 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 08:56:23,843 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 08:56:23,843 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 08:56:23,843 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 08:56:23,844 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (1/1) ... [2024-11-18 08:56:23,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 08:56:23,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:56:23,872 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) [2024-11-18 08:56:23,874 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 [2024-11-18 08:56:23,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 08:56:23,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 08:56:23,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 08:56:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 08:56:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 08:56:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 08:56:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 08:56:23,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 08:56:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 08:56:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 08:56:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 08:56:23,971 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 08:56:23,973 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 08:56:24,114 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-18 08:56:24,114 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 08:56:24,124 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 08:56:24,124 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-18 08:56:24,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:56:24 BoogieIcfgContainer [2024-11-18 08:56:24,125 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 08:56:24,127 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 08:56:24,127 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 08:56:24,130 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 08:56:24,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:56:23" (1/3) ... [2024-11-18 08:56:24,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c0b53b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:56:24, skipping insertion in model container [2024-11-18 08:56:24,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:23" (2/3) ... [2024-11-18 08:56:24,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c0b53b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:56:24, skipping insertion in model container [2024-11-18 08:56:24,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:56:24" (3/3) ... [2024-11-18 08:56:24,133 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_palindrome_ground.i [2024-11-18 08:56:24,146 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 08:56:24,147 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 08:56:24,198 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 08:56:24,203 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;@322e56a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 08:56:24,203 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 08:56:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:24,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-18 08:56:24,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:56:24,212 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:56:24,212 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:56:24,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:56:24,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2024-11-18 08:56:24,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:56:24,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606690008] [2024-11-18 08:56:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:56:24,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:56:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:56:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 08:56:24,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:56:24,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606690008] [2024-11-18 08:56:24,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606690008] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:56:24,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:56:24,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 08:56:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426331464] [2024-11-18 08:56:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:56:24,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 08:56:24,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:56:24,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 08:56:24,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 08:56:24,445 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:56:24,480 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2024-11-18 08:56:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 08:56:24,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2024-11-18 08:56:24,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:56:24,491 INFO L225 Difference]: With dead ends: 36 [2024-11-18 08:56:24,491 INFO L226 Difference]: Without dead ends: 18 [2024-11-18 08:56:24,493 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 [2024-11-18 08:56:24,497 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 08:56:24,498 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 08:56:24,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-18 08:56:24,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2024-11-18 08:56:24,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-11-18 08:56:24,522 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2024-11-18 08:56:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:56:24,522 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-11-18 08:56:24,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:24,523 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-11-18 08:56:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-18 08:56:24,523 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:56:24,523 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:56:24,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 08:56:24,524 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:56:24,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:56:24,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2024-11-18 08:56:24,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:56:24,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191803594] [2024-11-18 08:56:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:56:24,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:56:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:56:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 08:56:24,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:56:24,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191803594] [2024-11-18 08:56:24,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191803594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:56:24,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746960853] [2024-11-18 08:56:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:56:24,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:56:24,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:56:24,664 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) [2024-11-18 08:56:24,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 08:56:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:56:24,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-18 08:56:24,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:56:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 08:56:24,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:56:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 08:56:24,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746960853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:56:24,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:56:24,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-18 08:56:24,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715983763] [2024-11-18 08:56:24,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:56:24,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 08:56:24,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:56:24,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 08:56:24,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 08:56:24,847 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:56:24,906 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-11-18 08:56:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 08:56:24,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2024-11-18 08:56:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:56:24,909 INFO L225 Difference]: With dead ends: 37 [2024-11-18 08:56:24,909 INFO L226 Difference]: Without dead ends: 26 [2024-11-18 08:56:24,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 08:56:24,910 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 08:56:24,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 08:56:24,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-18 08:56:24,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-18 08:56:24,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2024-11-18 08:56:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-11-18 08:56:24,919 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2024-11-18 08:56:24,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:56:24,919 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-11-18 08:56:24,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:24,919 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-11-18 08:56:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-18 08:56:24,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:56:24,920 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:56:24,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-18 08:56:25,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:56:25,122 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:56:25,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:56:25,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1754797751, now seen corresponding path program 2 times [2024-11-18 08:56:25,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:56:25,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160067870] [2024-11-18 08:56:25,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:56:25,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:56:25,178 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:56:25,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:56:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:56:25,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:56:25,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160067870] [2024-11-18 08:56:25,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160067870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:56:25,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830429589] [2024-11-18 08:56:25,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:56:25,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:56:25,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:56:25,324 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) [2024-11-18 08:56:25,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 08:56:25,394 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:56:25,394 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:56:25,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 08:56:25,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:56:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:56:25,436 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:56:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 08:56:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830429589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:56:25,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:56:25,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-18 08:56:25,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729706335] [2024-11-18 08:56:25,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:56:25,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-18 08:56:25,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:56:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-18 08:56:25,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-18 08:56:25,529 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:56:25,632 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2024-11-18 08:56:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 08:56:25,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-18 08:56:25,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:56:25,634 INFO L225 Difference]: With dead ends: 57 [2024-11-18 08:56:25,634 INFO L226 Difference]: Without dead ends: 44 [2024-11-18 08:56:25,635 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-18 08:56:25,636 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:56:25,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:56:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-18 08:56:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-18 08:56:25,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-11-18 08:56:25,643 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 21 [2024-11-18 08:56:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:56:25,644 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-11-18 08:56:25,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-11-18 08:56:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-18 08:56:25,645 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:56:25,645 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:56:25,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 08:56:25,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-18 08:56:25,850 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:56:25,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:56:25,851 INFO L85 PathProgramCache]: Analyzing trace with hash -707072841, now seen corresponding path program 3 times [2024-11-18 08:56:25,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:56:25,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786195888] [2024-11-18 08:56:25,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 08:56:25,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:56:25,940 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-18 08:56:25,940 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:56:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-18 08:56:26,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:56:26,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786195888] [2024-11-18 08:56:26,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786195888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:56:26,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439134793] [2024-11-18 08:56:26,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 08:56:26,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:56:26,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:56:26,092 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) [2024-11-18 08:56:26,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 08:56:26,206 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-18 08:56:26,206 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:56:26,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-18 08:56:26,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:56:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-18 08:56:26,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:56:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-18 08:56:26,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439134793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:56:26,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:56:26,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-18 08:56:26,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185785570] [2024-11-18 08:56:26,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:56:26,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-18 08:56:26,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:56:26,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-18 08:56:26,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-11-18 08:56:26,359 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2024-11-18 08:56:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:56:26,472 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2024-11-18 08:56:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-18 08:56:26,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 39 [2024-11-18 08:56:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:56:26,475 INFO L225 Difference]: With dead ends: 80 [2024-11-18 08:56:26,475 INFO L226 Difference]: Without dead ends: 61 [2024-11-18 08:56:26,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-11-18 08:56:26,477 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:56:26,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:56:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-18 08:56:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-11-18 08:56:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:26,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2024-11-18 08:56:26,492 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 39 [2024-11-18 08:56:26,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:56:26,493 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2024-11-18 08:56:26,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2024-11-18 08:56:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2024-11-18 08:56:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-18 08:56:26,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:56:26,495 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:56:26,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 08:56:26,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:56:26,700 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:56:26,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:56:26,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1508536229, now seen corresponding path program 4 times [2024-11-18 08:56:26,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:56:26,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558034836] [2024-11-18 08:56:26,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 08:56:26,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:56:26,752 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 08:56:26,752 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:56:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-18 08:56:27,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:56:27,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558034836] [2024-11-18 08:56:27,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558034836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:56:27,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122797428] [2024-11-18 08:56:27,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 08:56:27,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:56:27,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:56:27,120 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) [2024-11-18 08:56:27,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 08:56:27,237 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 08:56:27,238 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:56:27,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 08:56:27,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:56:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-18 08:56:27,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:56:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-18 08:56:27,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122797428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:56:27,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:56:27,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2024-11-18 08:56:27,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417581520] [2024-11-18 08:56:27,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:56:27,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-18 08:56:27,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:56:27,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-18 08:56:27,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2024-11-18 08:56:27,647 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:56:27,805 INFO L93 Difference]: Finished difference Result 125 states and 144 transitions. [2024-11-18 08:56:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-18 08:56:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-18 08:56:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:56:27,807 INFO L225 Difference]: With dead ends: 125 [2024-11-18 08:56:27,807 INFO L226 Difference]: Without dead ends: 92 [2024-11-18 08:56:27,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2024-11-18 08:56:27,808 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:56:27,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 83 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:56:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-18 08:56:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2024-11-18 08:56:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2024-11-18 08:56:27,824 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 57 [2024-11-18 08:56:27,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:56:27,825 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2024-11-18 08:56:27,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2024-11-18 08:56:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-18 08:56:27,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:56:27,829 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:56:27,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-18 08:56:28,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:56:28,034 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:56:28,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:56:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash 69764743, now seen corresponding path program 5 times [2024-11-18 08:56:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:56:28,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069027829] [2024-11-18 08:56:28,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 08:56:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:56:28,195 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2024-11-18 08:56:28,196 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:56:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-18 08:56:28,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:56:28,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069027829] [2024-11-18 08:56:28,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069027829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:56:28,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169466572] [2024-11-18 08:56:28,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 08:56:28,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:56:28,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:56:28,530 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) [2024-11-18 08:56:28,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 08:56:58,778 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2024-11-18 08:56:58,778 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:56:58,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-18 08:56:58,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:56:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-18 08:56:58,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:56:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-18 08:56:59,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169466572] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:56:59,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:56:59,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2024-11-18 08:56:59,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659924676] [2024-11-18 08:56:59,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:56:59,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-18 08:56:59,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:56:59,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-18 08:56:59,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2024-11-18 08:56:59,235 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:56:59,472 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2024-11-18 08:56:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-18 08:56:59,473 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2024-11-18 08:56:59,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:56:59,476 INFO L225 Difference]: With dead ends: 160 [2024-11-18 08:56:59,476 INFO L226 Difference]: Without dead ends: 125 [2024-11-18 08:56:59,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2024-11-18 08:56:59,480 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 08:56:59,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 28 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 08:56:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-18 08:56:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2024-11-18 08:56:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2024-11-18 08:56:59,503 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 87 [2024-11-18 08:56:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:56:59,503 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2024-11-18 08:56:59,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 08:56:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2024-11-18 08:56:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-18 08:56:59,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:56:59,506 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:56:59,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-18 08:56:59,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:56:59,707 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:56:59,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:56:59,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1169192091, now seen corresponding path program 6 times [2024-11-18 08:56:59,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:56:59,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156172344] [2024-11-18 08:56:59,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 08:56:59,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:57:00,000 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2024-11-18 08:57:00,000 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:57:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-11-18 08:57:01,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:57:01,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156172344] [2024-11-18 08:57:01,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156172344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:57:01,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741804374] [2024-11-18 08:57:01,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 08:57:01,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:57:01,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:57:01,054 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) [2024-11-18 08:57:01,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process