./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.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 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 21:17:03,438 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 21:17:03,489 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 21:17:03,494 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 21:17:03,495 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 21:17:03,513 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 21:17:03,514 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 21:17:03,514 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 21:17:03,515 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 21:17:03,516 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 21:17:03,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 21:17:03,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 21:17:03,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 21:17:03,518 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 21:17:03,518 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 21:17:03,518 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 21:17:03,518 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 21:17:03,519 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 21:17:03,519 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 21:17:03,519 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 21:17:03,519 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 21:17:03,521 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 21:17:03,521 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 21:17:03,522 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 21:17:03,522 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 21:17:03,522 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 21:17:03,522 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 21:17:03,522 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 21:17:03,523 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 21:17:03,523 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 21:17:03,523 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 21:17:03,523 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 21:17:03,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 21:17:03,524 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 21:17:03,524 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 21:17:03,524 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 21:17:03,524 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 21:17:03,524 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 21:17:03,524 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 21:17:03,524 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 21:17:03,525 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 21:17:03,526 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 21:17:03,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef [2024-11-19 21:17:03,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 21:17:03,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 21:17:03,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 21:17:03,766 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 21:17:03,766 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 21:17:03,767 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2024-11-19 21:17:04,913 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 21:17:05,092 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 21:17:05,092 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2024-11-19 21:17:05,098 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8c2aed2f/bb1875723fbe4d70ae806527b563eec8/FLAG50e2b36ff [2024-11-19 21:17:05,505 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8c2aed2f/bb1875723fbe4d70ae806527b563eec8 [2024-11-19 21:17:05,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 21:17:05,511 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 21:17:05,512 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 21:17:05,512 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 21:17:05,517 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 21:17:05,517 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,518 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488a9d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05, skipping insertion in model container [2024-11-19 21:17:05,518 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,533 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 21:17:05,662 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/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2024-11-19 21:17:05,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 21:17:05,691 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 21:17:05,700 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/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2024-11-19 21:17:05,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 21:17:05,731 INFO L204 MainTranslator]: Completed translation [2024-11-19 21:17:05,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05 WrapperNode [2024-11-19 21:17:05,732 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 21:17:05,733 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 21:17:05,734 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 21:17:05,734 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 21:17:05,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,762 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 94 [2024-11-19 21:17:05,763 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 21:17:05,763 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 21:17:05,763 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 21:17:05,763 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 21:17:05,771 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,773 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,781 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-19 21:17:05,784 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,784 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,789 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,792 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,793 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,794 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,795 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 21:17:05,795 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 21:17:05,795 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 21:17:05,796 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 21:17:05,796 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (1/1) ... [2024-11-19 21:17:05,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 21:17:05,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:05,824 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) [2024-11-19 21:17:05,826 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 [2024-11-19 21:17:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 21:17:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-19 21:17:05,861 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-19 21:17:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 21:17:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 21:17:05,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 21:17:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-19 21:17:05,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-19 21:17:05,914 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 21:17:05,916 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 21:17:06,076 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-19 21:17:06,077 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 21:17:06,085 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 21:17:06,085 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 21:17:06,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:17:06 BoogieIcfgContainer [2024-11-19 21:17:06,085 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 21:17:06,091 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 21:17:06,091 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 21:17:06,093 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 21:17:06,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:17:05" (1/3) ... [2024-11-19 21:17:06,094 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341d854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:17:06, skipping insertion in model container [2024-11-19 21:17:06,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:05" (2/3) ... [2024-11-19 21:17:06,094 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341d854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:17:06, skipping insertion in model container [2024-11-19 21:17:06,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:17:06" (3/3) ... [2024-11-19 21:17:06,095 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2024-11-19 21:17:06,106 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 21:17:06,107 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 21:17:06,148 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 21:17:06,153 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;@494a40dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 21:17:06,153 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 21:17:06,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-19 21:17:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-19 21:17:06,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:06,162 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:06,162 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:06,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:06,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2024-11-19 21:17:06,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:06,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570702633] [2024-11-19 21:17:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:06,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,272 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:06,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:06,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570702633] [2024-11-19 21:17:06,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570702633] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:17:06,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:17:06,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 21:17:06,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005350348] [2024-11-19 21:17:06,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:17:06,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 21:17:06,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 21:17:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 21:17:06,307 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 21:17:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:06,321 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2024-11-19 21:17:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 21:17:06,322 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-11-19 21:17:06,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:06,326 INFO L225 Difference]: With dead ends: 67 [2024-11-19 21:17:06,326 INFO L226 Difference]: Without dead ends: 31 [2024-11-19 21:17:06,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 21:17:06,330 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:06,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:17:06,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-19 21:17:06,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-19 21:17:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 21:17:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-11-19 21:17:06,357 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2024-11-19 21:17:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:06,357 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-11-19 21:17:06,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 21:17:06,358 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-11-19 21:17:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-19 21:17:06,358 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:06,359 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:06,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 21:17:06,359 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:06,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:06,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2024-11-19 21:17:06,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:06,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284026703] [2024-11-19 21:17:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:06,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:06,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:06,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284026703] [2024-11-19 21:17:06,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284026703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:17:06,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:17:06,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 21:17:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908487590] [2024-11-19 21:17:06,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:17:06,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 21:17:06,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 21:17:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 21:17:06,474 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:06,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:06,496 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-11-19 21:17:06,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 21:17:06,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-11-19 21:17:06,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:06,498 INFO L225 Difference]: With dead ends: 40 [2024-11-19 21:17:06,498 INFO L226 Difference]: Without dead ends: 33 [2024-11-19 21:17:06,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 21:17:06,499 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:06,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:17:06,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-19 21:17:06,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-19 21:17:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 21:17:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-11-19 21:17:06,505 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2024-11-19 21:17:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:06,506 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-11-19 21:17:06,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-11-19 21:17:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-19 21:17:06,507 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:06,507 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:06,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 21:17:06,508 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:06,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:06,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2024-11-19 21:17:06,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:06,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444283165] [2024-11-19 21:17:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:06,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,639 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,643 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 21:17:06,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:06,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444283165] [2024-11-19 21:17:06,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444283165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:17:06,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:17:06,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 21:17:06,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521135687] [2024-11-19 21:17:06,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:17:06,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 21:17:06,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 21:17:06,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:17:06,679 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:06,753 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2024-11-19 21:17:06,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 21:17:06,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-19 21:17:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:06,754 INFO L225 Difference]: With dead ends: 53 [2024-11-19 21:17:06,754 INFO L226 Difference]: Without dead ends: 46 [2024-11-19 21:17:06,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:17:06,757 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 42 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:06,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 119 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:17:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-19 21:17:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2024-11-19 21:17:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 21:17:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2024-11-19 21:17:06,766 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2024-11-19 21:17:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:06,767 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2024-11-19 21:17:06,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2024-11-19 21:17:06,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-19 21:17:06,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:06,768 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:06,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 21:17:06,768 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:06,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:06,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2024-11-19 21:17:06,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:06,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249498629] [2024-11-19 21:17:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:06,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,846 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:06,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:06,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249498629] [2024-11-19 21:17:06,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249498629] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:17:06,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:17:06,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:17:06,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691511991] [2024-11-19 21:17:06,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:17:06,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:17:06,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:06,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:17:06,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:17:06,861 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:06,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:06,881 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2024-11-19 21:17:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:17:06,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-19 21:17:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:06,882 INFO L225 Difference]: With dead ends: 58 [2024-11-19 21:17:06,882 INFO L226 Difference]: Without dead ends: 36 [2024-11-19 21:17:06,882 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:17:06,883 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:06,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 103 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:17:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-19 21:17:06,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-19 21:17:06,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 21:17:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2024-11-19 21:17:06,894 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2024-11-19 21:17:06,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:06,894 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2024-11-19 21:17:06,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2024-11-19 21:17:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-19 21:17:06,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:06,896 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:06,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 21:17:06,897 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:06,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2024-11-19 21:17:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:06,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936938468] [2024-11-19 21:17:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:06,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893175686] [2024-11-19 21:17:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:06,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:06,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:06,921 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) [2024-11-19 21:17:06,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 21:17:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:06,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 21:17:06,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:07,106 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 21:17:07,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:07,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936938468] [2024-11-19 21:17:07,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:07,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893175686] [2024-11-19 21:17:07,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893175686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:17:07,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:17:07,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:17:07,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635090287] [2024-11-19 21:17:07,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:17:07,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:17:07,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:17:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:17:07,110 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:07,166 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2024-11-19 21:17:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:17:07,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-19 21:17:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:07,168 INFO L225 Difference]: With dead ends: 54 [2024-11-19 21:17:07,169 INFO L226 Difference]: Without dead ends: 52 [2024-11-19 21:17:07,169 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:17:07,171 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:07,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:17:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-19 21:17:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-11-19 21:17:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-19 21:17:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2024-11-19 21:17:07,190 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2024-11-19 21:17:07,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:07,191 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2024-11-19 21:17:07,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:07,191 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2024-11-19 21:17:07,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-19 21:17:07,191 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:07,191 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:07,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 21:17:07,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:07,392 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:07,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:07,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2024-11-19 21:17:07,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:07,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171839872] [2024-11-19 21:17:07,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:07,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:07,525 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:07,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:07,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:07,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171839872] [2024-11-19 21:17:07,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171839872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:17:07,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919737564] [2024-11-19 21:17:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:07,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:07,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:07,539 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) [2024-11-19 21:17:07,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 21:17:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:07,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 21:17:07,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:07,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:07,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919737564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:07,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:17:07,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-19 21:17:07,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571101265] [2024-11-19 21:17:07,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:07,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 21:17:07,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:07,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 21:17:07,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-19 21:17:07,660 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 21:17:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:07,799 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2024-11-19 21:17:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 21:17:07,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2024-11-19 21:17:07,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:07,802 INFO L225 Difference]: With dead ends: 147 [2024-11-19 21:17:07,802 INFO L226 Difference]: Without dead ends: 140 [2024-11-19 21:17:07,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-19 21:17:07,803 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 95 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:07,803 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 171 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:17:07,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-19 21:17:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2024-11-19 21:17:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-19 21:17:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2024-11-19 21:17:07,820 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2024-11-19 21:17:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:07,820 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2024-11-19 21:17:07,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 21:17:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2024-11-19 21:17:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-19 21:17:07,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:07,821 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:07,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 21:17:08,025 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,SelfDestructingSolverStorable5 [2024-11-19 21:17:08,026 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:08,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:08,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2024-11-19 21:17:08,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:08,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474892044] [2024-11-19 21:17:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:08,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:08,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:08,117 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 21:17:08,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:08,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474892044] [2024-11-19 21:17:08,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474892044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:17:08,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430927587] [2024-11-19 21:17:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:08,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:08,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:08,123 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) [2024-11-19 21:17:08,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 21:17:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:08,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 21:17:08,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 21:17:08,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 21:17:08,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430927587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:08,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:17:08,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-19 21:17:08,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14008655] [2024-11-19 21:17:08,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:08,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 21:17:08,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:08,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 21:17:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-19 21:17:08,246 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 21:17:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:08,412 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2024-11-19 21:17:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 21:17:08,413 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-19 21:17:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:08,415 INFO L225 Difference]: With dead ends: 183 [2024-11-19 21:17:08,416 INFO L226 Difference]: Without dead ends: 171 [2024-11-19 21:17:08,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-19 21:17:08,417 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 114 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:08,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 283 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:17:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-19 21:17:08,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2024-11-19 21:17:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-19 21:17:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2024-11-19 21:17:08,438 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2024-11-19 21:17:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:08,438 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2024-11-19 21:17:08,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 21:17:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2024-11-19 21:17:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 21:17:08,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:08,439 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:08,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 21:17:08,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:08,644 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:08,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:08,644 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2024-11-19 21:17:08,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:08,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417262056] [2024-11-19 21:17:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:08,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:08,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124298590] [2024-11-19 21:17:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:08,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:08,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:08,660 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) [2024-11-19 21:17:08,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 21:17:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:08,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 21:17:08,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:08,783 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 21:17:08,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:08,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417262056] [2024-11-19 21:17:08,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:08,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124298590] [2024-11-19 21:17:08,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124298590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:17:08,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:17:08,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:17:08,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844410699] [2024-11-19 21:17:08,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:17:08,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:17:08,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:08,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:17:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:17:08,788 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 21:17:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:08,833 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2024-11-19 21:17:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:17:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-19 21:17:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:08,835 INFO L225 Difference]: With dead ends: 143 [2024-11-19 21:17:08,835 INFO L226 Difference]: Without dead ends: 141 [2024-11-19 21:17:08,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:17:08,837 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:08,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:17:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-19 21:17:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2024-11-19 21:17:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-19 21:17:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2024-11-19 21:17:08,854 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2024-11-19 21:17:08,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:08,855 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2024-11-19 21:17:08,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 21:17:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2024-11-19 21:17:08,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-19 21:17:08,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:08,856 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:08,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 21:17:09,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:09,057 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:09,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:09,058 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2024-11-19 21:17:09,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:09,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956659617] [2024-11-19 21:17:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:09,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:09,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791514315] [2024-11-19 21:17:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:09,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:09,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:09,079 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) [2024-11-19 21:17:09,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 21:17:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:09,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 21:17:09,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:09,210 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:09,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:09,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956659617] [2024-11-19 21:17:09,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:09,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791514315] [2024-11-19 21:17:09,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791514315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:09,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:17:09,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-19 21:17:09,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880619890] [2024-11-19 21:17:09,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:09,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 21:17:09,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:09,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 21:17:09,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-19 21:17:09,324 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:09,401 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2024-11-19 21:17:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 21:17:09,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-19 21:17:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:09,403 INFO L225 Difference]: With dead ends: 175 [2024-11-19 21:17:09,403 INFO L226 Difference]: Without dead ends: 173 [2024-11-19 21:17:09,404 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-19 21:17:09,405 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 35 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:09,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 232 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:17:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-19 21:17:09,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2024-11-19 21:17:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-19 21:17:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2024-11-19 21:17:09,428 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2024-11-19 21:17:09,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:09,428 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2024-11-19 21:17:09,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:09,428 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2024-11-19 21:17:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-19 21:17:09,430 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:09,430 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:09,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 21:17:09,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:09,634 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:09,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:09,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2024-11-19 21:17:09,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:09,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033820158] [2024-11-19 21:17:09,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:09,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:09,678 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:09,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:09,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:09,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033820158] [2024-11-19 21:17:09,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033820158] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:17:09,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:17:09,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 21:17:09,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630289728] [2024-11-19 21:17:09,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:17:09,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 21:17:09,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:09,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 21:17:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:17:09,690 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:09,714 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2024-11-19 21:17:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 21:17:09,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-19 21:17:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:09,715 INFO L225 Difference]: With dead ends: 237 [2024-11-19 21:17:09,715 INFO L226 Difference]: Without dead ends: 170 [2024-11-19 21:17:09,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:17:09,716 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:09,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 105 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:17:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-19 21:17:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-11-19 21:17:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-19 21:17:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2024-11-19 21:17:09,738 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2024-11-19 21:17:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:09,738 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2024-11-19 21:17:09,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2024-11-19 21:17:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-19 21:17:09,742 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:09,742 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:09,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 21:17:09,742 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:09,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:09,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2024-11-19 21:17:09,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:09,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326906191] [2024-11-19 21:17:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:09,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:09,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532901030] [2024-11-19 21:17:09,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:09,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:09,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:09,755 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) [2024-11-19 21:17:09,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 21:17:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:09,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 21:17:09,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 21:17:09,832 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 21:17:09,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:09,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326906191] [2024-11-19 21:17:09,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:09,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532901030] [2024-11-19 21:17:09,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532901030] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:17:09,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:17:09,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:17:09,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188881098] [2024-11-19 21:17:09,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:17:09,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:17:09,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:09,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:17:09,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:17:09,836 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 21:17:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:09,888 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2024-11-19 21:17:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:17:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-11-19 21:17:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:09,891 INFO L225 Difference]: With dead ends: 235 [2024-11-19 21:17:09,891 INFO L226 Difference]: Without dead ends: 233 [2024-11-19 21:17:09,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:17:09,892 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:09,892 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:17:09,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-11-19 21:17:09,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2024-11-19 21:17:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-19 21:17:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2024-11-19 21:17:09,916 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2024-11-19 21:17:09,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:09,917 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2024-11-19 21:17:09,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 21:17:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2024-11-19 21:17:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-19 21:17:09,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:09,918 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:09,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 21:17:10,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:10,123 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:10,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:10,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2024-11-19 21:17:10,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:10,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563416858] [2024-11-19 21:17:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:10,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:10,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406896137] [2024-11-19 21:17:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:10,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:10,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:10,137 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) [2024-11-19 21:17:10,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 21:17:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:10,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-19 21:17:10,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 21:17:10,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:10,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:10,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563416858] [2024-11-19 21:17:10,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:10,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406896137] [2024-11-19 21:17:10,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406896137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:17:10,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 21:17:10,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-11-19 21:17:10,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305310849] [2024-11-19 21:17:10,389 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:10,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 21:17:10,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:10,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 21:17:10,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-19 21:17:10,390 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 21:17:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:10,543 INFO L93 Difference]: Finished difference Result 238 states and 330 transitions. [2024-11-19 21:17:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 21:17:10,543 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2024-11-19 21:17:10,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:10,547 INFO L225 Difference]: With dead ends: 238 [2024-11-19 21:17:10,547 INFO L226 Difference]: Without dead ends: 236 [2024-11-19 21:17:10,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-19 21:17:10,547 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 62 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:10,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 281 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:17:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-19 21:17:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2024-11-19 21:17:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 166 states have (on average 1.355421686746988) internal successors, (225), 167 states have internal predecessors, (225), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-19 21:17:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2024-11-19 21:17:10,571 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 37 [2024-11-19 21:17:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:10,572 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2024-11-19 21:17:10,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 21:17:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2024-11-19 21:17:10,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-19 21:17:10,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:10,573 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:10,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 21:17:10,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:10,777 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:10,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2024-11-19 21:17:10,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:10,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675048592] [2024-11-19 21:17:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:10,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:10,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195659168] [2024-11-19 21:17:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:10,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:10,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:10,790 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) [2024-11-19 21:17:10,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 21:17:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:10,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 21:17:10,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 21:17:10,863 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 21:17:10,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:10,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675048592] [2024-11-19 21:17:10,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:10,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195659168] [2024-11-19 21:17:10,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195659168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:17:10,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:17:10,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:17:10,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430492490] [2024-11-19 21:17:10,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:17:10,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:17:10,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:10,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:17:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:17:10,865 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 21:17:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:10,923 INFO L93 Difference]: Finished difference Result 309 states and 454 transitions. [2024-11-19 21:17:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:17:10,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2024-11-19 21:17:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:10,926 INFO L225 Difference]: With dead ends: 309 [2024-11-19 21:17:10,926 INFO L226 Difference]: Without dead ends: 307 [2024-11-19 21:17:10,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:17:10,927 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:10,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 136 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:17:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2024-11-19 21:17:10,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 292. [2024-11-19 21:17:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 187 states have (on average 1.358288770053476) internal successors, (254), 197 states have internal predecessors, (254), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2024-11-19 21:17:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 427 transitions. [2024-11-19 21:17:10,953 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 427 transitions. Word has length 40 [2024-11-19 21:17:10,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:10,954 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 427 transitions. [2024-11-19 21:17:10,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 21:17:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 427 transitions. [2024-11-19 21:17:10,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-19 21:17:10,955 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:10,955 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:10,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 21:17:11,156 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,SelfDestructingSolverStorable12 [2024-11-19 21:17:11,156 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:11,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:11,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2024-11-19 21:17:11,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:11,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410092159] [2024-11-19 21:17:11,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:11,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:11,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:11,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 21:17:11,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:11,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410092159] [2024-11-19 21:17:11,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410092159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:17:11,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068309948] [2024-11-19 21:17:11,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:11,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:11,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:11,220 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:11,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 21:17:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:11,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 21:17:11,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 21:17:11,278 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 21:17:11,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068309948] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:11,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:17:11,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-11-19 21:17:11,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422737402] [2024-11-19 21:17:11,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:11,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 21:17:11,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:11,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 21:17:11,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-11-19 21:17:11,344 INFO L87 Difference]: Start difference. First operand 292 states and 427 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 21:17:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:11,525 INFO L93 Difference]: Finished difference Result 725 states and 1031 transitions. [2024-11-19 21:17:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 21:17:11,526 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-11-19 21:17:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:11,531 INFO L225 Difference]: With dead ends: 725 [2024-11-19 21:17:11,531 INFO L226 Difference]: Without dead ends: 575 [2024-11-19 21:17:11,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2024-11-19 21:17:11,533 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 137 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:11,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 277 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:17:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-19 21:17:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2024-11-19 21:17:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 357 states have (on average 1.2997198879551821) internal successors, (464), 371 states have internal predecessors, (464), 142 states have call successors, (142), 41 states have call predecessors, (142), 41 states have return successors, (138), 128 states have call predecessors, (138), 138 states have call successors, (138) [2024-11-19 21:17:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 744 transitions. [2024-11-19 21:17:11,575 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 744 transitions. Word has length 38 [2024-11-19 21:17:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:11,575 INFO L471 AbstractCegarLoop]: Abstraction has 541 states and 744 transitions. [2024-11-19 21:17:11,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 21:17:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 744 transitions. [2024-11-19 21:17:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-19 21:17:11,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:11,576 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:11,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 21:17:11,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 21:17:11,777 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:11,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:11,777 INFO L85 PathProgramCache]: Analyzing trace with hash 321915013, now seen corresponding path program 2 times [2024-11-19 21:17:11,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:11,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004826854] [2024-11-19 21:17:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:11,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:11,826 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:11,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:11,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:11,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004826854] [2024-11-19 21:17:11,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004826854] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:17:11,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:17:11,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:17:11,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312706636] [2024-11-19 21:17:11,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:17:11,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:17:11,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:11,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:17:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:17:11,832 INFO L87 Difference]: Start difference. First operand 541 states and 744 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:11,940 INFO L93 Difference]: Finished difference Result 789 states and 1136 transitions. [2024-11-19 21:17:11,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 21:17:11,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-11-19 21:17:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:11,943 INFO L225 Difference]: With dead ends: 789 [2024-11-19 21:17:11,943 INFO L226 Difference]: Without dead ends: 644 [2024-11-19 21:17:11,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-19 21:17:11,944 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 29 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:11,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 174 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:17:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2024-11-19 21:17:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 539. [2024-11-19 21:17:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 359 states have (on average 1.3064066852367688) internal successors, (469), 373 states have internal predecessors, (469), 138 states have call successors, (138), 41 states have call predecessors, (138), 41 states have return successors, (134), 124 states have call predecessors, (134), 134 states have call successors, (134) [2024-11-19 21:17:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 741 transitions. [2024-11-19 21:17:11,985 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 741 transitions. Word has length 39 [2024-11-19 21:17:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:11,985 INFO L471 AbstractCegarLoop]: Abstraction has 539 states and 741 transitions. [2024-11-19 21:17:11,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:17:11,985 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 741 transitions. [2024-11-19 21:17:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-19 21:17:11,986 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:11,986 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:11,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 21:17:11,986 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:11,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:11,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2024-11-19 21:17:11,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:11,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585699383] [2024-11-19 21:17:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:11,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:12,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:12,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:12,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585699383] [2024-11-19 21:17:12,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585699383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:17:12,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268114099] [2024-11-19 21:17:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:12,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:12,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:12,069 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:12,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 21:17:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:12,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 21:17:12,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:12,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:17:12,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268114099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:12,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:17:12,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-19 21:17:12,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110480208] [2024-11-19 21:17:12,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:12,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 21:17:12,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:12,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 21:17:12,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-19 21:17:12,198 INFO L87 Difference]: Start difference. First operand 539 states and 741 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 21:17:12,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:12,471 INFO L93 Difference]: Finished difference Result 1163 states and 1625 transitions. [2024-11-19 21:17:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 21:17:12,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2024-11-19 21:17:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:12,476 INFO L225 Difference]: With dead ends: 1163 [2024-11-19 21:17:12,476 INFO L226 Difference]: Without dead ends: 840 [2024-11-19 21:17:12,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2024-11-19 21:17:12,478 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 210 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:12,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 279 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 21:17:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2024-11-19 21:17:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 803. [2024-11-19 21:17:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 533 states have (on average 1.24953095684803) internal successors, (666), 555 states have internal predecessors, (666), 212 states have call successors, (212), 57 states have call predecessors, (212), 57 states have return successors, (206), 190 states have call predecessors, (206), 206 states have call successors, (206) [2024-11-19 21:17:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1084 transitions. [2024-11-19 21:17:12,565 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1084 transitions. Word has length 39 [2024-11-19 21:17:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:12,566 INFO L471 AbstractCegarLoop]: Abstraction has 803 states and 1084 transitions. [2024-11-19 21:17:12,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 21:17:12,566 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1084 transitions. [2024-11-19 21:17:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-19 21:17:12,567 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:12,567 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:12,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 21:17:12,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 21:17:12,768 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:12,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:12,768 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2024-11-19 21:17:12,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:12,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651242273] [2024-11-19 21:17:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:12,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:12,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153768924] [2024-11-19 21:17:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:12,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:12,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:12,783 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:12,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 21:17:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:12,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-19 21:17:12,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 21:17:13,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-19 21:17:13,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:13,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651242273] [2024-11-19 21:17:13,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:13,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153768924] [2024-11-19 21:17:13,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153768924] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:13,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:17:13,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-19 21:17:13,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455809173] [2024-11-19 21:17:13,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:13,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 21:17:13,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 21:17:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-19 21:17:13,769 INFO L87 Difference]: Start difference. First operand 803 states and 1084 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-19 21:17:16,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:16,399 INFO L93 Difference]: Finished difference Result 1218 states and 1723 transitions. [2024-11-19 21:17:16,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-19 21:17:16,399 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 54 [2024-11-19 21:17:16,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:16,408 INFO L225 Difference]: With dead ends: 1218 [2024-11-19 21:17:16,409 INFO L226 Difference]: Without dead ends: 1196 [2024-11-19 21:17:16,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-11-19 21:17:16,410 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 331 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:16,410 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1150 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-19 21:17:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2024-11-19 21:17:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 885. [2024-11-19 21:17:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 592 states have (on average 1.2533783783783783) internal successors, (742), 612 states have internal predecessors, (742), 231 states have call successors, (231), 61 states have call predecessors, (231), 61 states have return successors, (226), 211 states have call predecessors, (226), 226 states have call successors, (226) [2024-11-19 21:17:16,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1199 transitions. [2024-11-19 21:17:16,601 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1199 transitions. Word has length 54 [2024-11-19 21:17:16,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:16,601 INFO L471 AbstractCegarLoop]: Abstraction has 885 states and 1199 transitions. [2024-11-19 21:17:16,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-19 21:17:16,601 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1199 transitions. [2024-11-19 21:17:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-19 21:17:16,602 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:16,602 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:16,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 21:17:16,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 21:17:16,807 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:16,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2024-11-19 21:17:16,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:16,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108270576] [2024-11-19 21:17:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:16,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:16,920 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:16,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:16,925 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-19 21:17:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:16,927 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-19 21:17:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:16,929 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-19 21:17:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:16,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-19 21:17:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-19 21:17:16,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:16,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108270576] [2024-11-19 21:17:16,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108270576] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:17:16,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069167797] [2024-11-19 21:17:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:16,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:16,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:16,936 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:16,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 21:17:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:16,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 21:17:16,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-19 21:17:17,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-19 21:17:17,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069167797] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:17,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:17:17,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 14 [2024-11-19 21:17:17,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444453916] [2024-11-19 21:17:17,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:17,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 21:17:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 21:17:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-19 21:17:17,122 INFO L87 Difference]: Start difference. First operand 885 states and 1199 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-19 21:17:17,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:17,431 INFO L93 Difference]: Finished difference Result 962 states and 1278 transitions. [2024-11-19 21:17:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 21:17:17,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 60 [2024-11-19 21:17:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:17,436 INFO L225 Difference]: With dead ends: 962 [2024-11-19 21:17:17,436 INFO L226 Difference]: Without dead ends: 940 [2024-11-19 21:17:17,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2024-11-19 21:17:17,436 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 152 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:17,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 297 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:17:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2024-11-19 21:17:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 909. [2024-11-19 21:17:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 616 states have (on average 1.2305194805194806) internal successors, (758), 636 states have internal predecessors, (758), 231 states have call successors, (231), 61 states have call predecessors, (231), 61 states have return successors, (226), 211 states have call predecessors, (226), 226 states have call successors, (226) [2024-11-19 21:17:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1215 transitions. [2024-11-19 21:17:17,561 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1215 transitions. Word has length 60 [2024-11-19 21:17:17,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:17,561 INFO L471 AbstractCegarLoop]: Abstraction has 909 states and 1215 transitions. [2024-11-19 21:17:17,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-19 21:17:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1215 transitions. [2024-11-19 21:17:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-19 21:17:17,562 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:17,562 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:17,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 21:17:17,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 21:17:17,766 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:17,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:17,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1269665814, now seen corresponding path program 1 times [2024-11-19 21:17:17,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:17,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069960842] [2024-11-19 21:17:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:17,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:17,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:17,803 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:17,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-19 21:17:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:17,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-19 21:17:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:17,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-19 21:17:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:17,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-19 21:17:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:17,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-11-19 21:17:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:17,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-11-19 21:17:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-19 21:17:17,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069960842] [2024-11-19 21:17:17,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069960842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:17:17,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:17:17,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:17:17,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677220751] [2024-11-19 21:17:17,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:17:17,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:17:17,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:17,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:17:17,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:17:17,834 INFO L87 Difference]: Start difference. First operand 909 states and 1215 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-19 21:17:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:17,986 INFO L93 Difference]: Finished difference Result 1466 states and 1977 transitions. [2024-11-19 21:17:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:17:17,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2024-11-19 21:17:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:17,990 INFO L225 Difference]: With dead ends: 1466 [2024-11-19 21:17:17,990 INFO L226 Difference]: Without dead ends: 928 [2024-11-19 21:17:17,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:17:17,992 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:17,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 131 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:17:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2024-11-19 21:17:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 904. [2024-11-19 21:17:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 631 states have (on average 1.2393026941362917) internal successors, (782), 636 states have internal predecessors, (782), 211 states have call successors, (211), 61 states have call predecessors, (211), 61 states have return successors, (206), 206 states have call predecessors, (206), 206 states have call successors, (206) [2024-11-19 21:17:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1199 transitions. [2024-11-19 21:17:18,152 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1199 transitions. Word has length 62 [2024-11-19 21:17:18,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:18,152 INFO L471 AbstractCegarLoop]: Abstraction has 904 states and 1199 transitions. [2024-11-19 21:17:18,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-19 21:17:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1199 transitions. [2024-11-19 21:17:18,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-19 21:17:18,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:18,153 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:18,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 21:17:18,153 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:18,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:18,153 INFO L85 PathProgramCache]: Analyzing trace with hash -862496580, now seen corresponding path program 1 times [2024-11-19 21:17:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:18,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919965025] [2024-11-19 21:17:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:18,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969834046] [2024-11-19 21:17:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:18,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:18,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:18,163 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:18,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 21:17:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:18,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-19 21:17:18,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-19 21:17:18,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-19 21:17:18,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:18,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919965025] [2024-11-19 21:17:18,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:18,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969834046] [2024-11-19 21:17:18,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969834046] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 21:17:18,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 21:17:18,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-19 21:17:18,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312190774] [2024-11-19 21:17:18,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:17:18,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:17:18,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:17:18,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-19 21:17:18,312 INFO L87 Difference]: Start difference. First operand 904 states and 1199 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 21:17:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:18,457 INFO L93 Difference]: Finished difference Result 926 states and 1220 transitions. [2024-11-19 21:17:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:17:18,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2024-11-19 21:17:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:18,461 INFO L225 Difference]: With dead ends: 926 [2024-11-19 21:17:18,462 INFO L226 Difference]: Without dead ends: 924 [2024-11-19 21:17:18,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-19 21:17:18,462 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:18,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 129 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:17:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2024-11-19 21:17:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2024-11-19 21:17:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 646 states have (on average 1.2306501547987616) internal successors, (795), 651 states have internal predecessors, (795), 211 states have call successors, (211), 66 states have call predecessors, (211), 66 states have return successors, (206), 206 states have call predecessors, (206), 206 states have call successors, (206) [2024-11-19 21:17:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1212 transitions. [2024-11-19 21:17:18,585 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1212 transitions. Word has length 63 [2024-11-19 21:17:18,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:18,585 INFO L471 AbstractCegarLoop]: Abstraction has 924 states and 1212 transitions. [2024-11-19 21:17:18,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 21:17:18,585 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1212 transitions. [2024-11-19 21:17:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-19 21:17:18,586 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:18,586 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:18,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 21:17:18,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-19 21:17:18,787 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:18,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1765617383, now seen corresponding path program 1 times [2024-11-19 21:17:18,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:18,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447239696] [2024-11-19 21:17:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:18,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:18,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582399212] [2024-11-19 21:17:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:18,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:18,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:18,803 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:18,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 21:17:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:18,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-19 21:17:18,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-19 21:17:19,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-19 21:17:19,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:19,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447239696] [2024-11-19 21:17:19,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:19,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582399212] [2024-11-19 21:17:19,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582399212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:19,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:17:19,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-19 21:17:19,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466165659] [2024-11-19 21:17:19,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:19,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 21:17:19,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:19,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 21:17:19,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-19 21:17:19,754 INFO L87 Difference]: Start difference. First operand 924 states and 1212 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-19 21:17:22,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-19 21:17:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:24,009 INFO L93 Difference]: Finished difference Result 1139 states and 1529 transitions. [2024-11-19 21:17:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-19 21:17:24,010 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 64 [2024-11-19 21:17:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:24,014 INFO L225 Difference]: With dead ends: 1139 [2024-11-19 21:17:24,014 INFO L226 Difference]: Without dead ends: 1137 [2024-11-19 21:17:24,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-11-19 21:17:24,015 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 245 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:24,016 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 596 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-19 21:17:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2024-11-19 21:17:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1097. [2024-11-19 21:17:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 771 states have (on average 1.25810635538262) internal successors, (970), 776 states have internal predecessors, (970), 255 states have call successors, (255), 70 states have call predecessors, (255), 70 states have return successors, (250), 250 states have call predecessors, (250), 250 states have call successors, (250) [2024-11-19 21:17:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1475 transitions. [2024-11-19 21:17:24,220 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1475 transitions. Word has length 64 [2024-11-19 21:17:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:24,221 INFO L471 AbstractCegarLoop]: Abstraction has 1097 states and 1475 transitions. [2024-11-19 21:17:24,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-19 21:17:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1475 transitions. [2024-11-19 21:17:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-19 21:17:24,221 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:24,222 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:24,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 21:17:24,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:24,426 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:24,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:24,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1447364546, now seen corresponding path program 2 times [2024-11-19 21:17:24,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:24,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698747953] [2024-11-19 21:17:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:24,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:24,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891757339] [2024-11-19 21:17:24,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:17:24,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:24,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:24,440 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:24,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 21:17:24,480 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:17:24,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:17:24,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-19 21:17:24,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 21:17:24,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:24,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:24,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698747953] [2024-11-19 21:17:24,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:24,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891757339] [2024-11-19 21:17:24,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891757339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:17:24,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 21:17:24,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-19 21:17:24,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668973820] [2024-11-19 21:17:24,948 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:24,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 21:17:24,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:24,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 21:17:24,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-19 21:17:24,949 INFO L87 Difference]: Start difference. First operand 1097 states and 1475 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 21:17:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:25,428 INFO L93 Difference]: Finished difference Result 1151 states and 1551 transitions. [2024-11-19 21:17:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 21:17:25,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2024-11-19 21:17:25,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:25,437 INFO L225 Difference]: With dead ends: 1151 [2024-11-19 21:17:25,437 INFO L226 Difference]: Without dead ends: 1149 [2024-11-19 21:17:25,437 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2024-11-19 21:17:25,437 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 100 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:25,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 556 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 21:17:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2024-11-19 21:17:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1099. [2024-11-19 21:17:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 772 states have (on average 1.2577720207253886) internal successors, (971), 777 states have internal predecessors, (971), 255 states have call successors, (255), 71 states have call predecessors, (255), 71 states have return successors, (250), 250 states have call predecessors, (250), 250 states have call successors, (250) [2024-11-19 21:17:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1476 transitions. [2024-11-19 21:17:25,649 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1476 transitions. Word has length 66 [2024-11-19 21:17:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:25,649 INFO L471 AbstractCegarLoop]: Abstraction has 1099 states and 1476 transitions. [2024-11-19 21:17:25,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 21:17:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1476 transitions. [2024-11-19 21:17:25,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-19 21:17:25,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:25,650 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:25,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 21:17:25,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:25,851 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:25,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:25,851 INFO L85 PathProgramCache]: Analyzing trace with hash -191939833, now seen corresponding path program 1 times [2024-11-19 21:17:25,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:25,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776335750] [2024-11-19 21:17:25,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:25,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:25,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952852310] [2024-11-19 21:17:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:25,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:25,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:25,864 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:25,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 21:17:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:25,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-19 21:17:25,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-19 21:17:26,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-19 21:17:26,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:26,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776335750] [2024-11-19 21:17:26,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:26,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952852310] [2024-11-19 21:17:26,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952852310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:26,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:17:26,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-11-19 21:17:26,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086816937] [2024-11-19 21:17:26,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:26,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 21:17:26,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:26,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 21:17:26,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-11-19 21:17:26,855 INFO L87 Difference]: Start difference. First operand 1099 states and 1476 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-19 21:17:29,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:29,682 INFO L93 Difference]: Finished difference Result 1234 states and 1646 transitions. [2024-11-19 21:17:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-19 21:17:29,683 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 77 [2024-11-19 21:17:29,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:29,687 INFO L225 Difference]: With dead ends: 1234 [2024-11-19 21:17:29,687 INFO L226 Difference]: Without dead ends: 1227 [2024-11-19 21:17:29,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-11-19 21:17:29,688 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 280 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:29,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 932 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-19 21:17:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2024-11-19 21:17:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1190. [2024-11-19 21:17:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 832 states have (on average 1.2487980769230769) internal successors, (1039), 834 states have internal predecessors, (1039), 276 states have call successors, (276), 81 states have call predecessors, (276), 81 states have return successors, (274), 274 states have call predecessors, (274), 274 states have call successors, (274) [2024-11-19 21:17:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1589 transitions. [2024-11-19 21:17:29,968 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1589 transitions. Word has length 77 [2024-11-19 21:17:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:29,968 INFO L471 AbstractCegarLoop]: Abstraction has 1190 states and 1589 transitions. [2024-11-19 21:17:29,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-19 21:17:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1589 transitions. [2024-11-19 21:17:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-19 21:17:29,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:29,969 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:29,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-19 21:17:30,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-19 21:17:30,174 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:30,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1411657149, now seen corresponding path program 1 times [2024-11-19 21:17:30,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:30,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717767057] [2024-11-19 21:17:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:30,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:30,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951023002] [2024-11-19 21:17:30,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:30,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:30,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:30,189 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:30,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 21:17:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:30,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-19 21:17:30,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-19 21:17:30,606 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:30,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:30,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717767057] [2024-11-19 21:17:30,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:30,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951023002] [2024-11-19 21:17:30,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951023002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:17:30,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 21:17:30,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-19 21:17:30,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350077464] [2024-11-19 21:17:30,729 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:30,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 21:17:30,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:30,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 21:17:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-11-19 21:17:30,730 INFO L87 Difference]: Start difference. First operand 1190 states and 1589 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-19 21:17:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:31,280 INFO L93 Difference]: Finished difference Result 1294 states and 1747 transitions. [2024-11-19 21:17:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 21:17:31,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 89 [2024-11-19 21:17:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:31,284 INFO L225 Difference]: With dead ends: 1294 [2024-11-19 21:17:31,284 INFO L226 Difference]: Without dead ends: 1292 [2024-11-19 21:17:31,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2024-11-19 21:17:31,285 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 105 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:31,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 465 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 21:17:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2024-11-19 21:17:31,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1244. [2024-11-19 21:17:31,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 869 states have (on average 1.2589182968929804) internal successors, (1094), 871 states have internal predecessors, (1094), 292 states have call successors, (292), 82 states have call predecessors, (292), 82 states have return successors, (290), 290 states have call predecessors, (290), 290 states have call successors, (290) [2024-11-19 21:17:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1676 transitions. [2024-11-19 21:17:31,573 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1676 transitions. Word has length 89 [2024-11-19 21:17:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:31,574 INFO L471 AbstractCegarLoop]: Abstraction has 1244 states and 1676 transitions. [2024-11-19 21:17:31,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-19 21:17:31,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1676 transitions. [2024-11-19 21:17:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-19 21:17:31,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:31,575 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:31,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-19 21:17:31,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:31,775 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:31,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:31,776 INFO L85 PathProgramCache]: Analyzing trace with hash -558295812, now seen corresponding path program 2 times [2024-11-19 21:17:31,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:31,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803832081] [2024-11-19 21:17:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:31,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:31,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30416510] [2024-11-19 21:17:31,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:17:31,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:31,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:31,792 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:31,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 21:17:31,854 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:17:31,854 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:17:31,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 21:17:31,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-19 21:17:32,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-19 21:17:32,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:32,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803832081] [2024-11-19 21:17:32,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:32,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30416510] [2024-11-19 21:17:32,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30416510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:32,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:17:32,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-11-19 21:17:32,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668354009] [2024-11-19 21:17:32,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:32,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 21:17:32,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:32,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 21:17:32,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-11-19 21:17:32,288 INFO L87 Difference]: Start difference. First operand 1244 states and 1676 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-19 21:17:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:33,612 INFO L93 Difference]: Finished difference Result 2149 states and 3151 transitions. [2024-11-19 21:17:33,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 21:17:33,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 92 [2024-11-19 21:17:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:33,620 INFO L225 Difference]: With dead ends: 2149 [2024-11-19 21:17:33,620 INFO L226 Difference]: Without dead ends: 2145 [2024-11-19 21:17:33,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-11-19 21:17:33,621 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 202 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:33,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 504 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 21:17:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2024-11-19 21:17:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1977. [2024-11-19 21:17:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1237 states have (on average 1.3484236054971706) internal successors, (1668), 1238 states have internal predecessors, (1668), 648 states have call successors, (648), 92 states have call predecessors, (648), 91 states have return successors, (646), 646 states have call predecessors, (646), 646 states have call successors, (646) [2024-11-19 21:17:34,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2962 transitions. [2024-11-19 21:17:34,339 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2962 transitions. Word has length 92 [2024-11-19 21:17:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:34,339 INFO L471 AbstractCegarLoop]: Abstraction has 1977 states and 2962 transitions. [2024-11-19 21:17:34,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-19 21:17:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2962 transitions. [2024-11-19 21:17:34,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-19 21:17:34,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:34,341 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:34,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-19 21:17:34,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:34,544 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:34,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:34,545 INFO L85 PathProgramCache]: Analyzing trace with hash 704622192, now seen corresponding path program 1 times [2024-11-19 21:17:34,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:34,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212348661] [2024-11-19 21:17:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:34,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:34,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:34,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:34,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-19 21:17:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:34,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-19 21:17:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:34,702 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-19 21:17:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:34,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-19 21:17:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:34,705 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-11-19 21:17:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:34,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-19 21:17:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:34,708 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-11-19 21:17:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:34,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-11-19 21:17:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-19 21:17:34,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:34,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212348661] [2024-11-19 21:17:34,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212348661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:17:34,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247310233] [2024-11-19 21:17:34,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:34,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:34,714 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:34,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 21:17:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:34,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 21:17:34,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-19 21:17:34,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-19 21:17:34,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247310233] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:34,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:17:34,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 13 [2024-11-19 21:17:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985645208] [2024-11-19 21:17:34,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:34,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 21:17:34,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:34,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 21:17:34,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-11-19 21:17:34,949 INFO L87 Difference]: Start difference. First operand 1977 states and 2962 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-19 21:17:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:35,763 INFO L93 Difference]: Finished difference Result 2821 states and 4393 transitions. [2024-11-19 21:17:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 21:17:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 93 [2024-11-19 21:17:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:35,771 INFO L225 Difference]: With dead ends: 2821 [2024-11-19 21:17:35,771 INFO L226 Difference]: Without dead ends: 2001 [2024-11-19 21:17:35,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 194 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2024-11-19 21:17:35,774 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 139 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:35,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 230 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:17:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2024-11-19 21:17:36,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1999. [2024-11-19 21:17:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1259 states have (on average 1.334392374900715) internal successors, (1680), 1260 states have internal predecessors, (1680), 648 states have call successors, (648), 92 states have call predecessors, (648), 91 states have return successors, (646), 646 states have call predecessors, (646), 646 states have call successors, (646) [2024-11-19 21:17:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 2974 transitions. [2024-11-19 21:17:36,498 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 2974 transitions. Word has length 93 [2024-11-19 21:17:36,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:36,498 INFO L471 AbstractCegarLoop]: Abstraction has 1999 states and 2974 transitions. [2024-11-19 21:17:36,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-19 21:17:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 2974 transitions. [2024-11-19 21:17:36,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-19 21:17:36,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:36,500 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:36,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-19 21:17:36,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:36,705 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:36,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:36,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1736118861, now seen corresponding path program 3 times [2024-11-19 21:17:36,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:36,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801654997] [2024-11-19 21:17:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:36,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:17:36,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012490906] [2024-11-19 21:17:36,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 21:17:36,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:36,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:36,720 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:36,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 21:17:36,768 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 21:17:36,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:17:36,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-19 21:17:36,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-19 21:17:37,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-11-19 21:17:38,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:38,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801654997] [2024-11-19 21:17:38,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:17:38,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012490906] [2024-11-19 21:17:38,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012490906] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:38,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:17:38,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2024-11-19 21:17:38,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409281832] [2024-11-19 21:17:38,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:38,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-19 21:17:38,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:38,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-19 21:17:38,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-11-19 21:17:38,240 INFO L87 Difference]: Start difference. First operand 1999 states and 2974 transitions. Second operand has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-19 21:17:47,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-19 21:17:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:17:57,750 INFO L93 Difference]: Finished difference Result 3896 states and 6184 transitions. [2024-11-19 21:17:57,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-19 21:17:57,751 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 94 [2024-11-19 21:17:57,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:17:57,765 INFO L225 Difference]: With dead ends: 3896 [2024-11-19 21:17:57,765 INFO L226 Difference]: Without dead ends: 3894 [2024-11-19 21:17:57,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4424 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=2608, Invalid=10048, Unknown=0, NotChecked=0, Total=12656 [2024-11-19 21:17:57,769 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 561 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 400 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1538 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:17:57,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1538 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 1328 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2024-11-19 21:17:57,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2024-11-19 21:17:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 2455. [2024-11-19 21:17:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 1567 states have (on average 1.3631142310146778) internal successors, (2136), 1568 states have internal predecessors, (2136), 784 states have call successors, (784), 104 states have call predecessors, (784), 103 states have return successors, (782), 782 states have call predecessors, (782), 782 states have call successors, (782) [2024-11-19 21:17:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 3702 transitions. [2024-11-19 21:17:59,030 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 3702 transitions. Word has length 94 [2024-11-19 21:17:59,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:17:59,030 INFO L471 AbstractCegarLoop]: Abstraction has 2455 states and 3702 transitions. [2024-11-19 21:17:59,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-19 21:17:59,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 3702 transitions. [2024-11-19 21:17:59,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-19 21:17:59,031 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:17:59,032 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:17:59,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-19 21:17:59,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-19 21:17:59,232 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:17:59,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:17:59,233 INFO L85 PathProgramCache]: Analyzing trace with hash 403460013, now seen corresponding path program 3 times [2024-11-19 21:17:59,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:17:59,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171094165] [2024-11-19 21:17:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:17:59,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:17:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:59,417 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 21:17:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:59,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 21:17:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:59,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-19 21:17:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:59,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-19 21:17:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:59,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-19 21:17:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:59,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-19 21:17:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:59,427 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-11-19 21:17:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:59,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-19 21:17:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:59,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-19 21:17:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:59,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-19 21:17:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:17:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-19 21:17:59,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:17:59,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171094165] [2024-11-19 21:17:59,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171094165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:17:59,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188301979] [2024-11-19 21:17:59,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 21:17:59,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:17:59,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:17:59,437 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:17:59,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 21:17:59,482 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 21:17:59,483 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:17:59,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 21:17:59,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:17:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-19 21:17:59,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:17:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-19 21:17:59,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188301979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:17:59,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:17:59,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 14 [2024-11-19 21:17:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041663067] [2024-11-19 21:17:59,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:17:59,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 21:17:59,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:17:59,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 21:17:59,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2024-11-19 21:17:59,644 INFO L87 Difference]: Start difference. First operand 2455 states and 3702 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-19 21:18:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:18:00,192 INFO L93 Difference]: Finished difference Result 2995 states and 4468 transitions. [2024-11-19 21:18:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 21:18:00,193 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 93 [2024-11-19 21:18:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:18:00,198 INFO L225 Difference]: With dead ends: 2995 [2024-11-19 21:18:00,198 INFO L226 Difference]: Without dead ends: 1395 [2024-11-19 21:18:00,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 194 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2024-11-19 21:18:00,202 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 175 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:18:00,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 450 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:18:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2024-11-19 21:18:00,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 932. [2024-11-19 21:18:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 666 states have (on average 1.1141141141141142) internal successors, (742), 676 states have internal predecessors, (742), 166 states have call successors, (166), 100 states have call predecessors, (166), 99 states have return successors, (164), 155 states have call predecessors, (164), 164 states have call successors, (164) [2024-11-19 21:18:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1072 transitions. [2024-11-19 21:18:00,504 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1072 transitions. Word has length 93 [2024-11-19 21:18:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:18:00,505 INFO L471 AbstractCegarLoop]: Abstraction has 932 states and 1072 transitions. [2024-11-19 21:18:00,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-19 21:18:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1072 transitions. [2024-11-19 21:18:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-19 21:18:00,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:18:00,506 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:18:00,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-19 21:18:00,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-19 21:18:00,711 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:18:00,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:18:00,711 INFO L85 PathProgramCache]: Analyzing trace with hash 784770345, now seen corresponding path program 2 times [2024-11-19 21:18:00,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:18:00,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875710885] [2024-11-19 21:18:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:18:00,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:18:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:18:00,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91353369] [2024-11-19 21:18:00,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:18:00,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:18:00,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:18:00,738 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:18:00,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-19 21:18:00,788 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:18:00,789 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-19 21:18:00,789 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 21:18:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 21:18:00,850 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 21:18:00,851 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 21:18:00,851 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-19 21:18:00,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-19 21:18:01,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-19 21:18:01,055 INFO L407 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:18:01,095 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-19 21:18:01,097 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 09:18:01 BoogieIcfgContainer [2024-11-19 21:18:01,097 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-19 21:18:01,097 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-19 21:18:01,097 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-19 21:18:01,097 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-19 21:18:01,098 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:17:06" (3/4) ... [2024-11-19 21:18:01,098 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-19 21:18:01,161 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-19 21:18:01,161 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-19 21:18:01,162 INFO L158 Benchmark]: Toolchain (without parser) took 55650.61ms. Allocated memory was 182.5MB in the beginning and 799.0MB in the end (delta: 616.6MB). Free memory was 152.3MB in the beginning and 619.8MB in the end (delta: -467.5MB). Peak memory consumption was 147.2MB. Max. memory is 16.1GB. [2024-11-19 21:18:01,162 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 104.9MB. Free memory is still 75.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-19 21:18:01,162 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.88ms. Allocated memory is still 182.5MB. Free memory was 151.3MB in the beginning and 137.8MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-19 21:18:01,162 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.41ms. Allocated memory is still 182.5MB. Free memory was 137.8MB in the beginning and 135.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-19 21:18:01,162 INFO L158 Benchmark]: Boogie Preprocessor took 31.65ms. Allocated memory is still 182.5MB. Free memory was 135.7MB in the beginning and 134.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-19 21:18:01,162 INFO L158 Benchmark]: RCFGBuilder took 289.90ms. Allocated memory is still 182.5MB. Free memory was 134.7MB in the beginning and 147.4MB in the end (delta: -12.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-19 21:18:01,162 INFO L158 Benchmark]: TraceAbstraction took 55006.07ms. Allocated memory was 182.5MB in the beginning and 799.0MB in the end (delta: 616.6MB). Free memory was 146.4MB in the beginning and 625.0MB in the end (delta: -478.6MB). Peak memory consumption was 141.1MB. Max. memory is 16.1GB. [2024-11-19 21:18:01,162 INFO L158 Benchmark]: Witness Printer took 63.98ms. Allocated memory is still 799.0MB. Free memory was 625.0MB in the beginning and 619.8MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-19 21:18:01,163 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 104.9MB. Free memory is still 75.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.88ms. Allocated memory is still 182.5MB. Free memory was 151.3MB in the beginning and 137.8MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.41ms. Allocated memory is still 182.5MB. Free memory was 137.8MB in the beginning and 135.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.65ms. Allocated memory is still 182.5MB. Free memory was 135.7MB in the beginning and 134.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 289.90ms. Allocated memory is still 182.5MB. Free memory was 134.7MB in the beginning and 147.4MB in the end (delta: -12.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 55006.07ms. Allocated memory was 182.5MB in the beginning and 799.0MB in the end (delta: 616.6MB). Free memory was 146.4MB in the beginning and 625.0MB in the end (delta: -478.6MB). Peak memory consumption was 141.1MB. Max. memory is 16.1GB. * Witness Printer took 63.98ms. Allocated memory is still 799.0MB. Free memory was 625.0MB in the beginning and 619.8MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=3, y=5] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=3, y=5] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=3, b=5, counter=0, p=1, q=0, r=0, s=1, x=3, y=5] [L34] EXPR counter++ VAL [a=3, b=5, counter=1, p=1, q=0, r=0, s=1, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=3, b=5, c=3, counter=1, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] EXPR counter++ VAL [a=3, b=5, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=3, b=5, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ VAL [a=5, b=3, counter=3, p=0, q=1, r=1, s=0, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=5, b=3, c=5, counter=3, k=0, p=0, q=1, r=1, s=0, x=3, y=5] [L41] EXPR counter++ VAL [a=5, b=3, c=5, counter=4, k=0, p=0, q=1, r=1, s=0, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=5, b=3, c=5, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L48] EXPR counter++ VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L59] c = c - v [L60] k = k + d [L41] EXPR counter++ VAL [a=5, b=3, c=2, counter=6, k=1, p=0, q=1, r=1, s=0, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=5, b=3, c=2, counter=6, k=1, p=0, q=1, r=1, s=0, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ VAL [a=3, b=2, counter=7, p=1, q=-1, r=0, s=1, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=3, b=2, c=3, counter=7, k=0, p=1, q=-1, r=0, s=1, x=3, y=5] [L41] EXPR counter++ VAL [a=3, b=2, c=3, counter=8, k=0, p=1, q=-1, r=0, s=1, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=3, b=2, c=3, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L48] EXPR counter++ VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L59] c = c - v [L60] k = k + d [L41] EXPR counter++ VAL [a=3, b=2, c=1, counter=10, k=1, p=1, q=-1, r=0, s=1, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=3, b=2, c=1, counter=10, k=1, p=1, q=-1, r=0, s=1, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ VAL [a=2, b=1, counter=11, p=-1, q=2, r=1, s=-1, x=3, y=5] [L34] COND FALSE !(counter++<10) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, counter=11] [L11] COND TRUE !(cond) VAL [\old(cond)=0, counter=11] [L13] reach_error() VAL [\old(cond)=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 54.9s, OverallIterations: 29, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 35.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 3172 SdHoareTripleChecker+Valid, 13.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3079 mSDsluCounter, 9688 SdHoareTripleChecker+Invalid, 12.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8255 mSDsCounter, 1437 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5926 IncrementalHoareTripleChecker+Invalid, 7364 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1437 mSolverCounterUnsat, 1433 mSDtfsCounter, 5926 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2495 GetRequests, 1926 SyntacticMatches, 35 SemanticMatches, 534 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7377 ImplicationChecksByTransitivity, 18.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2455occurred in iteration=27, InterpolantAutomatonStates: 454, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.0s AutomataMinimizationTime, 28 MinimizatonAttempts, 2916 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 2751 NumberOfCodeBlocks, 2701 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 2568 ConstructedInterpolants, 16 QuantifiedInterpolants, 14851 SizeOfPredicates, 69 NumberOfNonLiveVariables, 3439 ConjunctsInSsa, 520 ConjunctsInUnsatCore, 49 InterpolantComputations, 12 PerfectInterpolantSequences, 2896/3519 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-19 21:18:01,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE