./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 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/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-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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-dev-84cfde4 [2024-10-11 02:09:24,845 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 02:09:24,927 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 02:09:24,931 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 02:09:24,932 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 02:09:24,960 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 02:09:24,961 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 02:09:24,961 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 02:09:24,961 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 02:09:24,962 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 02:09:24,962 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 02:09:24,962 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 02:09:24,962 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 02:09:24,963 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 02:09:24,963 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 02:09:24,963 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 02:09:24,963 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 02:09:24,964 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 02:09:24,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 02:09:24,964 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 02:09:24,964 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 02:09:24,967 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 02:09:24,967 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 02:09:24,967 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 02:09:24,967 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 02:09:24,968 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 02:09:24,968 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 02:09:24,968 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 02:09:24,968 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 02:09:24,969 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 02:09:24,969 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 02:09:24,969 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 02:09:24,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:09:24,969 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 02:09:24,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 02:09:24,970 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 02:09:24,970 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 02:09:24,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 02:09:24,970 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 02:09:24,971 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 02:09:24,971 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 02:09:24,971 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 02:09:24,971 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef [2024-10-11 02:09:25,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 02:09:25,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 02:09:25,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 02:09:25,388 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 02:09:25,388 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 02:09:25,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2024-10-11 02:09:26,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 02:09:26,953 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 02:09:26,953 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2024-10-11 02:09:26,959 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/962091038/8eabe8f094dc4d5db0d6b4976403e694/FLAG7c4293100 [2024-10-11 02:09:27,348 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/962091038/8eabe8f094dc4d5db0d6b4976403e694 [2024-10-11 02:09:27,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 02:09:27,351 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 02:09:27,353 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 02:09:27,353 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 02:09:27,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 02:09:27,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a45c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27, skipping insertion in model container [2024-10-11 02:09:27,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,374 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 02:09:27,574 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2024-10-11 02:09:27,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:09:27,624 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 02:09:27,644 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2024-10-11 02:09:27,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:09:27,672 INFO L204 MainTranslator]: Completed translation [2024-10-11 02:09:27,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27 WrapperNode [2024-10-11 02:09:27,673 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 02:09:27,674 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 02:09:27,674 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 02:09:27,674 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 02:09:27,679 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,685 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,704 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 94 [2024-10-11 02:09:27,706 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 02:09:27,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 02:09:27,706 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 02:09:27,707 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 02:09:27,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,716 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,725 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]. [2024-10-11 02:09:27,725 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,726 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,728 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,734 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,735 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,736 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,741 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 02:09:27,742 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 02:09:27,742 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 02:09:27,742 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 02:09:27,743 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (1/1) ... [2024-10-11 02:09:27,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:09:27,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:27,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 02:09:27,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 02:09:27,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 02:09:27,828 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-11 02:09:27,828 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-11 02:09:27,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 02:09:27,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 02:09:27,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 02:09:27,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 02:09:27,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 02:09:27,906 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 02:09:27,908 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 02:09:28,049 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-11 02:09:28,050 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 02:09:28,068 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 02:09:28,068 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 02:09:28,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:09:28 BoogieIcfgContainer [2024-10-11 02:09:28,069 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 02:09:28,070 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 02:09:28,071 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 02:09:28,073 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 02:09:28,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:09:27" (1/3) ... [2024-10-11 02:09:28,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c7a7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:09:28, skipping insertion in model container [2024-10-11 02:09:28,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:27" (2/3) ... [2024-10-11 02:09:28,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c7a7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:09:28, skipping insertion in model container [2024-10-11 02:09:28,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:09:28" (3/3) ... [2024-10-11 02:09:28,075 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2024-10-11 02:09:28,088 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 02:09:28,089 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 02:09:28,160 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 02:09:28,246 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;@67c22858, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 02:09:28,246 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 02:09:28,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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) [2024-10-11 02:09:28,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 02:09:28,258 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:28,258 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:28,259 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:28,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash -832436526, now seen corresponding path program 1 times [2024-10-11 02:09:28,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:28,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237195422] [2024-10-11 02:09:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:28,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:28,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:28,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:28,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:28,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237195422] [2024-10-11 02:09:28,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237195422] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:28,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:28,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 02:09:28,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526216066] [2024-10-11 02:09:28,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:28,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 02:09:28,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:28,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 02:09:28,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:09:28,472 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-11 02:09:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:28,503 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2024-10-11 02:09:28,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 02:09:28,507 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 17 [2024-10-11 02:09:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:28,520 INFO L225 Difference]: With dead ends: 62 [2024-10-11 02:09:28,520 INFO L226 Difference]: Without dead ends: 30 [2024-10-11 02:09:28,523 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 [2024-10-11 02:09:28,526 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:28,529 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-11 02:09:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-11 02:09:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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) [2024-10-11 02:09:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2024-10-11 02:09:28,561 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 17 [2024-10-11 02:09:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:28,561 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2024-10-11 02:09:28,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-11 02:09:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2024-10-11 02:09:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-11 02:09:28,563 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:28,563 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:28,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 02:09:28,563 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:28,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:28,564 INFO L85 PathProgramCache]: Analyzing trace with hash 958862887, now seen corresponding path program 1 times [2024-10-11 02:09:28,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:28,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408117947] [2024-10-11 02:09:28,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:28,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:28,682 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:28,691 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:28,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:28,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408117947] [2024-10-11 02:09:28,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408117947] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:28,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:28,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 02:09:28,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764947168] [2024-10-11 02:09:28,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:28,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 02:09:28,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:28,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 02:09:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 02:09:28,701 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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), 1 states have call successors, (2) [2024-10-11 02:09:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:28,722 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2024-10-11 02:09:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 02:09:28,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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), 1 states have call successors, (2) Word has length 18 [2024-10-11 02:09:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:28,723 INFO L225 Difference]: With dead ends: 39 [2024-10-11 02:09:28,723 INFO L226 Difference]: Without dead ends: 32 [2024-10-11 02:09:28,723 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 [2024-10-11 02:09:28,725 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:28,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 100 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-11 02:09:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-11 02:09:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 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) [2024-10-11 02:09:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-10-11 02:09:28,734 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2024-10-11 02:09:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:28,735 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-10-11 02:09:28,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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), 1 states have call successors, (2) [2024-10-11 02:09:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-10-11 02:09:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 02:09:28,736 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:28,736 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:28,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 02:09:28,736 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:28,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:28,737 INFO L85 PathProgramCache]: Analyzing trace with hash -359656705, now seen corresponding path program 1 times [2024-10-11 02:09:28,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:28,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096226965] [2024-10-11 02:09:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:28,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:28,819 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:28,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 02:09:28,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:28,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096226965] [2024-10-11 02:09:28,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096226965] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:28,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:28,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 02:09:28,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770624694] [2024-10-11 02:09:28,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:28,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 02:09:28,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:28,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 02:09:28,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:28,861 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2024-10-11 02:09:28,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:28,931 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2024-10-11 02:09:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:09:28,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 19 [2024-10-11 02:09:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:28,932 INFO L225 Difference]: With dead ends: 52 [2024-10-11 02:09:28,933 INFO L226 Difference]: Without dead ends: 45 [2024-10-11 02:09:28,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:09:28,935 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:28,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 130 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-11 02:09:28,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2024-10-11 02:09:28,944 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) [2024-10-11 02:09:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-10-11 02:09:28,947 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2024-10-11 02:09:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:28,948 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-10-11 02:09:28,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2024-10-11 02:09:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-10-11 02:09:28,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-11 02:09:28,950 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:28,950 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] [2024-10-11 02:09:28,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 02:09:28,950 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:28,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1735129581, now seen corresponding path program 1 times [2024-10-11 02:09:28,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:28,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466723639] [2024-10-11 02:09:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:28,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:29,023 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:29,033 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:29,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:29,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466723639] [2024-10-11 02:09:29,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466723639] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:29,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:29,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 02:09:29,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027388536] [2024-10-11 02:09:29,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:29,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 02:09:29,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:29,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 02:09:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:29,047 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2024-10-11 02:09:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:29,090 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2024-10-11 02:09:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:09:29,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 24 [2024-10-11 02:09:29,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:29,091 INFO L225 Difference]: With dead ends: 57 [2024-10-11 02:09:29,091 INFO L226 Difference]: Without dead ends: 35 [2024-10-11 02:09:29,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:29,093 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:29,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 126 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-11 02:09:29,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-11 02:09:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 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) [2024-10-11 02:09:29,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-10-11 02:09:29,098 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 24 [2024-10-11 02:09:29,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:29,098 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-10-11 02:09:29,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2024-10-11 02:09:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-10-11 02:09:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-11 02:09:29,099 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:29,099 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] [2024-10-11 02:09:29,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 02:09:29,099 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:29,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash 150917056, now seen corresponding path program 1 times [2024-10-11 02:09:29,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:29,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038526563] [2024-10-11 02:09:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:29,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:29,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071348373] [2024-10-11 02:09:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:29,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:29,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:29,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:29,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 02:09:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:29,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:09:29,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:29,291 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:09:29,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:29,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038526563] [2024-10-11 02:09:29,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:29,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071348373] [2024-10-11 02:09:29,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071348373] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:29,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:29,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:29,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62289743] [2024-10-11 02:09:29,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:29,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:29,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:29,294 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-10-11 02:09:29,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:29,339 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2024-10-11 02:09:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:09:29,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 24 [2024-10-11 02:09:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:29,341 INFO L225 Difference]: With dead ends: 53 [2024-10-11 02:09:29,342 INFO L226 Difference]: Without dead ends: 51 [2024-10-11 02:09:29,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:29,343 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:29,344 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 131 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-11 02:09:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-10-11 02:09:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 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) [2024-10-11 02:09:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2024-10-11 02:09:29,358 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 24 [2024-10-11 02:09:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:29,359 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2024-10-11 02:09:29,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-10-11 02:09:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2024-10-11 02:09:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 02:09:29,360 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:29,360 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] [2024-10-11 02:09:29,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:29,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:29,564 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:29,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:29,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1833090586, now seen corresponding path program 1 times [2024-10-11 02:09:29,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:29,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671967532] [2024-10-11 02:09:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:29,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:29,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:29,680 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:29,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:29,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671967532] [2024-10-11 02:09:29,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671967532] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:29,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140447761] [2024-10-11 02:09:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:29,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:29,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:29,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:29,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 02:09:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:29,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:09:29,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:29,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:29,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140447761] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:29,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:09:29,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-10-11 02:09:29,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096250850] [2024-10-11 02:09:29,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:29,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 02:09:29,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:29,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 02:09:29,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-10-11 02:09:29,860 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 02:09:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:29,971 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2024-10-11 02:09:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 02:09:29,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2024-10-11 02:09:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:29,974 INFO L225 Difference]: With dead ends: 146 [2024-10-11 02:09:29,974 INFO L226 Difference]: Without dead ends: 139 [2024-10-11 02:09:29,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-10-11 02:09:29,975 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:29,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 220 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:29,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-11 02:09:29,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 96. [2024-10-11 02:09:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.338235294117647) internal successors, (91), 70 states have internal predecessors, (91), 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) [2024-10-11 02:09:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2024-10-11 02:09:29,991 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 25 [2024-10-11 02:09:29,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:29,991 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2024-10-11 02:09:29,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 02:09:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2024-10-11 02:09:29,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 02:09:29,992 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:29,992 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] [2024-10-11 02:09:30,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 02:09:30,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:30,197 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:30,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:30,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1010868448, now seen corresponding path program 1 times [2024-10-11 02:09:30,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:30,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437917613] [2024-10-11 02:09:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:30,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:30,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:30,271 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 02:09:30,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:30,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437917613] [2024-10-11 02:09:30,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437917613] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:30,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16878849] [2024-10-11 02:09:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:30,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:30,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:30,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:30,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 02:09:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:30,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:09:30,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 02:09:30,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 02:09:30,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16878849] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:30,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:09:30,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-11 02:09:30,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36874095] [2024-10-11 02:09:30,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:30,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 02:09:30,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:30,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 02:09:30,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-11 02:09:30,392 INFO L87 Difference]: Start difference. First operand 96 states and 129 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2024-10-11 02:09:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:30,546 INFO L93 Difference]: Finished difference Result 182 states and 260 transitions. [2024-10-11 02:09:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 02:09:30,546 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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 26 [2024-10-11 02:09:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:30,547 INFO L225 Difference]: With dead ends: 182 [2024-10-11 02:09:30,547 INFO L226 Difference]: Without dead ends: 170 [2024-10-11 02:09:30,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-10-11 02:09:30,548 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 112 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:30,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 275 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-11 02:09:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2024-10-11 02:09:30,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 96 states have (on average 1.3541666666666667) internal successors, (130), 97 states have internal predecessors, (130), 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) [2024-10-11 02:09:30,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2024-10-11 02:09:30,564 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 26 [2024-10-11 02:09:30,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:30,564 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2024-10-11 02:09:30,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2024-10-11 02:09:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2024-10-11 02:09:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 02:09:30,565 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:30,565 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] [2024-10-11 02:09:30,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 02:09:30,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:30,766 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:30,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:30,767 INFO L85 PathProgramCache]: Analyzing trace with hash 2130442992, now seen corresponding path program 1 times [2024-10-11 02:09:30,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:30,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894305617] [2024-10-11 02:09:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:30,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:30,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437218863] [2024-10-11 02:09:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:30,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:30,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:30,791 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:30,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 02:09:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:30,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:09:30,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:30,910 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:09:30,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:30,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894305617] [2024-10-11 02:09:30,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:30,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437218863] [2024-10-11 02:09:30,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437218863] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:30,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:30,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:30,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289411231] [2024-10-11 02:09:30,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:30,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:30,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:30,914 INFO L87 Difference]: Start difference. First operand 127 states and 175 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2024-10-11 02:09:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:30,967 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2024-10-11 02:09:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:09:30,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 29 [2024-10-11 02:09:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:30,969 INFO L225 Difference]: With dead ends: 142 [2024-10-11 02:09:30,969 INFO L226 Difference]: Without dead ends: 140 [2024-10-11 02:09:30,969 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:30,971 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:30,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 129 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:30,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-11 02:09:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2024-10-11 02:09:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 105 states have (on average 1.3238095238095238) internal successors, (139), 106 states have internal predecessors, (139), 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) [2024-10-11 02:09:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2024-10-11 02:09:31,019 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 29 [2024-10-11 02:09:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:31,020 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2024-10-11 02:09:31,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2024-10-11 02:09:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2024-10-11 02:09:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-11 02:09:31,022 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:31,022 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] [2024-10-11 02:09:31,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 02:09:31,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 02:09:31,223 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:31,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:31,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2110713919, now seen corresponding path program 1 times [2024-10-11 02:09:31,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:31,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315445233] [2024-10-11 02:09:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:31,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:31,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690926816] [2024-10-11 02:09:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:31,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:31,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:31,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:31,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 02:09:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:31,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 02:09:31,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:31,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:31,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:31,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315445233] [2024-10-11 02:09:31,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:31,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690926816] [2024-10-11 02:09:31,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690926816] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:31,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:09:31,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-10-11 02:09:31,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437395544] [2024-10-11 02:09:31,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:31,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 02:09:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:31,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 02:09:31,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:09:31,501 INFO L87 Difference]: Start difference. First operand 139 states and 184 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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) [2024-10-11 02:09:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:31,664 INFO L93 Difference]: Finished difference Result 174 states and 236 transitions. [2024-10-11 02:09:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:09:31,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 31 [2024-10-11 02:09:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:31,666 INFO L225 Difference]: With dead ends: 174 [2024-10-11 02:09:31,666 INFO L226 Difference]: Without dead ends: 172 [2024-10-11 02:09:31,666 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-11 02:09:31,667 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 19 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:31,667 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 294 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:31,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-10-11 02:09:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2024-10-11 02:09:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3492063492063493) internal successors, (170), 127 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) [2024-10-11 02:09:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 231 transitions. [2024-10-11 02:09:31,681 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 231 transitions. Word has length 31 [2024-10-11 02:09:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:31,681 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 231 transitions. [2024-10-11 02:09:31,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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) [2024-10-11 02:09:31,682 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 231 transitions. [2024-10-11 02:09:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-11 02:09:31,682 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:31,682 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] [2024-10-11 02:09:31,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 02:09:31,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:31,887 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:31,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:31,888 INFO L85 PathProgramCache]: Analyzing trace with hash -363027956, now seen corresponding path program 1 times [2024-10-11 02:09:31,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:31,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383692656] [2024-10-11 02:09:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:31,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:32,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:32,004 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:32,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:32,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383692656] [2024-10-11 02:09:32,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383692656] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:32,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:32,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 02:09:32,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470231853] [2024-10-11 02:09:32,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:32,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 02:09:32,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 02:09:32,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:09:32,011 INFO L87 Difference]: Start difference. First operand 169 states and 231 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2024-10-11 02:09:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:32,068 INFO L93 Difference]: Finished difference Result 236 states and 324 transitions. [2024-10-11 02:09:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 02:09:32,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 31 [2024-10-11 02:09:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:32,070 INFO L225 Difference]: With dead ends: 236 [2024-10-11 02:09:32,070 INFO L226 Difference]: Without dead ends: 169 [2024-10-11 02:09:32,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:09:32,073 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:32,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-10-11 02:09:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-10-11 02:09:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3412698412698412) internal successors, (169), 127 states have internal predecessors, (169), 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) [2024-10-11 02:09:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2024-10-11 02:09:32,106 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 31 [2024-10-11 02:09:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:32,106 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2024-10-11 02:09:32,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2024-10-11 02:09:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2024-10-11 02:09:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-11 02:09:32,109 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:32,109 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] [2024-10-11 02:09:32,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 02:09:32,110 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:32,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash -242784896, now seen corresponding path program 1 times [2024-10-11 02:09:32,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:32,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777084852] [2024-10-11 02:09:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:32,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:32,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889090147] [2024-10-11 02:09:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:32,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:32,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:32,129 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:32,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 02:09:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:32,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:09:32,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 02:09:32,218 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:09:32,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:32,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777084852] [2024-10-11 02:09:32,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:32,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889090147] [2024-10-11 02:09:32,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889090147] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:32,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:32,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:32,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621215058] [2024-10-11 02:09:32,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:32,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:32,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:32,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:32,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:32,222 INFO L87 Difference]: Start difference. First operand 169 states and 230 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2024-10-11 02:09:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:32,294 INFO L93 Difference]: Finished difference Result 234 states and 330 transitions. [2024-10-11 02:09:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:09:32,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 34 [2024-10-11 02:09:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:32,296 INFO L225 Difference]: With dead ends: 234 [2024-10-11 02:09:32,296 INFO L226 Difference]: Without dead ends: 232 [2024-10-11 02:09:32,296 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:32,297 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:32,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-10-11 02:09:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2024-10-11 02:09:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 159 states have (on average 1.371069182389937) internal successors, (218), 160 states have internal predecessors, (218), 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) [2024-10-11 02:09:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 319 transitions. [2024-10-11 02:09:32,321 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 319 transitions. Word has length 34 [2024-10-11 02:09:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:32,322 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 319 transitions. [2024-10-11 02:09:32,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2024-10-11 02:09:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 319 transitions. [2024-10-11 02:09:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-11 02:09:32,323 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:32,323 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] [2024-10-11 02:09:32,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 02:09:32,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 02:09:32,524 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:32,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:32,524 INFO L85 PathProgramCache]: Analyzing trace with hash -568879, now seen corresponding path program 1 times [2024-10-11 02:09:32,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:32,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424930509] [2024-10-11 02:09:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:32,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:32,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788032333] [2024-10-11 02:09:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:32,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:32,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:32,538 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:32,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 02:09:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:32,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 02:09:32,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 02:09:32,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:32,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:32,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424930509] [2024-10-11 02:09:32,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:32,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788032333] [2024-10-11 02:09:32,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788032333] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:32,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:09:32,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-11 02:09:32,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798509019] [2024-10-11 02:09:32,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:32,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 02:09:32,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 02:09:32,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:09:32,854 INFO L87 Difference]: Start difference. First operand 225 states and 319 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 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) [2024-10-11 02:09:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:33,040 INFO L93 Difference]: Finished difference Result 237 states and 329 transitions. [2024-10-11 02:09:33,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 02:09:33,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 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 36 [2024-10-11 02:09:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:33,044 INFO L225 Difference]: With dead ends: 237 [2024-10-11 02:09:33,046 INFO L226 Difference]: Without dead ends: 235 [2024-10-11 02:09:33,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-10-11 02:09:33,047 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 68 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:33,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 253 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-10-11 02:09:33,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2024-10-11 02:09:33,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 165 states have (on average 1.3575757575757577) internal successors, (224), 166 states have internal predecessors, (224), 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) [2024-10-11 02:09:33,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 325 transitions. [2024-10-11 02:09:33,075 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 325 transitions. Word has length 36 [2024-10-11 02:09:33,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:33,075 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 325 transitions. [2024-10-11 02:09:33,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 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) [2024-10-11 02:09:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 325 transitions. [2024-10-11 02:09:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-11 02:09:33,078 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:33,078 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] [2024-10-11 02:09:33,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 02:09:33,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:33,283 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:33,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash 895823024, now seen corresponding path program 1 times [2024-10-11 02:09:33,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:33,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779911758] [2024-10-11 02:09:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:33,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:33,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510257469] [2024-10-11 02:09:33,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:33,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:33,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:33,295 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:33,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 02:09:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:33,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:09:33,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 02:09:33,375 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:09:33,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:33,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779911758] [2024-10-11 02:09:33,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:33,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510257469] [2024-10-11 02:09:33,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510257469] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:33,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:33,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:33,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563393808] [2024-10-11 02:09:33,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:33,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:33,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:33,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:33,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:33,377 INFO L87 Difference]: Start difference. First operand 233 states and 325 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2024-10-11 02:09:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:33,444 INFO L93 Difference]: Finished difference Result 308 states and 453 transitions. [2024-10-11 02:09:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:09:33,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 39 [2024-10-11 02:09:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:33,446 INFO L225 Difference]: With dead ends: 308 [2024-10-11 02:09:33,446 INFO L226 Difference]: Without dead ends: 306 [2024-10-11 02:09:33,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:33,447 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:33,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 129 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:33,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-10-11 02:09:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 291. [2024-10-11 02:09:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 186 states have (on average 1.3602150537634408) internal successors, (253), 196 states have internal predecessors, (253), 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) [2024-10-11 02:09:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 426 transitions. [2024-10-11 02:09:33,471 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 426 transitions. Word has length 39 [2024-10-11 02:09:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:33,471 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 426 transitions. [2024-10-11 02:09:33,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2024-10-11 02:09:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 426 transitions. [2024-10-11 02:09:33,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-11 02:09:33,472 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:33,472 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] [2024-10-11 02:09:33,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:33,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 02:09:33,676 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:33,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash 184539710, now seen corresponding path program 1 times [2024-10-11 02:09:33,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:33,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325913600] [2024-10-11 02:09:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:33,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:33,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:33,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 02:09:33,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:33,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325913600] [2024-10-11 02:09:33,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325913600] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:33,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802168164] [2024-10-11 02:09:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:33,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:33,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:33,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:33,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 02:09:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:33,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:09:33,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 02:09:33,919 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 02:09:34,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802168164] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:34,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:09:34,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 14 [2024-10-11 02:09:34,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241172205] [2024-10-11 02:09:34,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:34,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 02:09:34,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:34,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 02:09:34,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2024-10-11 02:09:34,040 INFO L87 Difference]: Start difference. First operand 291 states and 426 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 02:09:34,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:34,339 INFO L93 Difference]: Finished difference Result 724 states and 1030 transitions. [2024-10-11 02:09:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 02:09:34,340 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-10-11 02:09:34,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:34,344 INFO L225 Difference]: With dead ends: 724 [2024-10-11 02:09:34,344 INFO L226 Difference]: Without dead ends: 574 [2024-10-11 02:09:34,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2024-10-11 02:09:34,345 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 141 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:34,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 230 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:09:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2024-10-11 02:09:34,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 540. [2024-10-11 02:09:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 356 states have (on average 1.300561797752809) internal successors, (463), 370 states have internal predecessors, (463), 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) [2024-10-11 02:09:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 743 transitions. [2024-10-11 02:09:34,386 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 743 transitions. Word has length 37 [2024-10-11 02:09:34,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:34,386 INFO L471 AbstractCegarLoop]: Abstraction has 540 states and 743 transitions. [2024-10-11 02:09:34,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 02:09:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 743 transitions. [2024-10-11 02:09:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 02:09:34,387 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:34,387 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] [2024-10-11 02:09:34,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 02:09:34,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:34,588 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:34,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1387261216, now seen corresponding path program 2 times [2024-10-11 02:09:34,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:34,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382662296] [2024-10-11 02:09:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:34,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:34,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:34,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:34,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:34,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382662296] [2024-10-11 02:09:34,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382662296] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:34,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:34,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:34,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741340199] [2024-10-11 02:09:34,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:34,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:34,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:34,631 INFO L87 Difference]: Start difference. First operand 540 states and 743 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2024-10-11 02:09:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:34,756 INFO L93 Difference]: Finished difference Result 788 states and 1135 transitions. [2024-10-11 02:09:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:09:34,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 38 [2024-10-11 02:09:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:34,764 INFO L225 Difference]: With dead ends: 788 [2024-10-11 02:09:34,764 INFO L226 Difference]: Without dead ends: 643 [2024-10-11 02:09:34,764 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 [2024-10-11 02:09:34,765 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 29 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:34,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 169 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2024-10-11 02:09:34,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 538. [2024-10-11 02:09:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 358 states have (on average 1.3072625698324023) internal successors, (468), 372 states have internal predecessors, (468), 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) [2024-10-11 02:09:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 740 transitions. [2024-10-11 02:09:34,872 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 740 transitions. Word has length 38 [2024-10-11 02:09:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:34,873 INFO L471 AbstractCegarLoop]: Abstraction has 538 states and 740 transitions. [2024-10-11 02:09:34,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2024-10-11 02:09:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 740 transitions. [2024-10-11 02:09:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 02:09:34,874 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:34,874 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] [2024-10-11 02:09:34,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 02:09:34,874 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:34,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:34,875 INFO L85 PathProgramCache]: Analyzing trace with hash 869918208, now seen corresponding path program 1 times [2024-10-11 02:09:34,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:34,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238532204] [2024-10-11 02:09:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:34,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:35,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:35,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:35,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:35,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238532204] [2024-10-11 02:09:35,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238532204] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:35,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185260746] [2024-10-11 02:09:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:35,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:35,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:35,013 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:35,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 02:09:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:35,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 02:09:35,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:35,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:09:35,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185260746] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:35,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:09:35,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-10-11 02:09:35,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884319466] [2024-10-11 02:09:35,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:35,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 02:09:35,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 02:09:35,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2024-10-11 02:09:35,189 INFO L87 Difference]: Start difference. First operand 538 states and 740 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 02:09:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:35,456 INFO L93 Difference]: Finished difference Result 1162 states and 1624 transitions. [2024-10-11 02:09:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 02:09:35,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2024-10-11 02:09:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:35,461 INFO L225 Difference]: With dead ends: 1162 [2024-10-11 02:09:35,461 INFO L226 Difference]: Without dead ends: 839 [2024-10-11 02:09:35,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2024-10-11 02:09:35,463 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 186 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:35,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 293 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2024-10-11 02:09:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 802. [2024-10-11 02:09:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 532 states have (on average 1.25) internal successors, (665), 554 states have internal predecessors, (665), 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) [2024-10-11 02:09:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1083 transitions. [2024-10-11 02:09:35,557 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1083 transitions. Word has length 38 [2024-10-11 02:09:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:35,557 INFO L471 AbstractCegarLoop]: Abstraction has 802 states and 1083 transitions. [2024-10-11 02:09:35,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 02:09:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1083 transitions. [2024-10-11 02:09:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-11 02:09:35,558 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:35,558 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] [2024-10-11 02:09:35,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:35,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 02:09:35,759 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:35,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:35,759 INFO L85 PathProgramCache]: Analyzing trace with hash -263121925, now seen corresponding path program 1 times [2024-10-11 02:09:35,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:35,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309212673] [2024-10-11 02:09:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:35,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:35,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043057222] [2024-10-11 02:09:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:35,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:35,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:35,771 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:35,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 02:09:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:35,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-11 02:09:35,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 02:09:36,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 02:09:37,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:37,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309212673] [2024-10-11 02:09:37,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:37,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043057222] [2024-10-11 02:09:37,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043057222] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:37,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:09:37,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-11 02:09:37,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557587679] [2024-10-11 02:09:37,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:37,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 02:09:37,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:37,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 02:09:37,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-10-11 02:09:37,413 INFO L87 Difference]: Start difference. First operand 802 states and 1083 transitions. Second operand has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 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) [2024-10-11 02:09:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:42,505 INFO L93 Difference]: Finished difference Result 1217 states and 1722 transitions. [2024-10-11 02:09:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-11 02:09:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 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 53 [2024-10-11 02:09:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:42,511 INFO L225 Difference]: With dead ends: 1217 [2024-10-11 02:09:42,511 INFO L226 Difference]: Without dead ends: 1195 [2024-10-11 02:09:42,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-10-11 02:09:42,513 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 323 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:42,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1182 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-10-11 02:09:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2024-10-11 02:09:42,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 884. [2024-10-11 02:09:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 591 states have (on average 1.2538071065989849) internal successors, (741), 611 states have internal predecessors, (741), 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) [2024-10-11 02:09:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1198 transitions. [2024-10-11 02:09:42,682 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1198 transitions. Word has length 53 [2024-10-11 02:09:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:42,682 INFO L471 AbstractCegarLoop]: Abstraction has 884 states and 1198 transitions. [2024-10-11 02:09:42,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 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) [2024-10-11 02:09:42,682 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1198 transitions. [2024-10-11 02:09:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-11 02:09:42,683 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:42,683 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] [2024-10-11 02:09:42,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 02:09:42,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 02:09:42,887 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:42,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2029616726, now seen corresponding path program 1 times [2024-10-11 02:09:42,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:42,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805866994] [2024-10-11 02:09:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:42,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:43,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:43,034 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:43,036 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-11 02:09:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:43,038 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-11 02:09:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:43,040 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-11 02:09:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:43,042 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-11 02:09:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 02:09:43,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:43,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805866994] [2024-10-11 02:09:43,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805866994] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:43,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654948045] [2024-10-11 02:09:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:43,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:43,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:43,048 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:43,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 02:09:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:43,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 02:09:43,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 02:09:43,190 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 02:09:43,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654948045] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:43,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:09:43,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 16 [2024-10-11 02:09:43,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465707514] [2024-10-11 02:09:43,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:43,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 02:09:43,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:43,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 02:09:43,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-10-11 02:09:43,289 INFO L87 Difference]: Start difference. First operand 884 states and 1198 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-10-11 02:09:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:43,598 INFO L93 Difference]: Finished difference Result 961 states and 1277 transitions. [2024-10-11 02:09:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 02:09:43,599 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 59 [2024-10-11 02:09:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:43,603 INFO L225 Difference]: With dead ends: 961 [2024-10-11 02:09:43,603 INFO L226 Difference]: Without dead ends: 939 [2024-10-11 02:09:43,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2024-10-11 02:09:43,604 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 154 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:43,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 271 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2024-10-11 02:09:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 908. [2024-10-11 02:09:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 615 states have (on average 1.2308943089430895) internal successors, (757), 635 states have internal predecessors, (757), 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) [2024-10-11 02:09:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1214 transitions. [2024-10-11 02:09:43,730 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1214 transitions. Word has length 59 [2024-10-11 02:09:43,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:43,730 INFO L471 AbstractCegarLoop]: Abstraction has 908 states and 1214 transitions. [2024-10-11 02:09:43,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-10-11 02:09:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1214 transitions. [2024-10-11 02:09:43,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-11 02:09:43,731 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:43,731 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] [2024-10-11 02:09:43,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:43,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 02:09:43,935 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:43,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:43,936 INFO L85 PathProgramCache]: Analyzing trace with hash -240119973, now seen corresponding path program 1 times [2024-10-11 02:09:43,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:43,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520530412] [2024-10-11 02:09:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:43,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:43,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:44,001 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:09:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:44,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 02:09:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:44,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-11 02:09:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:44,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-11 02:09:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:44,011 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-11 02:09:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:44,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-11 02:09:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:44,017 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-11 02:09:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-11 02:09:44,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:44,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520530412] [2024-10-11 02:09:44,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520530412] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:44,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:44,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980788557] [2024-10-11 02:09:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:44,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:44,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:44,022 INFO L87 Difference]: Start difference. First operand 908 states and 1214 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2024-10-11 02:09:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:44,224 INFO L93 Difference]: Finished difference Result 1465 states and 1976 transitions. [2024-10-11 02:09:44,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:09:44,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 61 [2024-10-11 02:09:44,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:44,232 INFO L225 Difference]: With dead ends: 1465 [2024-10-11 02:09:44,232 INFO L226 Difference]: Without dead ends: 927 [2024-10-11 02:09:44,233 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 [2024-10-11 02:09:44,234 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:44,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 126 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:44,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2024-10-11 02:09:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 903. [2024-10-11 02:09:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 630 states have (on average 1.2396825396825397) internal successors, (781), 635 states have internal predecessors, (781), 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) [2024-10-11 02:09:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1198 transitions. [2024-10-11 02:09:44,356 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1198 transitions. Word has length 61 [2024-10-11 02:09:44,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:44,356 INFO L471 AbstractCegarLoop]: Abstraction has 903 states and 1198 transitions. [2024-10-11 02:09:44,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2024-10-11 02:09:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1198 transitions. [2024-10-11 02:09:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-11 02:09:44,356 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:44,356 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] [2024-10-11 02:09:44,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-11 02:09:44,357 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:44,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:44,357 INFO L85 PathProgramCache]: Analyzing trace with hash -421215721, now seen corresponding path program 1 times [2024-10-11 02:09:44,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:44,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766895311] [2024-10-11 02:09:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:44,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:44,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927500903] [2024-10-11 02:09:44,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:44,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:44,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:44,368 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:44,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 02:09:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:44,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 02:09:44,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-10-11 02:09:44,508 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-10-11 02:09:44,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:44,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766895311] [2024-10-11 02:09:44,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:44,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927500903] [2024-10-11 02:09:44,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927500903] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:44,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:09:44,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-11 02:09:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924378960] [2024-10-11 02:09:44,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:44,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:44,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:44,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:44,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:09:44,566 INFO L87 Difference]: Start difference. First operand 903 states and 1198 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, (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) [2024-10-11 02:09:44,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:44,712 INFO L93 Difference]: Finished difference Result 925 states and 1219 transitions. [2024-10-11 02:09:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:09:44,712 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, (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 62 [2024-10-11 02:09:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:44,716 INFO L225 Difference]: With dead ends: 925 [2024-10-11 02:09:44,716 INFO L226 Difference]: Without dead ends: 923 [2024-10-11 02:09:44,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:09:44,717 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 122 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 [2024-10-11 02:09:44,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 122 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2024-10-11 02:09:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 923. [2024-10-11 02:09:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 645 states have (on average 1.2310077519379845) internal successors, (794), 650 states have internal predecessors, (794), 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) [2024-10-11 02:09:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1211 transitions. [2024-10-11 02:09:44,848 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1211 transitions. Word has length 62 [2024-10-11 02:09:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:44,848 INFO L471 AbstractCegarLoop]: Abstraction has 923 states and 1211 transitions. [2024-10-11 02:09:44,849 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, (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) [2024-10-11 02:09:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1211 transitions. [2024-10-11 02:09:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-11 02:09:44,849 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:44,849 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] [2024-10-11 02:09:44,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:45,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:45,050 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:45,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:45,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1734545172, now seen corresponding path program 1 times [2024-10-11 02:09:45,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:45,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980355897] [2024-10-11 02:09:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:45,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:45,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644435963] [2024-10-11 02:09:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:45,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:45,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:45,087 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:45,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 02:09:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:45,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-11 02:09:45,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-11 02:09:45,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-11 02:09:46,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:46,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980355897] [2024-10-11 02:09:46,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:46,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644435963] [2024-10-11 02:09:46,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644435963] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:46,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:09:46,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-11 02:09:46,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105501369] [2024-10-11 02:09:46,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:46,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 02:09:46,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 02:09:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-10-11 02:09:46,835 INFO L87 Difference]: Start difference. First operand 923 states and 1211 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 20 states have internal predecessors, (61), 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) [2024-10-11 02:09:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:52,118 INFO L93 Difference]: Finished difference Result 1138 states and 1528 transitions. [2024-10-11 02:09:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-11 02:09:52,118 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 20 states have internal predecessors, (61), 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 63 [2024-10-11 02:09:52,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:52,124 INFO L225 Difference]: With dead ends: 1138 [2024-10-11 02:09:52,124 INFO L226 Difference]: Without dead ends: 1136 [2024-10-11 02:09:52,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-10-11 02:09:52,125 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 238 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:52,126 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 646 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-10-11 02:09:52,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2024-10-11 02:09:52,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1096. [2024-10-11 02:09:52,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 770 states have (on average 1.2584415584415585) internal successors, (969), 775 states have internal predecessors, (969), 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) [2024-10-11 02:09:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1474 transitions. [2024-10-11 02:09:52,325 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1474 transitions. Word has length 63 [2024-10-11 02:09:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:52,325 INFO L471 AbstractCegarLoop]: Abstraction has 1096 states and 1474 transitions. [2024-10-11 02:09:52,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 20 states have internal predecessors, (61), 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) [2024-10-11 02:09:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1474 transitions. [2024-10-11 02:09:52,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-11 02:09:52,326 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:52,326 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] [2024-10-11 02:09:52,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 02:09:52,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-11 02:09:52,527 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:52,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:52,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2144187133, now seen corresponding path program 2 times [2024-10-11 02:09:52,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:52,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544997513] [2024-10-11 02:09:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:52,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:52,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120567449] [2024-10-11 02:09:52,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:09:52,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:52,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:52,542 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:52,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 02:09:52,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:09:52,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:09:52,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-11 02:09:52,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-11 02:09:52,793 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 02:09:52,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:52,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544997513] [2024-10-11 02:09:52,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:52,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120567449] [2024-10-11 02:09:52,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120567449] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:52,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:09:52,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2024-10-11 02:09:52,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613203914] [2024-10-11 02:09:52,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:52,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 02:09:52,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:52,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 02:09:52,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:09:52,890 INFO L87 Difference]: Start difference. First operand 1096 states and 1474 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-11 02:09:53,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:53,540 INFO L93 Difference]: Finished difference Result 1305 states and 1785 transitions. [2024-10-11 02:09:53,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 02:09:53,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2024-10-11 02:09:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:53,546 INFO L225 Difference]: With dead ends: 1305 [2024-10-11 02:09:53,546 INFO L226 Difference]: Without dead ends: 1303 [2024-10-11 02:09:53,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-10-11 02:09:53,547 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 77 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:53,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 409 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:09:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2024-10-11 02:09:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1196. [2024-10-11 02:09:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 853 states have (on average 1.2719812426729191) internal successors, (1085), 865 states have internal predecessors, (1085), 267 states have call successors, (267), 75 states have call predecessors, (267), 75 states have return successors, (262), 255 states have call predecessors, (262), 262 states have call successors, (262) [2024-10-11 02:09:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1614 transitions. [2024-10-11 02:09:53,793 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1614 transitions. Word has length 65 [2024-10-11 02:09:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:53,793 INFO L471 AbstractCegarLoop]: Abstraction has 1196 states and 1614 transitions. [2024-10-11 02:09:53,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-11 02:09:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1614 transitions. [2024-10-11 02:09:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-11 02:09:53,794 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:53,794 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] [2024-10-11 02:09:53,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:53,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:53,995 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:53,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:53,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1940891938, now seen corresponding path program 1 times [2024-10-11 02:09:53,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:53,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467669668] [2024-10-11 02:09:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:53,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:54,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50673375] [2024-10-11 02:09:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:54,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:54,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:54,026 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:54,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 02:09:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:54,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-11 02:09:54,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-10-11 02:09:54,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-10-11 02:09:56,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:56,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467669668] [2024-10-11 02:09:56,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:56,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50673375] [2024-10-11 02:09:56,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50673375] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:56,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:09:56,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-10-11 02:09:56,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20421509] [2024-10-11 02:09:56,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:56,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 02:09:56,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:56,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 02:09:56,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-10-11 02:09:56,643 INFO L87 Difference]: Start difference. First operand 1196 states and 1614 transitions. Second operand has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 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) [2024-10-11 02:10:02,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:10:02,809 INFO L93 Difference]: Finished difference Result 1327 states and 1781 transitions. [2024-10-11 02:10:02,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-11 02:10:02,809 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 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 76 [2024-10-11 02:10:02,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:10:02,814 INFO L225 Difference]: With dead ends: 1327 [2024-10-11 02:10:02,814 INFO L226 Difference]: Without dead ends: 1320 [2024-10-11 02:10:02,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-10-11 02:10:02,816 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 284 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-10-11 02:10:02,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 993 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-10-11 02:10:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2024-10-11 02:10:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1283. [2024-10-11 02:10:03,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 910 states have (on average 1.2637362637362637) internal successors, (1150), 919 states have internal predecessors, (1150), 288 states have call successors, (288), 84 states have call predecessors, (288), 84 states have return successors, (286), 279 states have call predecessors, (286), 286 states have call successors, (286) [2024-10-11 02:10:03,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1724 transitions. [2024-10-11 02:10:03,147 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1724 transitions. Word has length 76 [2024-10-11 02:10:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:10:03,147 INFO L471 AbstractCegarLoop]: Abstraction has 1283 states and 1724 transitions. [2024-10-11 02:10:03,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 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) [2024-10-11 02:10:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1724 transitions. [2024-10-11 02:10:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-11 02:10:03,149 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:10:03,149 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] [2024-10-11 02:10:03,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-11 02:10:03,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-11 02:10:03,349 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:10:03,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:10:03,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1286517375, now seen corresponding path program 1 times [2024-10-11 02:10:03,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:10:03,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402591788] [2024-10-11 02:10:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:03,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:10:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:10:03,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126170293] [2024-10-11 02:10:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:03,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:03,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:10:03,364 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:10:03,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 02:10:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:03,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-11 02:10:03,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:10:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-10-11 02:10:03,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:10:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-10-11 02:10:04,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:10:04,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402591788] [2024-10-11 02:10:04,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:10:04,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126170293] [2024-10-11 02:10:04,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126170293] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:10:04,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:10:04,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-11 02:10:04,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471829955] [2024-10-11 02:10:04,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:10:04,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 02:10:04,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:10:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 02:10:04,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-10-11 02:10:04,233 INFO L87 Difference]: Start difference. First operand 1283 states and 1724 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 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) [2024-10-11 02:10:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:10:06,111 INFO L93 Difference]: Finished difference Result 2091 states and 3033 transitions. [2024-10-11 02:10:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-11 02:10:06,112 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 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 91 [2024-10-11 02:10:06,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:10:06,128 INFO L225 Difference]: With dead ends: 2091 [2024-10-11 02:10:06,128 INFO L226 Difference]: Without dead ends: 2087 [2024-10-11 02:10:06,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-10-11 02:10:06,133 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 220 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 02:10:06,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 499 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 02:10:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2024-10-11 02:10:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1916. [2024-10-11 02:10:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1226 states have (on average 1.3384991843393148) internal successors, (1641), 1234 states have internal predecessors, (1641), 596 states have call successors, (596), 94 states have call predecessors, (596), 93 states have return successors, (594), 587 states have call predecessors, (594), 594 states have call successors, (594) [2024-10-11 02:10:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2831 transitions. [2024-10-11 02:10:06,854 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2831 transitions. Word has length 91 [2024-10-11 02:10:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:10:06,854 INFO L471 AbstractCegarLoop]: Abstraction has 1916 states and 2831 transitions. [2024-10-11 02:10:06,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 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) [2024-10-11 02:10:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2831 transitions. [2024-10-11 02:10:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-10-11 02:10:06,856 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:10:06,856 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] [2024-10-11 02:10:06,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-11 02:10:07,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:07,060 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:10:07,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:10:07,060 INFO L85 PathProgramCache]: Analyzing trace with hash -395409781, now seen corresponding path program 1 times [2024-10-11 02:10:07,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:10:07,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664678871] [2024-10-11 02:10:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:07,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:10:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:07,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:10:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:07,262 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-11 02:10:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:07,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-11 02:10:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:07,265 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-11 02:10:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:07,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-11 02:10:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:07,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-11 02:10:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:07,271 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-11 02:10:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:07,273 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-11 02:10:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:07,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-11 02:10:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:07,279 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-11 02:10:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-10-11 02:10:07,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:10:07,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664678871] [2024-10-11 02:10:07,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664678871] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:10:07,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090929140] [2024-10-11 02:10:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:07,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:10:07,285 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:10:07,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 02:10:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:10:07,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 02:10:07,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:10:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-11 02:10:07,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:10:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-10-11 02:10:07,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090929140] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:10:07,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:10:07,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 13] total 15 [2024-10-11 02:10:07,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603743623] [2024-10-11 02:10:07,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:10:07,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 02:10:07,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:10:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 02:10:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2024-10-11 02:10:07,640 INFO L87 Difference]: Start difference. First operand 1916 states and 2831 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2024-10-11 02:10:08,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:10:08,418 INFO L93 Difference]: Finished difference Result 2724 states and 4176 transitions. [2024-10-11 02:10:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 02:10:08,419 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 92 [2024-10-11 02:10:08,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:10:08,431 INFO L225 Difference]: With dead ends: 2724 [2024-10-11 02:10:08,434 INFO L226 Difference]: Without dead ends: 1937 [2024-10-11 02:10:08,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 191 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2024-10-11 02:10:08,439 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 139 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:10:08,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 236 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:10:08,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2024-10-11 02:10:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1935. [2024-10-11 02:10:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1245 states have (on average 1.3253012048192772) internal successors, (1650), 1253 states have internal predecessors, (1650), 596 states have call successors, (596), 94 states have call predecessors, (596), 93 states have return successors, (594), 587 states have call predecessors, (594), 594 states have call successors, (594) [2024-10-11 02:10:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2840 transitions. [2024-10-11 02:10:09,207 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2840 transitions. Word has length 92 [2024-10-11 02:10:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:10:09,209 INFO L471 AbstractCegarLoop]: Abstraction has 1935 states and 2840 transitions. [2024-10-11 02:10:09,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2024-10-11 02:10:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2840 transitions. [2024-10-11 02:10:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-10-11 02:10:09,210 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:10:09,211 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] [2024-10-11 02:10:09,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-11 02:10:09,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-11 02:10:09,412 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:10:09,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:10:09,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1994866066, now seen corresponding path program 2 times [2024-10-11 02:10:09,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:10:09,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244912528] [2024-10-11 02:10:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:09,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:10:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:10:09,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189401089] [2024-10-11 02:10:09,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:10:09,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:09,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:10:09,440 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:10:09,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 02:10:09,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:10:09,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:10:09,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-10-11 02:10:09,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:10:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 32 proven. 56 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-10-11 02:10:10,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:10:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-10-11 02:10:15,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:10:15,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244912528] [2024-10-11 02:10:15,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:10:15,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189401089] [2024-10-11 02:10:15,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189401089] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:10:15,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:10:15,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2024-10-11 02:10:15,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564937237] [2024-10-11 02:10:15,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:10:15,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 02:10:15,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:10:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 02:10:15,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 02:10:15,301 INFO L87 Difference]: Start difference. First operand 1935 states and 2840 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 31 states have internal predecessors, (86), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2024-10-11 02:10:31,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:10:31,283 INFO L93 Difference]: Finished difference Result 2622 states and 3849 transitions. [2024-10-11 02:10:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-10-11 02:10:31,284 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 31 states have internal predecessors, (86), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 93 [2024-10-11 02:10:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:10:31,293 INFO L225 Difference]: With dead ends: 2622 [2024-10-11 02:10:31,293 INFO L226 Difference]: Without dead ends: 2620 [2024-10-11 02:10:31,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1897, Invalid=7033, Unknown=0, NotChecked=0, Total=8930 [2024-10-11 02:10:31,297 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 427 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:10:31,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 1381 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-10-11 02:10:31,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2024-10-11 02:10:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 2237. [2024-10-11 02:10:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 1507 states have (on average 1.3370935633709355) internal successors, (2015), 1521 states have internal predecessors, (2015), 624 states have call successors, (624), 106 states have call predecessors, (624), 105 states have return successors, (622), 609 states have call predecessors, (622), 622 states have call successors, (622) [2024-10-11 02:10:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 3261 transitions. [2024-10-11 02:10:32,314 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 3261 transitions. Word has length 93 [2024-10-11 02:10:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:10:32,315 INFO L471 AbstractCegarLoop]: Abstraction has 2237 states and 3261 transitions. [2024-10-11 02:10:32,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 31 states have internal predecessors, (86), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2024-10-11 02:10:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 3261 transitions. [2024-10-11 02:10:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-10-11 02:10:32,316 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:10:32,316 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] [2024-10-11 02:10:32,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-11 02:10:32,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:32,517 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:10:32,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:10:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1043517550, now seen corresponding path program 2 times [2024-10-11 02:10:32,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:10:32,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350851057] [2024-10-11 02:10:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:10:32,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:10:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:10:32,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324503340] [2024-10-11 02:10:32,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:10:32,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:10:32,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:10:32,539 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:10:32,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 02:10:32,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:10:32,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2024-10-11 02:10:32,621 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 02:10:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 02:10:32,672 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 02:10:32,673 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 02:10:32,673 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-11 02:10:32,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-11 02:10:32,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-11 02:10:32,880 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:10:32,926 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-11 02:10:32,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:10:32 BoogieIcfgContainer [2024-10-11 02:10:32,928 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-11 02:10:32,929 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-11 02:10:32,929 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-11 02:10:32,929 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-11 02:10:32,929 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:09:28" (3/4) ... [2024-10-11 02:10:32,930 INFO L133 WitnessPrinter]: Generating witness for reachability counterexample [2024-10-11 02:10:32,980 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-11 02:10:32,981 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-11 02:10:32,981 INFO L158 Benchmark]: Toolchain (without parser) took 65629.72ms. Allocated memory was 232.8MB in the beginning and 786.4MB in the end (delta: 553.6MB). Free memory was 164.3MB in the beginning and 700.1MB in the end (delta: -535.7MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. [2024-10-11 02:10:32,981 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 125.8MB. Free memory is still 90.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 02:10:32,981 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.59ms. Allocated memory is still 232.8MB. Free memory was 164.1MB in the beginning and 151.6MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-11 02:10:32,982 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.06ms. Allocated memory is still 232.8MB. Free memory was 151.6MB in the beginning and 149.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-11 02:10:32,982 INFO L158 Benchmark]: Boogie Preprocessor took 35.39ms. Allocated memory is still 232.8MB. Free memory was 149.9MB in the beginning and 148.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-11 02:10:32,982 INFO L158 Benchmark]: RCFGBuilder took 326.59ms. Allocated memory is still 232.8MB. Free memory was 147.8MB in the beginning and 134.1MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-10-11 02:10:32,983 INFO L158 Benchmark]: TraceAbstraction took 64858.06ms. Allocated memory was 232.8MB in the beginning and 786.4MB in the end (delta: 553.6MB). Free memory was 133.2MB in the beginning and 706.4MB in the end (delta: -573.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 02:10:32,983 INFO L158 Benchmark]: Witness Printer took 51.80ms. Allocated memory is still 786.4MB. Free memory was 706.4MB in the beginning and 700.1MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-10-11 02:10:32,983 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 125.8MB. Free memory is still 90.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.59ms. Allocated memory is still 232.8MB. Free memory was 164.1MB in the beginning and 151.6MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.06ms. Allocated memory is still 232.8MB. Free memory was 151.6MB in the beginning and 149.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.39ms. Allocated memory is still 232.8MB. Free memory was 149.9MB in the beginning and 148.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 326.59ms. Allocated memory is still 232.8MB. Free memory was 147.8MB in the beginning and 134.1MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 64858.06ms. Allocated memory was 232.8MB in the beginning and 786.4MB in the end (delta: 553.6MB). Free memory was 133.2MB in the beginning and 706.4MB in the end (delta: -573.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 51.80ms. Allocated memory is still 786.4MB. Free memory was 706.4MB in the beginning and 700.1MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. 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; [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, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 64.7s, OverallIterations: 27, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 38.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2677 SdHoareTripleChecker+Valid, 15.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2612 mSDsluCounter, 8656 SdHoareTripleChecker+Invalid, 14.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7504 mSDsCounter, 1229 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5660 IncrementalHoareTripleChecker+Invalid, 6889 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1229 mSolverCounterUnsat, 1152 mSDtfsCounter, 5660 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2163 GetRequests, 1662 SyntacticMatches, 25 SemanticMatches, 476 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5456 ImplicationChecksByTransitivity, 23.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2237occurred in iteration=26, InterpolantAutomatonStates: 406, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.3s AutomataMinimizationTime, 26 MinimizatonAttempts, 1409 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 16.0s InterpolantComputationTime, 2340 NumberOfCodeBlocks, 2340 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 2223 ConstructedInterpolants, 16 QuantifiedInterpolants, 13743 SizeOfPredicates, 55 NumberOfNonLiveVariables, 3021 ConjunctsInSsa, 447 ConjunctsInUnsatCore, 46 InterpolantComputations, 12 PerfectInterpolantSequences, 2257/2855 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! [2024-10-11 02:10:33,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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