./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de52.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de52.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 19:27:11,712 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:27:11,779 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:27:11,784 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:27:11,784 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:27:11,804 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:27:11,805 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:27:11,806 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:27:11,806 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:27:11,807 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:27:11,807 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:27:11,807 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:27:11,808 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:27:11,808 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:27:11,809 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:27:11,809 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:27:11,810 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:27:11,810 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:27:11,810 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:27:11,811 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:27:11,811 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:27:11,812 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:27:11,813 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:27:11,813 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:27:11,813 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:27:11,814 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:27:11,814 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:27:11,814 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:27:11,815 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:27:11,815 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:27:11,815 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:27:11,815 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:27:11,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:27:11,820 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:27:11,820 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:27:11,821 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:27:11,821 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:27:11,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:27:11,821 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:27:11,821 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:27:11,822 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:27:11,823 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:27:11,823 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/certificate-witnesses-artifact/automizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:27:12,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:27:12,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:27:12,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:27:12,097 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:27:12,098 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:27:12,099 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de52.c [2024-09-11 19:27:13,492 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:27:13,656 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:27:13,657 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de52.c [2024-09-11 19:27:13,662 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/caad9a5b3/c96167db6fe54282aeb03ec4a8520f34/FLAG702ea1196 [2024-09-11 19:27:13,676 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/caad9a5b3/c96167db6fe54282aeb03ec4a8520f34 [2024-09-11 19:27:13,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:27:13,681 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:27:13,683 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:27:13,683 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:27:13,688 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:27:13,690 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,691 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ff40516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13, skipping insertion in model container [2024-09-11 19:27:13,691 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,707 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:27:13,839 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2024-09-11 19:27:13,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:27:13,867 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:27:13,879 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2024-09-11 19:27:13,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:27:13,908 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:27:13,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13 WrapperNode [2024-09-11 19:27:13,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:27:13,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:27:13,911 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:27:13,911 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:27:13,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,943 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2024-09-11 19:27:13,944 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:27:13,944 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:27:13,944 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:27:13,945 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:27:13,954 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,959 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,968 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]. [2024-09-11 19:27:13,969 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,969 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,978 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,979 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,980 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,981 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:27:13,982 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:27:13,982 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:27:13,983 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:27:13,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (1/1) ... [2024-09-11 19:27:13,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:27:14,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:14,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-11 19:27:14,018 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-11 19:27:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:27:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:27:14,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:27:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:27:14,148 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:27:14,150 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:27:14,323 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-11 19:27:14,324 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:27:14,351 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:27:14,353 INFO L318 CfgBuilder]: Removed 5 assume(true) statements. [2024-09-11 19:27:14,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:27:14 BoogieIcfgContainer [2024-09-11 19:27:14,353 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:27:14,356 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:27:14,356 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:27:14,360 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:27:14,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:27:13" (1/3) ... [2024-09-11 19:27:14,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca5efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:27:14, skipping insertion in model container [2024-09-11 19:27:14,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:13" (2/3) ... [2024-09-11 19:27:14,362 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca5efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:27:14, skipping insertion in model container [2024-09-11 19:27:14,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:27:14" (3/3) ... [2024-09-11 19:27:14,364 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2024-09-11 19:27:14,381 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:27:14,381 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:27:14,441 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:27:14,450 INFO L336 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=All, 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;@1a4ef604, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:27:14,451 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:27:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-11 19:27:14,461 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:14,462 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:14,463 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:14,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:14,469 INFO L85 PathProgramCache]: Analyzing trace with hash 577542875, now seen corresponding path program 1 times [2024-09-11 19:27:14,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:14,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410066085] [2024-09-11 19:27:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:14,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:14,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:14,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410066085] [2024-09-11 19:27:14,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410066085] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:27:14,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:27:14,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:27:14,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730331565] [2024-09-11 19:27:14,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:27:14,617 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:27:14,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:27:14,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:27:14,636 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:14,653 INFO L93 Difference]: Finished difference Result 24 states and 42 transitions. [2024-09-11 19:27:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:27:14,655 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-09-11 19:27:14,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:14,663 INFO L225 Difference]: With dead ends: 24 [2024-09-11 19:27:14,663 INFO L226 Difference]: Without dead ends: 11 [2024-09-11 19:27:14,665 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:27:14,668 INFO L434 NwaCegarLoop]: 15 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, 15 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 [2024-09-11 19:27:14,669 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-09-11 19:27:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-09-11 19:27:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2024-09-11 19:27:14,695 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 10 [2024-09-11 19:27:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:14,696 INFO L474 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2024-09-11 19:27:14,696 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:14,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2024-09-11 19:27:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-11 19:27:14,698 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:14,698 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:14,698 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:27:14,698 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:14,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:14,699 INFO L85 PathProgramCache]: Analyzing trace with hash 573848791, now seen corresponding path program 1 times [2024-09-11 19:27:14,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:14,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152083298] [2024-09-11 19:27:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:15,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:15,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152083298] [2024-09-11 19:27:15,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152083298] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:27:15,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:27:15,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-11 19:27:15,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174539523] [2024-09-11 19:27:15,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:27:15,019 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:27:15,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:15,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:27:15,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:27:15,021 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:15,085 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2024-09-11 19:27:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:27:15,087 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-09-11 19:27:15,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:15,088 INFO L225 Difference]: With dead ends: 26 [2024-09-11 19:27:15,088 INFO L226 Difference]: Without dead ends: 17 [2024-09-11 19:27:15,088 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:27:15,089 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:15,090 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-11 19:27:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-11 19:27:15,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2024-09-11 19:27:15,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 10 [2024-09-11 19:27:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:15,102 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2024-09-11 19:27:15,102 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:15,103 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2024-09-11 19:27:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-11 19:27:15,103 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:15,103 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:15,104 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 19:27:15,104 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:15,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:15,104 INFO L85 PathProgramCache]: Analyzing trace with hash 611108754, now seen corresponding path program 1 times [2024-09-11 19:27:15,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:15,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172072733] [2024-09-11 19:27:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:15,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:15,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:15,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172072733] [2024-09-11 19:27:15,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172072733] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:27:15,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:27:15,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 19:27:15,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403321641] [2024-09-11 19:27:15,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:27:15,149 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-11 19:27:15,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:15,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-11 19:27:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 19:27:15,150 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:15,176 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2024-09-11 19:27:15,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-11 19:27:15,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-09-11 19:27:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:15,177 INFO L225 Difference]: With dead ends: 27 [2024-09-11 19:27:15,178 INFO L226 Difference]: Without dead ends: 21 [2024-09-11 19:27:15,178 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 19:27:15,179 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:15,181 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-11 19:27:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-11 19:27:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2024-09-11 19:27:15,192 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 11 [2024-09-11 19:27:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:15,193 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 30 transitions. [2024-09-11 19:27:15,194 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 30 transitions. [2024-09-11 19:27:15,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-11 19:27:15,195 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:15,195 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:15,195 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-11 19:27:15,195 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:15,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:15,196 INFO L85 PathProgramCache]: Analyzing trace with hash 656361283, now seen corresponding path program 1 times [2024-09-11 19:27:15,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:15,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267222321] [2024-09-11 19:27:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:15,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:15,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:15,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267222321] [2024-09-11 19:27:15,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267222321] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:27:15,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:27:15,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 19:27:15,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275872560] [2024-09-11 19:27:15,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:27:15,252 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-11 19:27:15,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:15,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-11 19:27:15,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 19:27:15,253 INFO L87 Difference]: Start difference. First operand 21 states and 30 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:15,293 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2024-09-11 19:27:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-11 19:27:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-09-11 19:27:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:15,297 INFO L225 Difference]: With dead ends: 36 [2024-09-11 19:27:15,297 INFO L226 Difference]: Without dead ends: 26 [2024-09-11 19:27:15,297 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 19:27:15,298 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:15,299 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-11 19:27:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-11 19:27:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2024-09-11 19:27:15,318 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2024-09-11 19:27:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:15,319 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2024-09-11 19:27:15,319 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:15,319 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2024-09-11 19:27:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-11 19:27:15,321 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:15,321 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:15,321 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-11 19:27:15,322 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:15,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:15,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1044350857, now seen corresponding path program 1 times [2024-09-11 19:27:15,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:15,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361921493] [2024-09-11 19:27:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:15,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 19:27:15,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:15,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361921493] [2024-09-11 19:27:15,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361921493] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:27:15,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:27:15,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 19:27:15,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983156598] [2024-09-11 19:27:15,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:27:15,443 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:27:15,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:27:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:27:15,444 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:15,518 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2024-09-11 19:27:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:27:15,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-09-11 19:27:15,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:15,519 INFO L225 Difference]: With dead ends: 33 [2024-09-11 19:27:15,520 INFO L226 Difference]: Without dead ends: 22 [2024-09-11 19:27:15,521 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:27:15,522 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:15,526 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:15,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-11 19:27:15,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-11 19:27:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2024-09-11 19:27:15,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 12 [2024-09-11 19:27:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:15,537 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2024-09-11 19:27:15,537 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2024-09-11 19:27:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-11 19:27:15,540 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:15,540 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:15,540 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-11 19:27:15,540 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:15,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:15,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1846839420, now seen corresponding path program 1 times [2024-09-11 19:27:15,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:15,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904682318] [2024-09-11 19:27:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:15,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:15,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:15,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904682318] [2024-09-11 19:27:15,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904682318] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:15,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813908243] [2024-09-11 19:27:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:15,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:15,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:15,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:15,682 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:27:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:15,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-11 19:27:15,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:15,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:15,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813908243] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:15,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:27:15,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-09-11 19:27:15,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963245452] [2024-09-11 19:27:15,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:27:15,841 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:27:15,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:15,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:27:15,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:27:15,845 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:15,885 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2024-09-11 19:27:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:27:15,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-09-11 19:27:15,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:15,887 INFO L225 Difference]: With dead ends: 28 [2024-09-11 19:27:15,887 INFO L226 Difference]: Without dead ends: 19 [2024-09-11 19:27:15,887 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:27:15,889 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:15,890 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-09-11 19:27:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-09-11 19:27:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2024-09-11 19:27:15,901 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 13 [2024-09-11 19:27:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:15,901 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2024-09-11 19:27:15,901 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:15,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2024-09-11 19:27:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-11 19:27:15,902 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:15,902 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:15,924 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:16,103 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-11 19:27:16,103 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:16,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:16,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1991740900, now seen corresponding path program 1 times [2024-09-11 19:27:16,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:16,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772904811] [2024-09-11 19:27:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:16,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:16,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:16,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772904811] [2024-09-11 19:27:16,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772904811] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:16,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982964578] [2024-09-11 19:27:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:16,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:16,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:16,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:16,180 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:27:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:16,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-11 19:27:16,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 19:27:16,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:16,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982964578] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:16,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:27:16,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2024-09-11 19:27:16,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821308795] [2024-09-11 19:27:16,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:27:16,290 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:27:16,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:16,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:27:16,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:27:16,291 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:16,310 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-09-11 19:27:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:27:16,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-09-11 19:27:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:16,311 INFO L225 Difference]: With dead ends: 23 [2024-09-11 19:27:16,311 INFO L226 Difference]: Without dead ends: 16 [2024-09-11 19:27:16,312 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:27:16,313 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:16,313 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-11 19:27:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-11 19:27:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2024-09-11 19:27:16,318 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 13 [2024-09-11 19:27:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:16,318 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2024-09-11 19:27:16,319 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:16,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2024-09-11 19:27:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-11 19:27:16,320 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:16,320 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:16,336 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 19:27:16,523 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-11 19:27:16,524 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:16,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:16,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2140868714, now seen corresponding path program 1 times [2024-09-11 19:27:16,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:16,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943631607] [2024-09-11 19:27:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:16,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:16,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943631607] [2024-09-11 19:27:16,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943631607] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252361043] [2024-09-11 19:27:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:16,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:16,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:16,623 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:16,625 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:27:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:16,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-11 19:27:16,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:16,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:16,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252361043] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:16,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:16,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-09-11 19:27:16,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590418986] [2024-09-11 19:27:16,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:16,760 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:27:16,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:16,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:27:16,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:27:16,760 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:16,799 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2024-09-11 19:27:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:27:16,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-09-11 19:27:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:16,801 INFO L225 Difference]: With dead ends: 26 [2024-09-11 19:27:16,801 INFO L226 Difference]: Without dead ends: 20 [2024-09-11 19:27:16,801 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:27:16,801 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:16,802 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-11 19:27:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-09-11 19:27:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2024-09-11 19:27:16,812 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 14 [2024-09-11 19:27:16,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:16,812 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2024-09-11 19:27:16,822 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:16,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:16,823 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2024-09-11 19:27:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-11 19:27:16,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:16,824 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:16,841 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 19:27:17,028 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-11 19:27:17,029 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:17,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2095616185, now seen corresponding path program 1 times [2024-09-11 19:27:17,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:17,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229846020] [2024-09-11 19:27:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:17,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 19:27:17,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:17,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229846020] [2024-09-11 19:27:17,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229846020] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:17,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292374075] [2024-09-11 19:27:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:17,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:17,141 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:17,143 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:27:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:17,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:27:17,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 19:27:17,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 19:27:17,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292374075] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:17,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:17,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-09-11 19:27:17,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040227659] [2024-09-11 19:27:17,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:17,289 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:27:17,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:17,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:27:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:27:17,292 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:17,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:17,659 INFO L93 Difference]: Finished difference Result 81 states and 124 transitions. [2024-09-11 19:27:17,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-11 19:27:17,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-09-11 19:27:17,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:17,661 INFO L225 Difference]: With dead ends: 81 [2024-09-11 19:27:17,661 INFO L226 Difference]: Without dead ends: 68 [2024-09-11 19:27:17,662 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2024-09-11 19:27:17,663 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:17,663 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 43 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:27:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-11 19:27:17,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 34. [2024-09-11 19:27:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2024-09-11 19:27:17,678 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 14 [2024-09-11 19:27:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:17,678 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2024-09-11 19:27:17,678 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:17,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2024-09-11 19:27:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-11 19:27:17,679 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:17,679 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:17,695 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 19:27:17,883 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:17,884 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:17,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:17,884 INFO L85 PathProgramCache]: Analyzing trace with hash -537926878, now seen corresponding path program 1 times [2024-09-11 19:27:17,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:17,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142923092] [2024-09-11 19:27:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:17,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 19:27:18,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:18,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142923092] [2024-09-11 19:27:18,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142923092] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:18,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770818308] [2024-09-11 19:27:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:18,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:18,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:18,009 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:18,010 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:27:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:18,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-11 19:27:18,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:18,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 19:27:18,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770818308] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:18,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:18,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 7] total 12 [2024-09-11 19:27:18,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750283804] [2024-09-11 19:27:18,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:18,208 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-11 19:27:18,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-11 19:27:18,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-09-11 19:27:18,209 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:18,344 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2024-09-11 19:27:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 19:27:18,344 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-09-11 19:27:18,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:18,345 INFO L225 Difference]: With dead ends: 54 [2024-09-11 19:27:18,345 INFO L226 Difference]: Without dead ends: 41 [2024-09-11 19:27:18,346 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:27:18,346 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:18,347 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 56 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-11 19:27:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-09-11 19:27:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 37 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2024-09-11 19:27:18,365 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 15 [2024-09-11 19:27:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:18,365 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2024-09-11 19:27:18,366 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:18,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2024-09-11 19:27:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-11 19:27:18,367 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:18,367 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:18,388 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 19:27:18,567 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-11 19:27:18,568 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:18,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1908629782, now seen corresponding path program 2 times [2024-09-11 19:27:18,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:18,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585458157] [2024-09-11 19:27:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:18,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:27:18,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:18,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585458157] [2024-09-11 19:27:18,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585458157] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:18,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344100738] [2024-09-11 19:27:18,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:27:18,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:18,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:18,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:18,675 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:27:18,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:27:18,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:18,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-11 19:27:18,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:27:18,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:27:18,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344100738] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:18,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:18,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-09-11 19:27:18,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460595346] [2024-09-11 19:27:18,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:18,779 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:27:18,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:18,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:27:18,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:27:18,780 INFO L87 Difference]: Start difference. First operand 38 states and 52 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:18,813 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2024-09-11 19:27:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:27:18,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-09-11 19:27:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:18,816 INFO L225 Difference]: With dead ends: 46 [2024-09-11 19:27:18,816 INFO L226 Difference]: Without dead ends: 29 [2024-09-11 19:27:18,817 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:27:18,817 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:18,818 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-11 19:27:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-11 19:27:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2024-09-11 19:27:18,832 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 16 [2024-09-11 19:27:18,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:18,832 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2024-09-11 19:27:18,832 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:18,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2024-09-11 19:27:18,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-11 19:27:18,834 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:18,834 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:18,850 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-11 19:27:19,035 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-11 19:27:19,035 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:19,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2122371383, now seen corresponding path program 2 times [2024-09-11 19:27:19,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:19,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770135360] [2024-09-11 19:27:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:19,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:27:19,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:19,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770135360] [2024-09-11 19:27:19,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770135360] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229118243] [2024-09-11 19:27:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:27:19,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:19,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:19,108 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:19,109 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 19:27:19,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:27:19,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:19,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-11 19:27:19,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:19,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:19,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229118243] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:19,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:19,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-11 19:27:19,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956334783] [2024-09-11 19:27:19,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:19,264 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:27:19,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:19,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:27:19,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:27:19,265 INFO L87 Difference]: Start difference. First operand 29 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:19,576 INFO L93 Difference]: Finished difference Result 90 states and 137 transitions. [2024-09-11 19:27:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 19:27:19,577 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-09-11 19:27:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:19,578 INFO L225 Difference]: With dead ends: 90 [2024-09-11 19:27:19,578 INFO L226 Difference]: Without dead ends: 71 [2024-09-11 19:27:19,578 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:27:19,579 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:19,579 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 46 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:19,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-11 19:27:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2024-09-11 19:27:19,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2024-09-11 19:27:19,601 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 16 [2024-09-11 19:27:19,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:19,601 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2024-09-11 19:27:19,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:19,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2024-09-11 19:27:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-11 19:27:19,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:19,603 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:19,619 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 19:27:19,806 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:19,807 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:19,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:19,807 INFO L85 PathProgramCache]: Analyzing trace with hash -938210109, now seen corresponding path program 2 times [2024-09-11 19:27:19,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:19,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341271067] [2024-09-11 19:27:19,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:19,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 19:27:19,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:19,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341271067] [2024-09-11 19:27:19,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341271067] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:19,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909667668] [2024-09-11 19:27:19,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:27:19,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:19,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:19,940 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:19,942 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 19:27:19,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:27:19,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:19,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-11 19:27:19,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:27:20,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:27:20,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909667668] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:20,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:20,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2024-09-11 19:27:20,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419246346] [2024-09-11 19:27:20,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:20,125 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-11 19:27:20,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:20,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-11 19:27:20,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-09-11 19:27:20,127 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:20,492 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2024-09-11 19:27:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 19:27:20,493 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-09-11 19:27:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:20,493 INFO L225 Difference]: With dead ends: 71 [2024-09-11 19:27:20,494 INFO L226 Difference]: Without dead ends: 56 [2024-09-11 19:27:20,495 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2024-09-11 19:27:20,495 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:20,496 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 55 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-11 19:27:20,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-09-11 19:27:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2024-09-11 19:27:20,524 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 17 [2024-09-11 19:27:20,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:20,524 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2024-09-11 19:27:20,524 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:20,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:20,525 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2024-09-11 19:27:20,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-11 19:27:20,525 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:20,525 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:20,541 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 19:27:20,726 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:20,726 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:20,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:20,727 INFO L85 PathProgramCache]: Analyzing trace with hash 179882055, now seen corresponding path program 3 times [2024-09-11 19:27:20,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:20,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331222508] [2024-09-11 19:27:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:20,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 19:27:20,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:20,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331222508] [2024-09-11 19:27:20,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331222508] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:20,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445393334] [2024-09-11 19:27:20,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:27:20,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:20,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:20,836 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:20,837 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 19:27:20,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-11 19:27:20,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:20,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-11 19:27:20,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 19:27:20,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 19:27:20,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445393334] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:20,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:20,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2024-09-11 19:27:20,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969897360] [2024-09-11 19:27:20,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:21,000 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 19:27:21,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:21,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 19:27:21,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-09-11 19:27:21,001 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:21,593 INFO L93 Difference]: Finished difference Result 150 states and 222 transitions. [2024-09-11 19:27:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-11 19:27:21,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-09-11 19:27:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:21,594 INFO L225 Difference]: With dead ends: 150 [2024-09-11 19:27:21,594 INFO L226 Difference]: Without dead ends: 118 [2024-09-11 19:27:21,595 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 19:27:21,595 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:21,595 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 107 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:27:21,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-11 19:27:21,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 78. [2024-09-11 19:27:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.4155844155844155) internal successors, (109), 77 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2024-09-11 19:27:21,628 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 18 [2024-09-11 19:27:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:21,628 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2024-09-11 19:27:21,628 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:21,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2024-09-11 19:27:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-11 19:27:21,631 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:21,632 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:21,649 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:21,832 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 19:27:21,832 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:21,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:21,833 INFO L85 PathProgramCache]: Analyzing trace with hash -867982685, now seen corresponding path program 3 times [2024-09-11 19:27:21,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:21,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253362179] [2024-09-11 19:27:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:21,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:21,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:21,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253362179] [2024-09-11 19:27:21,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253362179] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:21,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903938458] [2024-09-11 19:27:21,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:27:21,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:21,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:21,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:21,991 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 19:27:22,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:27:22,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:22,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 19:27:22,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:27:22,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:27:22,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903938458] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:22,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:22,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2024-09-11 19:27:22,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735697618] [2024-09-11 19:27:22,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:22,230 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:27:22,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:22,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:27:22,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:27:22,233 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:23,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:23,062 INFO L93 Difference]: Finished difference Result 212 states and 321 transitions. [2024-09-11 19:27:23,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-11 19:27:23,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-09-11 19:27:23,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:23,064 INFO L225 Difference]: With dead ends: 212 [2024-09-11 19:27:23,064 INFO L226 Difference]: Without dead ends: 165 [2024-09-11 19:27:23,065 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2024-09-11 19:27:23,065 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:23,065 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 102 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:27:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-11 19:27:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 104. [2024-09-11 19:27:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.3980582524271845) internal successors, (144), 103 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:23,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2024-09-11 19:27:23,108 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 19 [2024-09-11 19:27:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:23,108 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2024-09-11 19:27:23,108 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:23,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2024-09-11 19:27:23,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-11 19:27:23,109 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:23,110 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:23,127 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-11 19:27:23,310 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 19:27:23,310 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:23,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:23,311 INFO L85 PathProgramCache]: Analyzing trace with hash -673395657, now seen corresponding path program 4 times [2024-09-11 19:27:23,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:23,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88699882] [2024-09-11 19:27:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:23,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:27:23,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:23,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88699882] [2024-09-11 19:27:23,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88699882] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:23,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705942903] [2024-09-11 19:27:23,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:27:23,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:23,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:23,478 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:23,480 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 19:27:23,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:27:23,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:23,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-11 19:27:23,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:27:23,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:27:23,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705942903] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:23,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:23,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-09-11 19:27:23,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309655955] [2024-09-11 19:27:23,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:23,634 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:27:23,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:23,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:27:23,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:27:23,635 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:23,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:23,755 INFO L93 Difference]: Finished difference Result 140 states and 195 transitions. [2024-09-11 19:27:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 19:27:23,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-09-11 19:27:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:23,757 INFO L225 Difference]: With dead ends: 140 [2024-09-11 19:27:23,757 INFO L226 Difference]: Without dead ends: 132 [2024-09-11 19:27:23,757 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:27:23,758 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:23,758 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 65 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:23,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-11 19:27:23,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 110. [2024-09-11 19:27:23,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.4128440366972477) internal successors, (154), 109 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 154 transitions. [2024-09-11 19:27:23,798 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 154 transitions. Word has length 20 [2024-09-11 19:27:23,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:23,798 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 154 transitions. [2024-09-11 19:27:23,798 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:23,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:23,799 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 154 transitions. [2024-09-11 19:27:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-11 19:27:23,799 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:23,800 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:23,811 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:24,000 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-11 19:27:24,000 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:24,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1184261561, now seen corresponding path program 3 times [2024-09-11 19:27:24,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:24,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179531077] [2024-09-11 19:27:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:24,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 19:27:24,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:24,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179531077] [2024-09-11 19:27:24,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179531077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:24,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798209164] [2024-09-11 19:27:24,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:27:24,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:24,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:24,148 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:24,149 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 19:27:24,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:27:24,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:24,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 19:27:24,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-11 19:27:24,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-11 19:27:24,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798209164] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:24,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:24,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2024-09-11 19:27:24,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215343864] [2024-09-11 19:27:24,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:24,392 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:27:24,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:24,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:27:24,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:27:24,393 INFO L87 Difference]: Start difference. First operand 110 states and 154 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:25,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:25,225 INFO L93 Difference]: Finished difference Result 154 states and 217 transitions. [2024-09-11 19:27:25,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-11 19:27:25,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-09-11 19:27:25,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:25,227 INFO L225 Difference]: With dead ends: 154 [2024-09-11 19:27:25,227 INFO L226 Difference]: Without dead ends: 137 [2024-09-11 19:27:25,228 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2024-09-11 19:27:25,228 INFO L434 NwaCegarLoop]: 2 mSDtfsCounter, 50 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:25,229 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 32 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:27:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-09-11 19:27:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 100. [2024-09-11 19:27:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.393939393939394) internal successors, (138), 99 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2024-09-11 19:27:25,263 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 20 [2024-09-11 19:27:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:25,263 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2024-09-11 19:27:25,263 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:25,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2024-09-11 19:27:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-11 19:27:25,264 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:25,264 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:25,276 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-11 19:27:25,464 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-11 19:27:25,464 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:25,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:25,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1139243939, now seen corresponding path program 5 times [2024-09-11 19:27:25,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:25,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075077979] [2024-09-11 19:27:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:25,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-11 19:27:25,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:25,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075077979] [2024-09-11 19:27:25,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075077979] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:25,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125400075] [2024-09-11 19:27:25,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:27:25,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:25,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:25,612 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:25,613 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-11 19:27:25,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-11 19:27:25,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:25,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-11 19:27:25,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-11 19:27:25,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-11 19:27:25,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125400075] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:25,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:25,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-11 19:27:25,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886894727] [2024-09-11 19:27:25,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:25,730 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:27:25,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:25,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:27:25,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:27:25,730 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:25,796 INFO L93 Difference]: Finished difference Result 139 states and 195 transitions. [2024-09-11 19:27:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:27:25,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-09-11 19:27:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:25,799 INFO L225 Difference]: With dead ends: 139 [2024-09-11 19:27:25,799 INFO L226 Difference]: Without dead ends: 110 [2024-09-11 19:27:25,801 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:27:25,801 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:25,801 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:25,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-11 19:27:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2024-09-11 19:27:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.3904761904761904) internal successors, (146), 105 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 146 transitions. [2024-09-11 19:27:25,845 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 146 transitions. Word has length 21 [2024-09-11 19:27:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:25,845 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 146 transitions. [2024-09-11 19:27:25,845 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:25,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 146 transitions. [2024-09-11 19:27:25,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-11 19:27:25,846 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:25,846 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:25,863 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:26,050 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-11 19:27:26,051 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:26,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash -134959996, now seen corresponding path program 6 times [2024-09-11 19:27:26,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:26,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623450020] [2024-09-11 19:27:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:26,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 19:27:26,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:26,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623450020] [2024-09-11 19:27:26,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623450020] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:26,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205400283] [2024-09-11 19:27:26,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:27:26,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:26,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:26,176 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:26,177 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-11 19:27:26,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-11 19:27:26,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:26,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-11 19:27:26,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 19:27:26,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 19:27:26,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205400283] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:26,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:26,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 17 [2024-09-11 19:27:26,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405044808] [2024-09-11 19:27:26,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:26,360 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 19:27:26,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:26,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 19:27:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-09-11 19:27:26,361 INFO L87 Difference]: Start difference. First operand 106 states and 146 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:26,818 INFO L93 Difference]: Finished difference Result 269 states and 391 transitions. [2024-09-11 19:27:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 19:27:26,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-09-11 19:27:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:26,819 INFO L225 Difference]: With dead ends: 269 [2024-09-11 19:27:26,820 INFO L226 Difference]: Without dead ends: 211 [2024-09-11 19:27:26,820 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2024-09-11 19:27:26,821 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:26,821 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 162 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:27:26,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-11 19:27:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 118. [2024-09-11 19:27:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.3333333333333333) internal successors, (156), 117 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 156 transitions. [2024-09-11 19:27:26,856 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 156 transitions. Word has length 21 [2024-09-11 19:27:26,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:26,856 INFO L474 AbstractCegarLoop]: Abstraction has 118 states and 156 transitions. [2024-09-11 19:27:26,857 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:26,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 156 transitions. [2024-09-11 19:27:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-11 19:27:26,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:26,858 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:26,874 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-11 19:27:27,061 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:27,062 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:27,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:27,062 INFO L85 PathProgramCache]: Analyzing trace with hash 732123794, now seen corresponding path program 4 times [2024-09-11 19:27:27,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:27,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168435862] [2024-09-11 19:27:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:27,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:27,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:27,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168435862] [2024-09-11 19:27:27,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168435862] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:27,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660440910] [2024-09-11 19:27:27,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:27:27,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:27,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:27,272 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:27,274 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-11 19:27:27,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:27:27,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:27,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-11 19:27:27,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-11 19:27:27,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-11 19:27:27,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660440910] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:27,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:27,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2024-09-11 19:27:27,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242709440] [2024-09-11 19:27:27,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:27,566 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 19:27:27,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:27,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 19:27:27,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2024-09-11 19:27:27,567 INFO L87 Difference]: Start difference. First operand 118 states and 156 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:28,810 INFO L93 Difference]: Finished difference Result 207 states and 294 transitions. [2024-09-11 19:27:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-09-11 19:27:28,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-09-11 19:27:28,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:28,811 INFO L225 Difference]: With dead ends: 207 [2024-09-11 19:27:28,811 INFO L226 Difference]: Without dead ends: 186 [2024-09-11 19:27:28,813 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=434, Invalid=4536, Unknown=0, NotChecked=0, Total=4970 [2024-09-11 19:27:28,813 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 70 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:28,813 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 81 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 19:27:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-09-11 19:27:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 138. [2024-09-11 19:27:28,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.3284671532846715) internal successors, (182), 137 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:28,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 182 transitions. [2024-09-11 19:27:28,857 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 182 transitions. Word has length 23 [2024-09-11 19:27:28,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:28,857 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 182 transitions. [2024-09-11 19:27:28,858 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:28,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:28,858 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 182 transitions. [2024-09-11 19:27:28,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-11 19:27:28,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:28,859 INFO L216 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:28,871 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:29,059 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:29,060 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:29,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:29,060 INFO L85 PathProgramCache]: Analyzing trace with hash -193066318, now seen corresponding path program 4 times [2024-09-11 19:27:29,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:29,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307107379] [2024-09-11 19:27:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:29,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-11 19:27:29,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:29,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307107379] [2024-09-11 19:27:29,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307107379] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:29,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108010796] [2024-09-11 19:27:29,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:27:29,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:29,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:29,207 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:29,209 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-11 19:27:29,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:27:29,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:29,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-11 19:27:29,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-11 19:27:29,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:27:29,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108010796] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:29,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:29,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2024-09-11 19:27:29,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378525817] [2024-09-11 19:27:29,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:29,414 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:27:29,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:29,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:27:29,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:27:29,415 INFO L87 Difference]: Start difference. First operand 138 states and 182 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:30,238 INFO L93 Difference]: Finished difference Result 291 states and 409 transitions. [2024-09-11 19:27:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-11 19:27:30,239 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-09-11 19:27:30,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:30,240 INFO L225 Difference]: With dead ends: 291 [2024-09-11 19:27:30,242 INFO L226 Difference]: Without dead ends: 211 [2024-09-11 19:27:30,243 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2024-09-11 19:27:30,243 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 51 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:30,243 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 324 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 19:27:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-11 19:27:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 128. [2024-09-11 19:27:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.330708661417323) internal successors, (169), 127 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 169 transitions. [2024-09-11 19:27:30,282 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 169 transitions. Word has length 23 [2024-09-11 19:27:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:30,282 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 169 transitions. [2024-09-11 19:27:30,282 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:30,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 169 transitions. [2024-09-11 19:27:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-11 19:27:30,283 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:30,283 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:30,300 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-11 19:27:30,483 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:30,484 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:30,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:30,484 INFO L85 PathProgramCache]: Analyzing trace with hash 752963510, now seen corresponding path program 7 times [2024-09-11 19:27:30,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:30,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016036235] [2024-09-11 19:27:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:30,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:27:30,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:30,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016036235] [2024-09-11 19:27:30,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016036235] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:30,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542237526] [2024-09-11 19:27:30,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:27:30,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:30,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:30,617 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:30,620 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-11 19:27:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:30,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 19:27:30,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:27:30,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:27:30,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542237526] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:30,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:30,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-11 19:27:30,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944631562] [2024-09-11 19:27:30,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:30,760 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:27:30,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:27:30,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:27:30,761 INFO L87 Difference]: Start difference. First operand 128 states and 169 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:30,909 INFO L93 Difference]: Finished difference Result 149 states and 198 transitions. [2024-09-11 19:27:30,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 19:27:30,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-09-11 19:27:30,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:30,912 INFO L225 Difference]: With dead ends: 149 [2024-09-11 19:27:30,912 INFO L226 Difference]: Without dead ends: 134 [2024-09-11 19:27:30,912 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:27:30,913 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:30,914 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-11 19:27:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2024-09-11 19:27:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.3181818181818181) internal successors, (174), 132 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 174 transitions. [2024-09-11 19:27:30,973 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 174 transitions. Word has length 24 [2024-09-11 19:27:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:30,973 INFO L474 AbstractCegarLoop]: Abstraction has 133 states and 174 transitions. [2024-09-11 19:27:30,973 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:30,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:30,973 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 174 transitions. [2024-09-11 19:27:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-11 19:27:30,974 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:30,974 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:30,991 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:31,178 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:31,179 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:31,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:31,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1367058242, now seen corresponding path program 8 times [2024-09-11 19:27:31,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:31,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081659095] [2024-09-11 19:27:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:31,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:27:31,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:31,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081659095] [2024-09-11 19:27:31,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081659095] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:31,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386496086] [2024-09-11 19:27:31,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:27:31,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:31,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:31,330 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:31,332 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-11 19:27:31,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:27:31,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:31,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-11 19:27:31,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:27:31,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:27:31,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386496086] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:31,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:31,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2024-09-11 19:27:31,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639899879] [2024-09-11 19:27:31,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:31,506 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 19:27:31,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:31,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 19:27:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:27:31,507 INFO L87 Difference]: Start difference. First operand 133 states and 174 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:31,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:31,656 INFO L93 Difference]: Finished difference Result 185 states and 247 transitions. [2024-09-11 19:27:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 19:27:31,656 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-09-11 19:27:31,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:31,658 INFO L225 Difference]: With dead ends: 185 [2024-09-11 19:27:31,658 INFO L226 Difference]: Without dead ends: 176 [2024-09-11 19:27:31,658 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:27:31,658 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:31,659 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 111 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:31,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-09-11 19:27:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 146. [2024-09-11 19:27:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3586206896551725) internal successors, (197), 145 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 197 transitions. [2024-09-11 19:27:31,723 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 197 transitions. Word has length 25 [2024-09-11 19:27:31,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:31,723 INFO L474 AbstractCegarLoop]: Abstraction has 146 states and 197 transitions. [2024-09-11 19:27:31,723 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:31,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 197 transitions. [2024-09-11 19:27:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-11 19:27:31,724 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:31,725 INFO L216 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:31,741 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-11 19:27:31,925 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-11 19:27:31,925 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:31,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:31,926 INFO L85 PathProgramCache]: Analyzing trace with hash -523609355, now seen corresponding path program 5 times [2024-09-11 19:27:31,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:31,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792688586] [2024-09-11 19:27:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:31,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-11 19:27:32,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:32,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792688586] [2024-09-11 19:27:32,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792688586] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:32,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843797447] [2024-09-11 19:27:32,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:27:32,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:32,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:32,100 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:32,101 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-11 19:27:32,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-11 19:27:32,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:32,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-11 19:27:32,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 19:27:32,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-11 19:27:32,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843797447] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:32,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:32,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 6] total 20 [2024-09-11 19:27:32,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540535721] [2024-09-11 19:27:32,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:32,270 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 19:27:32,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 19:27:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:27:32,271 INFO L87 Difference]: Start difference. First operand 146 states and 197 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:33,860 INFO L93 Difference]: Finished difference Result 359 states and 511 transitions. [2024-09-11 19:27:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-09-11 19:27:33,861 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-09-11 19:27:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:33,862 INFO L225 Difference]: With dead ends: 359 [2024-09-11 19:27:33,862 INFO L226 Difference]: Without dead ends: 283 [2024-09-11 19:27:33,864 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=737, Invalid=6069, Unknown=0, NotChecked=0, Total=6806 [2024-09-11 19:27:33,865 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 76 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:33,865 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 295 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:27:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-09-11 19:27:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 156. [2024-09-11 19:27:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.3419354838709678) internal successors, (208), 155 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 208 transitions. [2024-09-11 19:27:33,921 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 208 transitions. Word has length 25 [2024-09-11 19:27:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:33,921 INFO L474 AbstractCegarLoop]: Abstraction has 156 states and 208 transitions. [2024-09-11 19:27:33,921 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:33,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 208 transitions. [2024-09-11 19:27:33,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-11 19:27:33,922 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:33,922 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:33,934 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:34,122 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-11 19:27:34,123 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:34,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:34,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1070841546, now seen corresponding path program 9 times [2024-09-11 19:27:34,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:34,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361260840] [2024-09-11 19:27:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:34,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 19:27:34,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:34,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361260840] [2024-09-11 19:27:34,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361260840] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:34,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963367488] [2024-09-11 19:27:34,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:27:34,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:34,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:34,249 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:34,250 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-11 19:27:34,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:27:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:34,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 19:27:34,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 19:27:34,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 19:27:34,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963367488] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:34,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:34,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-11 19:27:34,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164929656] [2024-09-11 19:27:34,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:34,386 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:27:34,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:34,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:27:34,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:27:34,387 INFO L87 Difference]: Start difference. First operand 156 states and 208 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:34,497 INFO L93 Difference]: Finished difference Result 178 states and 240 transitions. [2024-09-11 19:27:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:27:34,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-09-11 19:27:34,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:34,498 INFO L225 Difference]: With dead ends: 178 [2024-09-11 19:27:34,499 INFO L226 Difference]: Without dead ends: 146 [2024-09-11 19:27:34,499 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:27:34,499 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:34,500 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 59 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:34,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-09-11 19:27:34,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2024-09-11 19:27:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3517241379310345) internal successors, (196), 145 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 196 transitions. [2024-09-11 19:27:34,571 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 196 transitions. Word has length 26 [2024-09-11 19:27:34,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:34,571 INFO L474 AbstractCegarLoop]: Abstraction has 146 states and 196 transitions. [2024-09-11 19:27:34,571 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:34,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:34,572 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 196 transitions. [2024-09-11 19:27:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-11 19:27:34,572 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:34,573 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:34,593 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-11 19:27:34,776 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-11 19:27:34,776 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:34,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:34,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1584003690, now seen corresponding path program 5 times [2024-09-11 19:27:34,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:34,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412311746] [2024-09-11 19:27:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:34,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:34,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:34,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412311746] [2024-09-11 19:27:34,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412311746] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:34,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137046100] [2024-09-11 19:27:34,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:27:34,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:34,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:34,970 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:34,971 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-11 19:27:35,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-11 19:27:35,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:35,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-11 19:27:35,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:35,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:27:35,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137046100] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:35,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:35,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 13] total 33 [2024-09-11 19:27:35,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125484385] [2024-09-11 19:27:35,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:35,402 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-11 19:27:35,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:35,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-11 19:27:35,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 19:27:35,403 INFO L87 Difference]: Start difference. First operand 146 states and 196 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:36,807 INFO L93 Difference]: Finished difference Result 288 states and 407 transitions. [2024-09-11 19:27:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-09-11 19:27:36,807 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-09-11 19:27:36,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:36,809 INFO L225 Difference]: With dead ends: 288 [2024-09-11 19:27:36,809 INFO L226 Difference]: Without dead ends: 267 [2024-09-11 19:27:36,810 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1508, Invalid=4812, Unknown=0, NotChecked=0, Total=6320 [2024-09-11 19:27:36,810 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 138 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:36,811 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 255 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:27:36,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-11 19:27:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 157. [2024-09-11 19:27:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.3461538461538463) internal successors, (210), 156 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 210 transitions. [2024-09-11 19:27:36,878 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 210 transitions. Word has length 26 [2024-09-11 19:27:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:36,878 INFO L474 AbstractCegarLoop]: Abstraction has 157 states and 210 transitions. [2024-09-11 19:27:36,879 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:36,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 210 transitions. [2024-09-11 19:27:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-11 19:27:36,880 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:36,880 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:36,894 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:37,080 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-11 19:27:37,080 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:37,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2124387075, now seen corresponding path program 10 times [2024-09-11 19:27:37,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:37,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220532750] [2024-09-11 19:27:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:37,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-11 19:27:37,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:37,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220532750] [2024-09-11 19:27:37,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220532750] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:37,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764256620] [2024-09-11 19:27:37,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:27:37,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:37,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:37,265 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:37,266 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-11 19:27:37,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:27:37,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:37,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-11 19:27:37,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-11 19:27:37,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-11 19:27:37,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764256620] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:37,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:37,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2024-09-11 19:27:37,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127368534] [2024-09-11 19:27:37,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:37,400 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:27:37,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:37,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:27:37,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:27:37,401 INFO L87 Difference]: Start difference. First operand 157 states and 210 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:37,587 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2024-09-11 19:27:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 19:27:37,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-09-11 19:27:37,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:37,589 INFO L225 Difference]: With dead ends: 214 [2024-09-11 19:27:37,589 INFO L226 Difference]: Without dead ends: 192 [2024-09-11 19:27:37,590 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-09-11 19:27:37,590 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:37,590 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 118 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-09-11 19:27:37,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2024-09-11 19:27:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.343915343915344) internal successors, (254), 189 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 254 transitions. [2024-09-11 19:27:37,685 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 254 transitions. Word has length 27 [2024-09-11 19:27:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:37,685 INFO L474 AbstractCegarLoop]: Abstraction has 190 states and 254 transitions. [2024-09-11 19:27:37,685 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:37,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 254 transitions. [2024-09-11 19:27:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-11 19:27:37,686 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:37,686 INFO L216 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:37,699 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-11 19:27:37,887 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-11 19:27:37,887 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:37,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:37,887 INFO L85 PathProgramCache]: Analyzing trace with hash 443535186, now seen corresponding path program 11 times [2024-09-11 19:27:37,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:37,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616183767] [2024-09-11 19:27:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:37,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:27:38,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:38,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616183767] [2024-09-11 19:27:38,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616183767] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:38,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38633899] [2024-09-11 19:27:38,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:27:38,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:38,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:38,067 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:38,068 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-11 19:27:38,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-11 19:27:38,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:38,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-11 19:27:38,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-11 19:27:38,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-11 19:27:38,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38633899] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:38,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:38,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 10] total 27 [2024-09-11 19:27:38,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913365927] [2024-09-11 19:27:38,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:38,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 19:27:38,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:38,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 19:27:38,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2024-09-11 19:27:38,360 INFO L87 Difference]: Start difference. First operand 190 states and 254 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:39,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:39,508 INFO L93 Difference]: Finished difference Result 468 states and 648 transitions. [2024-09-11 19:27:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-11 19:27:39,509 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-09-11 19:27:39,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:39,511 INFO L225 Difference]: With dead ends: 468 [2024-09-11 19:27:39,511 INFO L226 Difference]: Without dead ends: 372 [2024-09-11 19:27:39,512 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=482, Invalid=2170, Unknown=0, NotChecked=0, Total=2652 [2024-09-11 19:27:39,512 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 140 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:39,512 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 409 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:27:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2024-09-11 19:27:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 217. [2024-09-11 19:27:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.3101851851851851) internal successors, (283), 216 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 283 transitions. [2024-09-11 19:27:39,653 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 283 transitions. Word has length 27 [2024-09-11 19:27:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:39,654 INFO L474 AbstractCegarLoop]: Abstraction has 217 states and 283 transitions. [2024-09-11 19:27:39,654 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:39,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 283 transitions. [2024-09-11 19:27:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-11 19:27:39,655 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:39,656 INFO L216 NwaCegarLoop]: trace histogram [9, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:39,671 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:39,856 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-11 19:27:39,856 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:39,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:39,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1072331946, now seen corresponding path program 6 times [2024-09-11 19:27:39,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:39,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220958908] [2024-09-11 19:27:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:39,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:27:40,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:40,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220958908] [2024-09-11 19:27:40,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220958908] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:40,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956299280] [2024-09-11 19:27:40,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:27:40,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:40,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:40,072 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:40,074 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-11 19:27:40,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-11 19:27:40,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:40,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-11 19:27:40,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 19:27:40,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 19:27:40,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956299280] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:40,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:40,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 24 [2024-09-11 19:27:40,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17121595] [2024-09-11 19:27:40,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:40,430 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-11 19:27:40,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:40,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-11 19:27:40,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2024-09-11 19:27:40,431 INFO L87 Difference]: Start difference. First operand 217 states and 283 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:42,960 INFO L93 Difference]: Finished difference Result 440 states and 605 transitions. [2024-09-11 19:27:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-11 19:27:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-09-11 19:27:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:42,962 INFO L225 Difference]: With dead ends: 440 [2024-09-11 19:27:42,962 INFO L226 Difference]: Without dead ends: 322 [2024-09-11 19:27:42,963 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=727, Invalid=7105, Unknown=0, NotChecked=0, Total=7832 [2024-09-11 19:27:42,963 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 150 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:42,964 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 373 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1981 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 19:27:42,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2024-09-11 19:27:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 208. [2024-09-11 19:27:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.2995169082125604) internal successors, (269), 207 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 269 transitions. [2024-09-11 19:27:43,081 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 269 transitions. Word has length 28 [2024-09-11 19:27:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:43,081 INFO L474 AbstractCegarLoop]: Abstraction has 208 states and 269 transitions. [2024-09-11 19:27:43,081 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:43,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 269 transitions. [2024-09-11 19:27:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-11 19:27:43,082 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:43,082 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:43,096 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:43,282 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-11 19:27:43,283 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:43,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:43,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1998985234, now seen corresponding path program 7 times [2024-09-11 19:27:43,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:43,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87419121] [2024-09-11 19:27:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:43,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:43,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:43,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87419121] [2024-09-11 19:27:43,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87419121] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:43,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989615954] [2024-09-11 19:27:43,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:27:43,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:43,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:43,528 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:43,530 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-11 19:27:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:43,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-11 19:27:43,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-11 19:27:43,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-11 19:27:44,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989615954] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:44,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:44,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 24 [2024-09-11 19:27:44,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607369124] [2024-09-11 19:27:44,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:44,065 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-11 19:27:44,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:44,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-11 19:27:44,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2024-09-11 19:27:44,066 INFO L87 Difference]: Start difference. First operand 208 states and 269 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:47,452 INFO L93 Difference]: Finished difference Result 371 states and 516 transitions. [2024-09-11 19:27:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2024-09-11 19:27:47,453 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-09-11 19:27:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:47,454 INFO L225 Difference]: With dead ends: 371 [2024-09-11 19:27:47,454 INFO L226 Difference]: Without dead ends: 344 [2024-09-11 19:27:47,457 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5695 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1024, Invalid=16006, Unknown=0, NotChecked=0, Total=17030 [2024-09-11 19:27:47,458 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 150 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 2606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:47,458 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 77 Invalid, 2606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-11 19:27:47,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2024-09-11 19:27:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 243. [2024-09-11 19:27:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.2933884297520661) internal successors, (313), 242 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 313 transitions. [2024-09-11 19:27:47,579 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 313 transitions. Word has length 29 [2024-09-11 19:27:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:47,579 INFO L474 AbstractCegarLoop]: Abstraction has 243 states and 313 transitions. [2024-09-11 19:27:47,579 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:47,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 313 transitions. [2024-09-11 19:27:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-11 19:27:47,580 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:47,580 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:47,592 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:47,780 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:47,781 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:47,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:47,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1364550551, now seen corresponding path program 12 times [2024-09-11 19:27:47,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:47,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993514841] [2024-09-11 19:27:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:47,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-11 19:27:47,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:47,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993514841] [2024-09-11 19:27:47,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993514841] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:47,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337572877] [2024-09-11 19:27:47,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:27:47,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:47,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:47,968 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:47,969 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-11 19:27:48,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-11 19:27:48,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:48,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-11 19:27:48,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-11 19:27:48,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-11 19:27:48,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337572877] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:48,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:48,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-09-11 19:27:48,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394207697] [2024-09-11 19:27:48,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:48,172 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:27:48,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:48,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:27:48,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:27:48,173 INFO L87 Difference]: Start difference. First operand 243 states and 313 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:48,559 INFO L93 Difference]: Finished difference Result 315 states and 404 transitions. [2024-09-11 19:27:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 19:27:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-09-11 19:27:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:48,561 INFO L225 Difference]: With dead ends: 315 [2024-09-11 19:27:48,561 INFO L226 Difference]: Without dead ends: 305 [2024-09-11 19:27:48,562 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:27:48,562 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:48,562 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-09-11 19:27:48,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 252. [2024-09-11 19:27:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.302788844621514) internal successors, (327), 251 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 327 transitions. [2024-09-11 19:27:48,686 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 327 transitions. Word has length 30 [2024-09-11 19:27:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:48,687 INFO L474 AbstractCegarLoop]: Abstraction has 252 states and 327 transitions. [2024-09-11 19:27:48,687 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:48,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 327 transitions. [2024-09-11 19:27:48,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-11 19:27:48,688 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:48,688 INFO L216 NwaCegarLoop]: trace histogram [10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:48,701 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:48,888 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:48,888 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:48,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:48,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1055150441, now seen corresponding path program 13 times [2024-09-11 19:27:48,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:48,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471964693] [2024-09-11 19:27:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:48,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:27:49,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:49,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471964693] [2024-09-11 19:27:49,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471964693] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:49,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187177572] [2024-09-11 19:27:49,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:27:49,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:49,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:49,114 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:49,116 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-11 19:27:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:49,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-11 19:27:49,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-11 19:27:49,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-11 19:27:49,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187177572] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:49,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:49,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 8] total 26 [2024-09-11 19:27:49,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991958485] [2024-09-11 19:27:49,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:49,385 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 19:27:49,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:49,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 19:27:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2024-09-11 19:27:49,386 INFO L87 Difference]: Start difference. First operand 252 states and 327 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:50,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:50,296 INFO L93 Difference]: Finished difference Result 628 states and 862 transitions. [2024-09-11 19:27:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-11 19:27:50,296 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-09-11 19:27:50,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:50,299 INFO L225 Difference]: With dead ends: 628 [2024-09-11 19:27:50,299 INFO L226 Difference]: Without dead ends: 531 [2024-09-11 19:27:50,299 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2024-09-11 19:27:50,300 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 151 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:50,300 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 486 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 19:27:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2024-09-11 19:27:50,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 265. [2024-09-11 19:27:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.2765151515151516) internal successors, (337), 264 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 337 transitions. [2024-09-11 19:27:50,428 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 337 transitions. Word has length 30 [2024-09-11 19:27:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:50,428 INFO L474 AbstractCegarLoop]: Abstraction has 265 states and 337 transitions. [2024-09-11 19:27:50,428 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:50,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 337 transitions. [2024-09-11 19:27:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-11 19:27:50,429 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:50,429 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:50,444 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:50,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:50,630 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:50,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:50,630 INFO L85 PathProgramCache]: Analyzing trace with hash 982104067, now seen corresponding path program 14 times [2024-09-11 19:27:50,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:50,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321480857] [2024-09-11 19:27:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:50,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-11 19:27:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:50,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321480857] [2024-09-11 19:27:50,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321480857] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:50,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157711964] [2024-09-11 19:27:50,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:27:50,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:50,759 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:50,761 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-11 19:27:50,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:27:50,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:50,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-11 19:27:50,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-11 19:27:50,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-11 19:27:50,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157711964] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:50,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:50,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-11 19:27:50,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500111473] [2024-09-11 19:27:50,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:50,935 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 19:27:50,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:50,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 19:27:50,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:27:50,936 INFO L87 Difference]: Start difference. First operand 265 states and 337 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:51,169 INFO L93 Difference]: Finished difference Result 285 states and 364 transitions. [2024-09-11 19:27:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:27:51,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-09-11 19:27:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:51,171 INFO L225 Difference]: With dead ends: 285 [2024-09-11 19:27:51,171 INFO L226 Difference]: Without dead ends: 251 [2024-09-11 19:27:51,172 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 13 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:27:51,172 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:51,172 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-11 19:27:51,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2024-09-11 19:27:51,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.284) internal successors, (321), 250 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 321 transitions. [2024-09-11 19:27:51,311 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 321 transitions. Word has length 31 [2024-09-11 19:27:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:51,311 INFO L474 AbstractCegarLoop]: Abstraction has 251 states and 321 transitions. [2024-09-11 19:27:51,311 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:51,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 321 transitions. [2024-09-11 19:27:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-11 19:27:51,312 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:51,312 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:51,326 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:51,513 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-11 19:27:51,513 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:51,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:51,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1960777077, now seen corresponding path program 6 times [2024-09-11 19:27:51,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:51,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032272506] [2024-09-11 19:27:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:51,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-11 19:27:51,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:51,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032272506] [2024-09-11 19:27:51,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032272506] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:51,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351047439] [2024-09-11 19:27:51,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:27:51,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:51,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:51,768 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:51,769 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-11 19:27:51,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-11 19:27:51,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:51,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-11 19:27:51,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-11 19:27:51,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-11 19:27:52,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351047439] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:52,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:52,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 24 [2024-09-11 19:27:52,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74657453] [2024-09-11 19:27:52,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:52,235 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-11 19:27:52,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:52,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-11 19:27:52,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2024-09-11 19:27:52,236 INFO L87 Difference]: Start difference. First operand 251 states and 321 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:54,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:54,260 INFO L93 Difference]: Finished difference Result 375 states and 490 transitions. [2024-09-11 19:27:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-09-11 19:27:54,261 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-09-11 19:27:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:54,262 INFO L225 Difference]: With dead ends: 375 [2024-09-11 19:27:54,263 INFO L226 Difference]: Without dead ends: 342 [2024-09-11 19:27:54,263 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 51 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=631, Invalid=5531, Unknown=0, NotChecked=0, Total=6162 [2024-09-11 19:27:54,264 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:54,264 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 281 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:27:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-09-11 19:27:54,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 231. [2024-09-11 19:27:54,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.2869565217391303) internal successors, (296), 230 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 296 transitions. [2024-09-11 19:27:54,418 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 296 transitions. Word has length 31 [2024-09-11 19:27:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:54,418 INFO L474 AbstractCegarLoop]: Abstraction has 231 states and 296 transitions. [2024-09-11 19:27:54,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:54,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:54,418 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 296 transitions. [2024-09-11 19:27:54,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-11 19:27:54,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:54,419 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:54,436 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:54,619 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-11 19:27:54,620 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:54,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:54,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1581509034, now seen corresponding path program 15 times [2024-09-11 19:27:54,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:54,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616787062] [2024-09-11 19:27:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:54,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-11 19:27:54,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:54,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616787062] [2024-09-11 19:27:54,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616787062] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:54,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604389238] [2024-09-11 19:27:54,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:27:54,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:54,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:54,777 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:54,778 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-11 19:27:54,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 19:27:54,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:54,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-11 19:27:54,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-11 19:27:54,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-11 19:27:55,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604389238] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:55,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:55,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-09-11 19:27:55,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888490910] [2024-09-11 19:27:55,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:55,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:27:55,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:55,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:27:55,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:27:55,144 INFO L87 Difference]: Start difference. First operand 231 states and 296 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:55,716 INFO L93 Difference]: Finished difference Result 450 states and 624 transitions. [2024-09-11 19:27:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 19:27:55,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-09-11 19:27:55,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:55,718 INFO L225 Difference]: With dead ends: 450 [2024-09-11 19:27:55,718 INFO L226 Difference]: Without dead ends: 419 [2024-09-11 19:27:55,719 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2024-09-11 19:27:55,719 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:55,719 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 125 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2024-09-11 19:27:55,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 344. [2024-09-11 19:27:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.3236151603498543) internal successors, (454), 343 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 454 transitions. [2024-09-11 19:27:55,901 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 454 transitions. Word has length 32 [2024-09-11 19:27:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:55,901 INFO L474 AbstractCegarLoop]: Abstraction has 344 states and 454 transitions. [2024-09-11 19:27:55,901 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:55,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 454 transitions. [2024-09-11 19:27:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-11 19:27:55,903 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:55,903 INFO L216 NwaCegarLoop]: trace histogram [11, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:55,919 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:56,106 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-11 19:27:56,107 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:56,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:56,107 INFO L85 PathProgramCache]: Analyzing trace with hash 65669607, now seen corresponding path program 7 times [2024-09-11 19:27:56,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:56,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32724268] [2024-09-11 19:27:56,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:56,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-11 19:27:56,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:56,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32724268] [2024-09-11 19:27:56,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32724268] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:56,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783695683] [2024-09-11 19:27:56,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:27:56,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:56,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:56,337 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:56,339 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-11 19:27:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:56,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-11 19:27:56,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-11 19:27:56,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-11 19:27:56,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783695683] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:56,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:56,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 10] total 30 [2024-09-11 19:27:56,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192555538] [2024-09-11 19:27:56,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:56,661 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-11 19:27:56,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-11 19:27:56,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-09-11 19:27:56,662 INFO L87 Difference]: Start difference. First operand 344 states and 454 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:58,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:58,760 INFO L93 Difference]: Finished difference Result 716 states and 966 transitions. [2024-09-11 19:27:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-09-11 19:27:58,760 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-09-11 19:27:58,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:58,762 INFO L225 Difference]: With dead ends: 716 [2024-09-11 19:27:58,762 INFO L226 Difference]: Without dead ends: 551 [2024-09-11 19:27:58,763 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=595, Invalid=6545, Unknown=0, NotChecked=0, Total=7140 [2024-09-11 19:27:58,763 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 98 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:58,763 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 650 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:27:58,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2024-09-11 19:27:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 339. [2024-09-11 19:27:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.3254437869822486) internal successors, (448), 338 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 448 transitions. [2024-09-11 19:27:59,011 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 448 transitions. Word has length 32 [2024-09-11 19:27:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:59,011 INFO L474 AbstractCegarLoop]: Abstraction has 339 states and 448 transitions. [2024-09-11 19:27:59,011 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:59,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 448 transitions. [2024-09-11 19:27:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-11 19:27:59,012 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:59,013 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:59,029 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:59,213 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-11 19:27:59,213 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:59,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:59,214 INFO L85 PathProgramCache]: Analyzing trace with hash 521298375, now seen corresponding path program 8 times [2024-09-11 19:27:59,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:59,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736832936] [2024-09-11 19:27:59,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:59,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:27:59,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:59,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736832936] [2024-09-11 19:27:59,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736832936] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:59,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044083513] [2024-09-11 19:27:59,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:27:59,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:59,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:59,502 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:59,503 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-11 19:27:59,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:27:59,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:59,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-11 19:27:59,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-11 19:27:59,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-11 19:28:00,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044083513] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:00,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:00,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2024-09-11 19:28:00,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133843959] [2024-09-11 19:28:00,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:00,046 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 19:28:00,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:00,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 19:28:00,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2024-09-11 19:28:00,047 INFO L87 Difference]: Start difference. First operand 339 states and 448 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:03,971 INFO L93 Difference]: Finished difference Result 544 states and 722 transitions. [2024-09-11 19:28:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-09-11 19:28:03,971 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-09-11 19:28:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:03,973 INFO L225 Difference]: With dead ends: 544 [2024-09-11 19:28:03,974 INFO L226 Difference]: Without dead ends: 473 [2024-09-11 19:28:03,975 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 52 SyntacticMatches, 14 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6947 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1101, Invalid=19779, Unknown=0, NotChecked=0, Total=20880 [2024-09-11 19:28:03,975 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 156 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2773 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 2773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:03,976 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 118 Invalid, 2968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 2773 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-11 19:28:03,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2024-09-11 19:28:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 379. [2024-09-11 19:28:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.2883597883597884) internal successors, (487), 378 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 487 transitions. [2024-09-11 19:28:04,216 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 487 transitions. Word has length 34 [2024-09-11 19:28:04,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:04,216 INFO L474 AbstractCegarLoop]: Abstraction has 379 states and 487 transitions. [2024-09-11 19:28:04,217 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:04,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:04,217 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 487 transitions. [2024-09-11 19:28:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-11 19:28:04,218 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:04,218 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:04,231 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-11 19:28:04,422 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-11 19:28:04,422 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:04,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1548952418, now seen corresponding path program 16 times [2024-09-11 19:28:04,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:04,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456369974] [2024-09-11 19:28:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:04,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:28:04,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456369974] [2024-09-11 19:28:04,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456369974] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69152294] [2024-09-11 19:28:04,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:28:04,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:04,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:04,627 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:04,628 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-11 19:28:04,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:28:04,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:04,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-11 19:28:04,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:28:04,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:28:04,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69152294] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:04,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:04,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2024-09-11 19:28:04,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525623916] [2024-09-11 19:28:04,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:04,856 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 19:28:04,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:04,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 19:28:04,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-09-11 19:28:04,856 INFO L87 Difference]: Start difference. First operand 379 states and 487 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:05,269 INFO L93 Difference]: Finished difference Result 437 states and 559 transitions. [2024-09-11 19:28:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 19:28:05,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-09-11 19:28:05,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:05,271 INFO L225 Difference]: With dead ends: 437 [2024-09-11 19:28:05,271 INFO L226 Difference]: Without dead ends: 407 [2024-09-11 19:28:05,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-09-11 19:28:05,272 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:05,272 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 213 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:28:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2024-09-11 19:28:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 368. [2024-09-11 19:28:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.3079019073569482) internal successors, (480), 367 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 480 transitions. [2024-09-11 19:28:05,482 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 480 transitions. Word has length 35 [2024-09-11 19:28:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:05,482 INFO L474 AbstractCegarLoop]: Abstraction has 368 states and 480 transitions. [2024-09-11 19:28:05,482 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:05,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 480 transitions. [2024-09-11 19:28:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-11 19:28:05,484 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:05,484 INFO L216 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:05,500 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-11 19:28:05,687 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-11 19:28:05,688 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:05,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:05,688 INFO L85 PathProgramCache]: Analyzing trace with hash -198039884, now seen corresponding path program 17 times [2024-09-11 19:28:05,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:05,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181320051] [2024-09-11 19:28:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:05,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-11 19:28:05,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:05,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181320051] [2024-09-11 19:28:05,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181320051] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:05,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004449578] [2024-09-11 19:28:05,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:28:05,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:05,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:05,944 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:05,945 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-11 19:28:06,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-11 19:28:06,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:06,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-11 19:28:06,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:28:06,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-11 19:28:06,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004449578] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:06,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:06,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 27, 17] total 47 [2024-09-11 19:28:06,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766586088] [2024-09-11 19:28:06,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:06,800 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-11 19:28:06,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:06,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-11 19:28:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2024-09-11 19:28:06,801 INFO L87 Difference]: Start difference. First operand 368 states and 480 transitions. Second operand has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:11,179 INFO L93 Difference]: Finished difference Result 854 states and 1150 transitions. [2024-09-11 19:28:11,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2024-09-11 19:28:11,180 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-09-11 19:28:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:11,182 INFO L225 Difference]: With dead ends: 854 [2024-09-11 19:28:11,183 INFO L226 Difference]: Without dead ends: 686 [2024-09-11 19:28:11,184 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1911, Invalid=13589, Unknown=0, NotChecked=0, Total=15500 [2024-09-11 19:28:11,184 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 126 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 3101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:11,185 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 837 Invalid, 3101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-11 19:28:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2024-09-11 19:28:11,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 442. [2024-09-11 19:28:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.3514739229024944) internal successors, (596), 441 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 596 transitions. [2024-09-11 19:28:11,485 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 596 transitions. Word has length 35 [2024-09-11 19:28:11,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:11,485 INFO L474 AbstractCegarLoop]: Abstraction has 442 states and 596 transitions. [2024-09-11 19:28:11,485 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:11,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:11,486 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 596 transitions. [2024-09-11 19:28:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-11 19:28:11,487 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:11,487 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:11,503 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-11 19:28:11,687 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-11 19:28:11,687 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:11,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash 950310999, now seen corresponding path program 9 times [2024-09-11 19:28:11,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:11,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405090811] [2024-09-11 19:28:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:11,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-11 19:28:11,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:11,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405090811] [2024-09-11 19:28:11,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405090811] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:11,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727030598] [2024-09-11 19:28:11,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:28:11,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:11,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:11,901 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:11,903 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-11 19:28:11,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 19:28:11,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:11,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-11 19:28:11,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-11 19:28:12,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-11 19:28:12,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727030598] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:12,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:12,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 25 [2024-09-11 19:28:12,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601982750] [2024-09-11 19:28:12,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:12,360 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-11 19:28:12,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:12,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-11 19:28:12,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2024-09-11 19:28:12,361 INFO L87 Difference]: Start difference. First operand 442 states and 596 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:14,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:14,714 INFO L93 Difference]: Finished difference Result 654 states and 863 transitions. [2024-09-11 19:28:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-09-11 19:28:14,715 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-09-11 19:28:14,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:14,717 INFO L225 Difference]: With dead ends: 654 [2024-09-11 19:28:14,717 INFO L226 Difference]: Without dead ends: 601 [2024-09-11 19:28:14,718 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 62 SyntacticMatches, 12 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=602, Invalid=6370, Unknown=0, NotChecked=0, Total=6972 [2024-09-11 19:28:14,718 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 87 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:14,718 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 365 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-11 19:28:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2024-09-11 19:28:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 484. [2024-09-11 19:28:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.3250517598343685) internal successors, (640), 483 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 640 transitions. [2024-09-11 19:28:15,028 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 640 transitions. Word has length 36 [2024-09-11 19:28:15,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:15,028 INFO L474 AbstractCegarLoop]: Abstraction has 484 states and 640 transitions. [2024-09-11 19:28:15,028 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:15,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 640 transitions. [2024-09-11 19:28:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-11 19:28:15,030 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:15,030 INFO L216 NwaCegarLoop]: trace histogram [13, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:15,044 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-11 19:28:15,230 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-11 19:28:15,230 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:15,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1190733733, now seen corresponding path program 10 times [2024-09-11 19:28:15,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:15,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634387769] [2024-09-11 19:28:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:15,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-11 19:28:15,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:15,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634387769] [2024-09-11 19:28:15,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634387769] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:15,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512222205] [2024-09-11 19:28:15,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:28:15,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:15,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:15,517 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:15,518 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-11 19:28:15,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:28:15,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:15,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-11 19:28:15,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-11 19:28:15,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-09-11 19:28:15,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512222205] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:15,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:15,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 12] total 36 [2024-09-11 19:28:15,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777493673] [2024-09-11 19:28:15,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:15,943 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-11 19:28:15,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:15,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-11 19:28:15,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2024-09-11 19:28:15,944 INFO L87 Difference]: Start difference. First operand 484 states and 640 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:19,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:19,638 INFO L93 Difference]: Finished difference Result 968 states and 1292 transitions. [2024-09-11 19:28:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-09-11 19:28:19,638 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-09-11 19:28:19,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:19,641 INFO L225 Difference]: With dead ends: 968 [2024-09-11 19:28:19,641 INFO L226 Difference]: Without dead ends: 766 [2024-09-11 19:28:19,642 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3701 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=953, Invalid=12387, Unknown=0, NotChecked=0, Total=13340 [2024-09-11 19:28:19,642 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 122 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 2791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:19,642 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1020 Invalid, 2791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-11 19:28:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2024-09-11 19:28:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 529. [2024-09-11 19:28:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.2973484848484849) internal successors, (685), 528 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 685 transitions. [2024-09-11 19:28:19,946 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 685 transitions. Word has length 36 [2024-09-11 19:28:19,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:19,946 INFO L474 AbstractCegarLoop]: Abstraction has 529 states and 685 transitions. [2024-09-11 19:28:19,946 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:19,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 685 transitions. [2024-09-11 19:28:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-11 19:28:19,947 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:19,947 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:19,959 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-11 19:28:20,148 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:20,148 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:20,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:20,148 INFO L85 PathProgramCache]: Analyzing trace with hash -26888029, now seen corresponding path program 11 times [2024-09-11 19:28:20,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:20,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194152544] [2024-09-11 19:28:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:20,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-11 19:28:20,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:20,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194152544] [2024-09-11 19:28:20,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194152544] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:20,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607110553] [2024-09-11 19:28:20,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:28:20,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:20,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:20,358 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:20,360 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-11 19:28:20,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-11 19:28:20,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:20,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-11 19:28:20,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-11 19:28:20,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-11 19:28:21,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607110553] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:21,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:21,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2024-09-11 19:28:21,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61376313] [2024-09-11 19:28:21,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:21,023 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-11 19:28:21,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:21,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-11 19:28:21,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1561, Unknown=0, NotChecked=0, Total=1806 [2024-09-11 19:28:21,024 INFO L87 Difference]: Start difference. First operand 529 states and 685 transitions. Second operand has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:23,389 INFO L93 Difference]: Finished difference Result 821 states and 1073 transitions. [2024-09-11 19:28:23,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-09-11 19:28:23,390 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-09-11 19:28:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:23,392 INFO L225 Difference]: With dead ends: 821 [2024-09-11 19:28:23,392 INFO L226 Difference]: Without dead ends: 675 [2024-09-11 19:28:23,393 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=699, Invalid=6273, Unknown=0, NotChecked=0, Total=6972 [2024-09-11 19:28:23,393 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:23,393 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 543 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-11 19:28:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2024-09-11 19:28:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 507. [2024-09-11 19:28:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.290513833992095) internal successors, (653), 506 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 653 transitions. [2024-09-11 19:28:23,693 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 653 transitions. Word has length 37 [2024-09-11 19:28:23,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:23,693 INFO L474 AbstractCegarLoop]: Abstraction has 507 states and 653 transitions. [2024-09-11 19:28:23,694 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:23,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 653 transitions. [2024-09-11 19:28:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-11 19:28:23,695 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:23,695 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:23,707 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-11 19:28:23,895 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:23,896 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:23,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:23,896 INFO L85 PathProgramCache]: Analyzing trace with hash -9748541, now seen corresponding path program 12 times [2024-09-11 19:28:23,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:23,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289467573] [2024-09-11 19:28:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:23,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:28:24,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:24,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289467573] [2024-09-11 19:28:24,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289467573] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:24,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505492134] [2024-09-11 19:28:24,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:28:24,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:24,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:24,212 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:24,214 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-11 19:28:24,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-11 19:28:24,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:24,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-11 19:28:24,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-11 19:28:24,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-11 19:28:25,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505492134] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:25,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:25,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 30 [2024-09-11 19:28:25,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226278411] [2024-09-11 19:28:25,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:25,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-11 19:28:25,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:25,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-11 19:28:25,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2024-09-11 19:28:25,026 INFO L87 Difference]: Start difference. First operand 507 states and 653 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:30,869 INFO L93 Difference]: Finished difference Result 734 states and 1005 transitions. [2024-09-11 19:28:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2024-09-11 19:28:30,869 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-09-11 19:28:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:30,872 INFO L225 Difference]: With dead ends: 734 [2024-09-11 19:28:30,872 INFO L226 Difference]: Without dead ends: 670 [2024-09-11 19:28:30,874 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 56 SyntacticMatches, 16 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11688 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1497, Invalid=31809, Unknown=0, NotChecked=0, Total=33306 [2024-09-11 19:28:30,874 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 196 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 4045 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 4316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 4045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:30,874 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 169 Invalid, 4316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 4045 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-11 19:28:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2024-09-11 19:28:31,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 554. [2024-09-11 19:28:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.2784810126582278) internal successors, (707), 553 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 707 transitions. [2024-09-11 19:28:31,214 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 707 transitions. Word has length 37 [2024-09-11 19:28:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:31,215 INFO L474 AbstractCegarLoop]: Abstraction has 554 states and 707 transitions. [2024-09-11 19:28:31,215 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:31,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 707 transitions. [2024-09-11 19:28:31,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-11 19:28:31,216 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:31,217 INFO L216 NwaCegarLoop]: trace histogram [14, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:31,233 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-09-11 19:28:31,417 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:31,417 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:31,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:31,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1833428725, now seen corresponding path program 18 times [2024-09-11 19:28:31,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:31,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347700648] [2024-09-11 19:28:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:31,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-11 19:28:31,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:31,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347700648] [2024-09-11 19:28:31,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347700648] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:31,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480440146] [2024-09-11 19:28:31,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:28:31,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:31,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:31,700 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:31,701 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-11 19:28:31,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-11 19:28:31,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:31,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-11 19:28:31,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-11 19:28:31,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-11 19:28:32,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480440146] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:32,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:32,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 18] total 45 [2024-09-11 19:28:32,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937507499] [2024-09-11 19:28:32,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:32,577 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-11 19:28:32,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:32,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-11 19:28:32,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2024-09-11 19:28:32,578 INFO L87 Difference]: Start difference. First operand 554 states and 707 transitions. Second operand has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 45 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:41,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:41,914 INFO L93 Difference]: Finished difference Result 1088 states and 1437 transitions. [2024-09-11 19:28:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2024-09-11 19:28:41,915 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 45 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-09-11 19:28:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:41,917 INFO L225 Difference]: With dead ends: 1088 [2024-09-11 19:28:41,917 INFO L226 Difference]: Without dead ends: 809 [2024-09-11 19:28:41,919 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11277 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=3310, Invalid=34132, Unknown=0, NotChecked=0, Total=37442 [2024-09-11 19:28:41,920 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 185 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 4353 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 5198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 4353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:41,920 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1151 Invalid, 5198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 4353 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-11 19:28:41,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2024-09-11 19:28:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 490. [2024-09-11 19:28:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.3108384458077709) internal successors, (641), 489 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:42,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 641 transitions. [2024-09-11 19:28:42,254 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 641 transitions. Word has length 38 [2024-09-11 19:28:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:42,254 INFO L474 AbstractCegarLoop]: Abstraction has 490 states and 641 transitions. [2024-09-11 19:28:42,254 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 45 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:42,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:42,255 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 641 transitions. [2024-09-11 19:28:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-11 19:28:42,255 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:42,256 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:42,268 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-09-11 19:28:42,456 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-11 19:28:42,456 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:42,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2095916573, now seen corresponding path program 19 times [2024-09-11 19:28:42,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:42,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587361691] [2024-09-11 19:28:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:42,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-11 19:28:42,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:42,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587361691] [2024-09-11 19:28:42,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587361691] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:42,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283178535] [2024-09-11 19:28:42,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:28:42,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:42,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:42,613 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:42,614 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-11 19:28:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:42,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-11 19:28:42,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-11 19:28:42,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-11 19:28:42,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283178535] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:42,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:42,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2024-09-11 19:28:42,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315153422] [2024-09-11 19:28:42,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:42,794 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:28:42,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:42,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:28:42,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:28:42,795 INFO L87 Difference]: Start difference. First operand 490 states and 641 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:43,331 INFO L93 Difference]: Finished difference Result 526 states and 688 transitions. [2024-09-11 19:28:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 19:28:43,332 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-09-11 19:28:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:43,334 INFO L225 Difference]: With dead ends: 526 [2024-09-11 19:28:43,334 INFO L226 Difference]: Without dead ends: 498 [2024-09-11 19:28:43,334 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 69 SyntacticMatches, 14 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2024-09-11 19:28:43,335 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:43,335 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 106 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:28:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2024-09-11 19:28:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 494. [2024-09-11 19:28:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 1.306288032454361) internal successors, (644), 493 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 644 transitions. [2024-09-11 19:28:43,698 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 644 transitions. Word has length 39 [2024-09-11 19:28:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:43,698 INFO L474 AbstractCegarLoop]: Abstraction has 494 states and 644 transitions. [2024-09-11 19:28:43,698 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:43,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 644 transitions. [2024-09-11 19:28:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-11 19:28:43,700 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:43,700 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:43,713 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-11 19:28:43,900 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-11 19:28:43,901 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:43,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:43,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1306856644, now seen corresponding path program 8 times [2024-09-11 19:28:43,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:43,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252752403] [2024-09-11 19:28:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:43,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-11 19:28:44,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:44,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252752403] [2024-09-11 19:28:44,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252752403] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:44,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021000787] [2024-09-11 19:28:44,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:28:44,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:44,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:44,175 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:44,176 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-11 19:28:44,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:28:44,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:44,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-11 19:28:44,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-11 19:28:44,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-11 19:28:45,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021000787] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:45,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:45,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 25] total 56 [2024-09-11 19:28:45,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287718921] [2024-09-11 19:28:45,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:45,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-11 19:28:45,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:45,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-11 19:28:45,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=2707, Unknown=0, NotChecked=0, Total=3080 [2024-09-11 19:28:45,129 INFO L87 Difference]: Start difference. First operand 494 states and 644 transitions. Second operand has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 56 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:50,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:50,298 INFO L93 Difference]: Finished difference Result 1016 states and 1401 transitions. [2024-09-11 19:28:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2024-09-11 19:28:50,298 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 56 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-09-11 19:28:50,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:50,301 INFO L225 Difference]: With dead ends: 1016 [2024-09-11 19:28:50,301 INFO L226 Difference]: Without dead ends: 841 [2024-09-11 19:28:50,302 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9477 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2233, Invalid=29629, Unknown=0, NotChecked=0, Total=31862 [2024-09-11 19:28:50,303 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 438 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 5632 mSolverCounterSat, 1309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 6941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1309 IncrementalHoareTripleChecker+Valid, 5632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:50,303 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1098 Invalid, 6941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1309 Valid, 5632 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-11 19:28:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2024-09-11 19:28:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 565. [2024-09-11 19:28:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.3102836879432624) internal successors, (739), 564 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 739 transitions. [2024-09-11 19:28:50,813 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 739 transitions. Word has length 39 [2024-09-11 19:28:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:50,813 INFO L474 AbstractCegarLoop]: Abstraction has 565 states and 739 transitions. [2024-09-11 19:28:50,813 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 56 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:50,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:50,813 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 739 transitions. [2024-09-11 19:28:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-11 19:28:50,815 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:50,815 INFO L216 NwaCegarLoop]: trace histogram [15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:50,832 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-11 19:28:51,015 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:51,016 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:51,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:51,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1523051141, now seen corresponding path program 20 times [2024-09-11 19:28:51,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:51,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569259037] [2024-09-11 19:28:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:51,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-11 19:28:51,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:51,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569259037] [2024-09-11 19:28:51,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569259037] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:51,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986471898] [2024-09-11 19:28:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:28:51,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:51,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:51,305 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:51,307 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-11 19:28:51,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:28:51,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:51,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-09-11 19:28:51,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:28:51,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-11 19:28:52,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986471898] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:52,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:52,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31, 18] total 53 [2024-09-11 19:28:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635360457] [2024-09-11 19:28:52,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:52,134 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-11 19:28:52,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:52,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-11 19:28:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=2326, Unknown=0, NotChecked=0, Total=2756 [2024-09-11 19:28:52,135 INFO L87 Difference]: Start difference. First operand 565 states and 739 transitions. Second operand has 53 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 53 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:00,002 INFO L93 Difference]: Finished difference Result 1258 states and 1690 transitions. [2024-09-11 19:29:00,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2024-09-11 19:29:00,002 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 53 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-09-11 19:29:00,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:00,006 INFO L225 Difference]: With dead ends: 1258 [2024-09-11 19:29:00,006 INFO L226 Difference]: Without dead ends: 995 [2024-09-11 19:29:00,007 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11253 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3157, Invalid=30515, Unknown=0, NotChecked=0, Total=33672 [2024-09-11 19:29:00,007 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 152 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 5018 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 5642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 5018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:00,007 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1052 Invalid, 5642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 5018 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-11 19:29:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2024-09-11 19:29:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 605. [2024-09-11 19:29:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.2996688741721854) internal successors, (785), 604 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 785 transitions. [2024-09-11 19:29:00,503 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 785 transitions. Word has length 40 [2024-09-11 19:29:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:00,503 INFO L474 AbstractCegarLoop]: Abstraction has 605 states and 785 transitions. [2024-09-11 19:29:00,503 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 53 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:00,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 785 transitions. [2024-09-11 19:29:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-11 19:29:00,504 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:00,504 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:00,518 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-09-11 19:29:00,705 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:00,705 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:00,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash 95943779, now seen corresponding path program 21 times [2024-09-11 19:29:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:00,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027663790] [2024-09-11 19:29:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:00,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-11 19:29:00,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027663790] [2024-09-11 19:29:00,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027663790] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066300195] [2024-09-11 19:29:00,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:29:00,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:00,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:00,886 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:29:00,889 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-11 19:29:00,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-11 19:29:00,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:00,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-11 19:29:00,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-11 19:29:01,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-11 19:29:01,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066300195] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:01,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:01,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2024-09-11 19:29:01,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489655079] [2024-09-11 19:29:01,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:01,110 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:29:01,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:01,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:29:01,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:29:01,111 INFO L87 Difference]: Start difference. First operand 605 states and 785 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:01,642 INFO L93 Difference]: Finished difference Result 701 states and 924 transitions. [2024-09-11 19:29:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 19:29:01,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-09-11 19:29:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:01,645 INFO L225 Difference]: With dead ends: 701 [2024-09-11 19:29:01,645 INFO L226 Difference]: Without dead ends: 586 [2024-09-11 19:29:01,645 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 17 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:29:01,646 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:01,646 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 116 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:29:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2024-09-11 19:29:02,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2024-09-11 19:29:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.305982905982906) internal successors, (764), 585 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:02,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 764 transitions. [2024-09-11 19:29:02,120 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 764 transitions. Word has length 41 [2024-09-11 19:29:02,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:02,121 INFO L474 AbstractCegarLoop]: Abstraction has 586 states and 764 transitions. [2024-09-11 19:29:02,121 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:02,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:02,121 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 764 transitions. [2024-09-11 19:29:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-11 19:29:02,122 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:02,122 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:02,137 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-09-11 19:29:02,322 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-11 19:29:02,322 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:02,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:02,323 INFO L85 PathProgramCache]: Analyzing trace with hash 868131602, now seen corresponding path program 9 times [2024-09-11 19:29:02,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:02,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085431268] [2024-09-11 19:29:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:02,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:29:02,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:02,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085431268] [2024-09-11 19:29:02,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085431268] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:02,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565065667] [2024-09-11 19:29:02,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:29:02,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:02,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:02,752 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:29:02,753 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-11 19:29:02,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-11 19:29:02,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:02,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-11 19:29:02,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-11 19:29:03,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-11 19:29:03,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565065667] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:03,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:03,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 36 [2024-09-11 19:29:03,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460359198] [2024-09-11 19:29:03,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:03,672 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-11 19:29:03,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:03,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-11 19:29:03,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2024-09-11 19:29:03,672 INFO L87 Difference]: Start difference. First operand 586 states and 764 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:15,871 INFO L93 Difference]: Finished difference Result 935 states and 1344 transitions. [2024-09-11 19:29:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2024-09-11 19:29:15,871 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-09-11 19:29:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:15,874 INFO L225 Difference]: With dead ends: 935 [2024-09-11 19:29:15,874 INFO L226 Difference]: Without dead ends: 859 [2024-09-11 19:29:15,877 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 60 SyntacticMatches, 20 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26409 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=2755, Invalid=67735, Unknown=0, NotChecked=0, Total=70490 [2024-09-11 19:29:15,877 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 354 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 7914 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 8271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 7914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:15,878 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 164 Invalid, 8271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 7914 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-11 19:29:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2024-09-11 19:29:16,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 595. [2024-09-11 19:29:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.3063973063973064) internal successors, (776), 594 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 776 transitions. [2024-09-11 19:29:16,391 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 776 transitions. Word has length 41 [2024-09-11 19:29:16,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:16,392 INFO L474 AbstractCegarLoop]: Abstraction has 595 states and 776 transitions. [2024-09-11 19:29:16,392 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:16,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 776 transitions. [2024-09-11 19:29:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-11 19:29:16,393 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:16,393 INFO L216 NwaCegarLoop]: trace histogram [16, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:16,410 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-09-11 19:29:16,597 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-11 19:29:16,598 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:16,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:16,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1951566764, now seen corresponding path program 13 times [2024-09-11 19:29:16,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:16,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583735358] [2024-09-11 19:29:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:16,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-11 19:29:16,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:16,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583735358] [2024-09-11 19:29:16,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583735358] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:16,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328319235] [2024-09-11 19:29:16,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:29:16,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:16,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:16,969 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:29:16,971 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-11 19:29:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:17,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-11 19:29:17,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:29:17,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-09-11 19:29:17,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328319235] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:17,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:17,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 8] total 32 [2024-09-11 19:29:17,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700029299] [2024-09-11 19:29:17,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:17,257 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-11 19:29:17,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:17,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-11 19:29:17,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2024-09-11 19:29:17,257 INFO L87 Difference]: Start difference. First operand 595 states and 776 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:25,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:25,308 INFO L93 Difference]: Finished difference Result 1576 states and 2119 transitions. [2024-09-11 19:29:25,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2024-09-11 19:29:25,308 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-09-11 19:29:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:25,312 INFO L225 Difference]: With dead ends: 1576 [2024-09-11 19:29:25,312 INFO L226 Difference]: Without dead ends: 1314 [2024-09-11 19:29:25,313 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13423 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2342, Invalid=35878, Unknown=0, NotChecked=0, Total=38220 [2024-09-11 19:29:25,313 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 131 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 5277 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 5514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 5277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:25,313 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1048 Invalid, 5514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 5277 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-11 19:29:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2024-09-11 19:29:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 653. [2024-09-11 19:29:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 1.2745398773006136) internal successors, (831), 652 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 831 transitions. [2024-09-11 19:29:25,868 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 831 transitions. Word has length 41 [2024-09-11 19:29:25,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:25,868 INFO L474 AbstractCegarLoop]: Abstraction has 653 states and 831 transitions. [2024-09-11 19:29:25,868 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:25,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:25,869 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 831 transitions. [2024-09-11 19:29:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-11 19:29:25,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:25,870 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:25,886 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-09-11 19:29:26,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-11 19:29:26,070 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:26,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:26,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1180539274, now seen corresponding path program 22 times [2024-09-11 19:29:26,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:26,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524161333] [2024-09-11 19:29:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:26,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 22 proven. 38 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-11 19:29:26,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:26,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524161333] [2024-09-11 19:29:26,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524161333] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:26,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257730561] [2024-09-11 19:29:26,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:29:26,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:26,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:26,294 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:29:26,294 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-11 19:29:26,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:29:26,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:26,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-11 19:29:26,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-11 19:29:26,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-11 19:29:26,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257730561] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:26,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:26,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 21 [2024-09-11 19:29:26,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784265856] [2024-09-11 19:29:26,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:26,511 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:29:26,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:26,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:29:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:29:26,512 INFO L87 Difference]: Start difference. First operand 653 states and 831 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:34,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:29:38,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:29:42,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:29:54,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:29:58,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:30:11,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:30:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:30:21,105 INFO L93 Difference]: Finished difference Result 703 states and 895 transitions. [2024-09-11 19:30:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-11 19:30:21,106 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-09-11 19:30:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:30:21,108 INFO L225 Difference]: With dead ends: 703 [2024-09-11 19:30:21,108 INFO L226 Difference]: Without dead ends: 672 [2024-09-11 19:30:21,109 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=327, Invalid=1229, Unknown=4, NotChecked=0, Total=1560 [2024-09-11 19:30:21,109 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 60 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:30:21,109 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 152 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 167 Invalid, 6 Unknown, 0 Unchecked, 24.2s Time] [2024-09-11 19:30:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2024-09-11 19:30:21,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 672. [2024-09-11 19:30:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.2608047690014903) internal successors, (846), 671 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:30:21,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 846 transitions. [2024-09-11 19:30:21,662 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 846 transitions. Word has length 42 [2024-09-11 19:30:21,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:30:21,662 INFO L474 AbstractCegarLoop]: Abstraction has 672 states and 846 transitions. [2024-09-11 19:30:21,662 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:30:21,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:30:21,663 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 846 transitions. [2024-09-11 19:30:21,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-11 19:30:21,666 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:30:21,666 INFO L216 NwaCegarLoop]: trace histogram [17, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:30:21,679 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-09-11 19:30:21,866 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:30:21,867 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:30:21,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:30:21,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1083729058, now seen corresponding path program 23 times [2024-09-11 19:30:21,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:30:21,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069359123] [2024-09-11 19:30:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:30:21,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:30:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:30:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-11 19:30:22,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:30:22,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069359123] [2024-09-11 19:30:22,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069359123] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:30:22,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052975691] [2024-09-11 19:30:22,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:30:22,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:30:22,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:30:22,296 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:30:22,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-11 19:30:22,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-11 19:30:22,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:30:22,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-11 19:30:22,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:30:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-11 19:30:22,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:30:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2024-09-11 19:30:22,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052975691] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:30:22,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:30:22,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 10] total 41 [2024-09-11 19:30:22,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673702743] [2024-09-11 19:30:22,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:30:22,877 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-11 19:30:22,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:30:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-11 19:30:22,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2024-09-11 19:30:22,879 INFO L87 Difference]: Start difference. First operand 672 states and 846 transitions. Second operand has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:30:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:30:26,156 INFO L93 Difference]: Finished difference Result 1485 states and 1951 transitions. [2024-09-11 19:30:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-11 19:30:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-09-11 19:30:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:30:26,160 INFO L225 Difference]: With dead ends: 1485 [2024-09-11 19:30:26,160 INFO L226 Difference]: Without dead ends: 1224 [2024-09-11 19:30:26,160 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=754, Invalid=2906, Unknown=0, NotChecked=0, Total=3660 [2024-09-11 19:30:26,161 INFO L434 NwaCegarLoop]: 66 mSDtfsCounter, 385 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 3081 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 3081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:30:26,161 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1358 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 3081 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-11 19:30:26,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2024-09-11 19:30:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 649. [2024-09-11 19:30:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.2391975308641976) internal successors, (803), 648 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:30:26,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 803 transitions. [2024-09-11 19:30:26,679 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 803 transitions. Word has length 43 [2024-09-11 19:30:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:30:26,679 INFO L474 AbstractCegarLoop]: Abstraction has 649 states and 803 transitions. [2024-09-11 19:30:26,679 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:30:26,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:30:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 803 transitions. [2024-09-11 19:30:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-11 19:30:26,680 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:30:26,680 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:30:26,693 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-09-11 19:30:26,880 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:30:26,881 INFO L399 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:30:26,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:30:26,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1933002390, now seen corresponding path program 10 times [2024-09-11 19:30:26,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:30:26,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726196331] [2024-09-11 19:30:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:30:26,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:30:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:30:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:30:27,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:30:27,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726196331] [2024-09-11 19:30:27,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726196331] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:30:27,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125283881] [2024-09-11 19:30:27,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:30:27,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:30:27,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:30:27,271 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:30:27,272 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-11 19:30:27,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:30:27,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:30:27,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-11 19:30:27,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:30:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-09-11 19:30:27,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:30:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-09-11 19:30:28,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125283881] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:30:28,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:30:28,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 39 [2024-09-11 19:30:28,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281473807] [2024-09-11 19:30:28,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:30:28,398 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-11 19:30:28,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:30:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-11 19:30:28,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2024-09-11 19:30:28,399 INFO L87 Difference]: Start difference. First operand 649 states and 803 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:30:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:30:48,703 INFO L93 Difference]: Finished difference Result 1036 states and 1424 transitions. [2024-09-11 19:30:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 318 states. [2024-09-11 19:30:48,704 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-09-11 19:30:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:30:48,707 INFO L225 Difference]: With dead ends: 1036 [2024-09-11 19:30:48,707 INFO L226 Difference]: Without dead ends: 970 [2024-09-11 19:30:48,710 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 64 SyntacticMatches, 22 SemanticMatches, 334 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44124 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=3881, Invalid=108679, Unknown=0, NotChecked=0, Total=112560 [2024-09-11 19:30:48,710 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 473 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10997 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 11498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 10997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:30:48,710 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 178 Invalid, 11498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 10997 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-09-11 19:30:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2024-09-11 19:30:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 674. [2024-09-11 19:30:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 1.236255572065379) internal successors, (832), 673 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:30:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 832 transitions. [2024-09-11 19:30:49,285 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 832 transitions. Word has length 44 [2024-09-11 19:30:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:30:49,285 INFO L474 AbstractCegarLoop]: Abstraction has 674 states and 832 transitions. [2024-09-11 19:30:49,285 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:30:49,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:30:49,285 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 832 transitions. [2024-09-11 19:30:49,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-11 19:30:49,286 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:30:49,286 INFO L216 NwaCegarLoop]: trace histogram [18, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:30:49,297 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-09-11 19:30:49,486 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:30:49,486 INFO L399 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:30:49,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:30:49,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1262072841, now seen corresponding path program 14 times [2024-09-11 19:30:49,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:30:49,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860942245] [2024-09-11 19:30:49,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:30:49,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:30:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:30:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-11 19:30:49,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:30:49,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860942245] [2024-09-11 19:30:49,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860942245] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:30:49,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836708990] [2024-09-11 19:30:49,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:30:49,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:30:49,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:30:49,932 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:30:49,933 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-11 19:30:49,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:30:49,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:30:49,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-11 19:30:49,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:30:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-11 19:30:50,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:30:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-09-11 19:30:50,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836708990] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:30:50,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:30:50,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 14] total 45 [2024-09-11 19:30:50,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978406803] [2024-09-11 19:30:50,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:30:50,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-11 19:30:50,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:30:50,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-11 19:30:50,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2024-09-11 19:30:50,549 INFO L87 Difference]: Start difference. First operand 674 states and 832 transitions. Second operand has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:30:59,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:30:59,842 INFO L93 Difference]: Finished difference Result 1284 states and 1630 transitions. [2024-09-11 19:30:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2024-09-11 19:30:59,842 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-09-11 19:30:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:30:59,845 INFO L225 Difference]: With dead ends: 1284 [2024-09-11 19:30:59,846 INFO L226 Difference]: Without dead ends: 1016 [2024-09-11 19:30:59,847 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11063 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1736, Invalid=33046, Unknown=0, NotChecked=0, Total=34782 [2024-09-11 19:30:59,847 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 211 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 3709 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 4142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 3709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-11 19:30:59,847 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1473 Invalid, 4142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 3709 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-11 19:30:59,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2024-09-11 19:31:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 634. [2024-09-11 19:31:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.2417061611374407) internal successors, (786), 633 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 786 transitions. [2024-09-11 19:31:00,396 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 786 transitions. Word has length 44 [2024-09-11 19:31:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:31:00,396 INFO L474 AbstractCegarLoop]: Abstraction has 634 states and 786 transitions. [2024-09-11 19:31:00,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:00,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 786 transitions. [2024-09-11 19:31:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-11 19:31:00,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:31:00,397 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:31:00,410 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-09-11 19:31:00,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-09-11 19:31:00,598 INFO L399 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:31:00,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:00,598 INFO L85 PathProgramCache]: Analyzing trace with hash 987277686, now seen corresponding path program 24 times [2024-09-11 19:31:00,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:31:00,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821140112] [2024-09-11 19:31:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:00,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:31:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-11 19:31:00,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:31:00,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821140112] [2024-09-11 19:31:00,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821140112] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:31:00,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267143581] [2024-09-11 19:31:00,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:31:00,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:31:00,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:31:00,810 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:31:00,812 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-11 19:31:00,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-11 19:31:00,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:31:00,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-11 19:31:00,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:31:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-11 19:31:01,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:31:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-11 19:31:01,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267143581] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:31:01,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:31:01,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2024-09-11 19:31:01,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795503523] [2024-09-11 19:31:01,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:31:01,221 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 19:31:01,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:31:01,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 19:31:01,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:31:01,222 INFO L87 Difference]: Start difference. First operand 634 states and 786 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:01,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:31:01,916 INFO L93 Difference]: Finished difference Result 663 states and 830 transitions. [2024-09-11 19:31:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 19:31:01,917 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-09-11 19:31:01,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:31:01,919 INFO L225 Difference]: With dead ends: 663 [2024-09-11 19:31:01,919 INFO L226 Difference]: Without dead ends: 609 [2024-09-11 19:31:01,919 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 19 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:31:01,920 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:31:01,920 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 155 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:31:01,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2024-09-11 19:31:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2024-09-11 19:31:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.2483552631578947) internal successors, (759), 608 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:02,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 759 transitions. [2024-09-11 19:31:02,433 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 759 transitions. Word has length 46 [2024-09-11 19:31:02,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:31:02,433 INFO L474 AbstractCegarLoop]: Abstraction has 609 states and 759 transitions. [2024-09-11 19:31:02,433 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:02,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 759 transitions. [2024-09-11 19:31:02,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-11 19:31:02,435 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:31:02,435 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:31:02,451 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-09-11 19:31:02,635 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-09-11 19:31:02,636 INFO L399 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:31:02,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:02,636 INFO L85 PathProgramCache]: Analyzing trace with hash 296898423, now seen corresponding path program 15 times [2024-09-11 19:31:02,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:31:02,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898069942] [2024-09-11 19:31:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:02,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:31:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-11 19:31:03,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:31:03,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898069942] [2024-09-11 19:31:03,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898069942] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:31:03,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346377909] [2024-09-11 19:31:03,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:31:03,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:31:03,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:31:03,020 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:31:03,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-09-11 19:31:03,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-11 19:31:03,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:31:03,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-09-11 19:31:03,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:31:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-11 19:31:03,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:31:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-11 19:31:04,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346377909] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:31:04,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:31:04,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 63 [2024-09-11 19:31:04,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260801616] [2024-09-11 19:31:04,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:31:04,310 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-11 19:31:04,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:31:04,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-11 19:31:04,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=3445, Unknown=0, NotChecked=0, Total=3906 [2024-09-11 19:31:04,311 INFO L87 Difference]: Start difference. First operand 609 states and 759 transitions. Second operand has 63 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:31:21,257 INFO L93 Difference]: Finished difference Result 1163 states and 1451 transitions. [2024-09-11 19:31:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2024-09-11 19:31:21,257 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-09-11 19:31:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:31:21,261 INFO L225 Difference]: With dead ends: 1163 [2024-09-11 19:31:21,261 INFO L226 Difference]: Without dead ends: 962 [2024-09-11 19:31:21,264 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32200 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=4017, Invalid=86283, Unknown=0, NotChecked=0, Total=90300 [2024-09-11 19:31:21,264 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 264 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 6442 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 7267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 825 IncrementalHoareTripleChecker+Valid, 6442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-09-11 19:31:21,265 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 1302 Invalid, 7267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [825 Valid, 6442 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-09-11 19:31:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2024-09-11 19:31:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 586. [2024-09-11 19:31:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.2393162393162394) internal successors, (725), 585 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 725 transitions. [2024-09-11 19:31:21,796 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 725 transitions. Word has length 46 [2024-09-11 19:31:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:31:21,796 INFO L474 AbstractCegarLoop]: Abstraction has 586 states and 725 transitions. [2024-09-11 19:31:21,796 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:21,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 725 transitions. [2024-09-11 19:31:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-11 19:31:21,797 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:31:21,797 INFO L216 NwaCegarLoop]: trace histogram [19, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:31:21,810 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-09-11 19:31:21,998 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:31:21,998 INFO L399 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:31:21,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:21,998 INFO L85 PathProgramCache]: Analyzing trace with hash 463196581, now seen corresponding path program 25 times [2024-09-11 19:31:21,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:31:21,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689826094] [2024-09-11 19:31:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:21,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:31:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-11 19:31:22,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:31:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689826094] [2024-09-11 19:31:22,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689826094] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:31:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787198472] [2024-09-11 19:31:22,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:31:22,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:31:22,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:31:22,381 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:31:22,382 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-09-11 19:31:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:22,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-11 19:31:22,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:31:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-11 19:31:22,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:31:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-11 19:31:22,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787198472] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:31:22,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:31:22,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 7] total 33 [2024-09-11 19:31:22,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6693975] [2024-09-11 19:31:22,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:31:22,671 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-11 19:31:22,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:31:22,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-11 19:31:22,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=988, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 19:31:22,672 INFO L87 Difference]: Start difference. First operand 586 states and 725 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:31:27,487 INFO L93 Difference]: Finished difference Result 1240 states and 1599 transitions. [2024-09-11 19:31:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-09-11 19:31:27,488 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-09-11 19:31:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:31:27,491 INFO L225 Difference]: With dead ends: 1240 [2024-09-11 19:31:27,491 INFO L226 Difference]: Without dead ends: 1029 [2024-09-11 19:31:27,492 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=383, Invalid=11173, Unknown=0, NotChecked=0, Total=11556 [2024-09-11 19:31:27,492 INFO L434 NwaCegarLoop]: 78 mSDtfsCounter, 103 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 4911 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 5043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 4911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-11 19:31:27,493 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 1732 Invalid, 5043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4911 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-11 19:31:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states.