./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de62.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-de62.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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --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 19:28:24,373 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:28:24,425 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:28:24,440 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:28:24,441 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:28:24,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:28:24,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:28:24,476 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:28:24,476 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:28:24,477 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:28:24,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:28:24,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:28:24,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:28:24,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:28:24,478 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:28:24,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:28:24,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:28:24,485 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:28:24,486 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:28:24,486 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:28:24,487 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:28:24,487 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:28:24,488 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:28:24,488 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:28:24,488 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:28:24,488 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:28:24,489 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:28:24,489 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:28:24,489 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:28:24,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:28:24,490 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:28:24,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:28:24,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:28:24,491 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:28:24,491 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:28:24,491 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:28:24,491 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:28:24,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:28:24,492 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:28:24,492 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:28:24,492 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:28:24,493 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:28:24,493 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:28:24,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:28:24,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:28:24,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:28:24,772 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:28:24,773 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:28:24,774 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de62.c [2024-09-11 19:28:26,230 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:28:26,396 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:28:26,397 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de62.c [2024-09-11 19:28:26,403 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a767d5f42/8c498498c66345fa9d8b536bad62da9d/FLAG13221bc4b [2024-09-11 19:28:26,806 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a767d5f42/8c498498c66345fa9d8b536bad62da9d [2024-09-11 19:28:26,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:28:26,809 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:28:26,810 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:28:26,810 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:28:26,817 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:28:26,817 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:28:26" (1/1) ... [2024-09-11 19:28:26,818 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aaaccd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:26, skipping insertion in model container [2024-09-11 19:28:26,818 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:28:26" (1/1) ... [2024-09-11 19:28:26,847 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:28:27,001 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-de62.c[368,381] [2024-09-11 19:28:27,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:28:27,030 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:28:27,039 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-de62.c[368,381] [2024-09-11 19:28:27,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:28:27,058 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:28:27,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27 WrapperNode [2024-09-11 19:28:27,058 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:28:27,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:28:27,059 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:28:27,059 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:28:27,065 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (1/1) ... [2024-09-11 19:28:27,070 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (1/1) ... [2024-09-11 19:28:27,086 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2024-09-11 19:28:27,087 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:28:27,087 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:28:27,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:28:27,088 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:28:27,095 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (1/1) ... [2024-09-11 19:28:27,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (1/1) ... [2024-09-11 19:28:27,096 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (1/1) ... [2024-09-11 19:28:27,105 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 19:28:27,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (1/1) ... [2024-09-11 19:28:27,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (1/1) ... [2024-09-11 19:28:27,108 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (1/1) ... [2024-09-11 19:28:27,111 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (1/1) ... [2024-09-11 19:28:27,112 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (1/1) ... [2024-09-11 19:28:27,113 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (1/1) ... [2024-09-11 19:28:27,114 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:28:27,115 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:28:27,115 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:28:27,116 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:28:27,116 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (1/1) ... [2024-09-11 19:28:27,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:28:27,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:27,145 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 19:28:27,147 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 19:28:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:28:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:28:27,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:28:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:28:27,247 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:28:27,248 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:28:27,359 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-11 19:28:27,359 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:28:27,388 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:28:27,389 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-11 19:28:27,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:28:27 BoogieIcfgContainer [2024-09-11 19:28:27,389 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:28:27,391 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:28:27,392 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:28:27,398 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:28:27,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:28:26" (1/3) ... [2024-09-11 19:28:27,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388b4ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:28:27, skipping insertion in model container [2024-09-11 19:28:27,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:28:27" (2/3) ... [2024-09-11 19:28:27,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388b4ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:28:27, skipping insertion in model container [2024-09-11 19:28:27,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:28:27" (3/3) ... [2024-09-11 19:28:27,403 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2024-09-11 19:28:27,417 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:28:27,417 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:28:27,457 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:28:27,463 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;@6b4495f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:28:27,464 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:28:27,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 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 19:28:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-11 19:28:27,473 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:27,473 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:27,474 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:27,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1862478825, now seen corresponding path program 1 times [2024-09-11 19:28:27,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:27,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158642229] [2024-09-11 19:28:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:27,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:27,661 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 19:28:27,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:27,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158642229] [2024-09-11 19:28:27,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158642229] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:28:27,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:28:27,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:28:27,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424092058] [2024-09-11 19:28:27,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:28:27,671 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:28:27,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:27,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:28:27,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:28:27,696 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 19:28:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:27,721 INFO L93 Difference]: Finished difference Result 26 states and 48 transitions. [2024-09-11 19:28:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:28:27,724 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 19:28:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:27,732 INFO L225 Difference]: With dead ends: 26 [2024-09-11 19:28:27,732 INFO L226 Difference]: Without dead ends: 12 [2024-09-11 19:28:27,735 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 19:28:27,740 INFO L434 NwaCegarLoop]: 17 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, 17 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 19:28:27,741 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:28:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-09-11 19:28:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-09-11 19:28:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 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 19:28:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2024-09-11 19:28:27,772 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 11 [2024-09-11 19:28:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:27,775 INFO L474 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2024-09-11 19:28:27,775 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 19:28:27,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2024-09-11 19:28:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-11 19:28:27,777 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:27,777 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:27,777 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:28:27,778 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:27,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:27,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1976995429, now seen corresponding path program 1 times [2024-09-11 19:28:27,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:27,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596718618] [2024-09-11 19:28:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:27,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:28,064 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 19:28:28,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:28,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596718618] [2024-09-11 19:28:28,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596718618] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:28:28,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:28:28,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-11 19:28:28,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773622326] [2024-09-11 19:28:28,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:28:28,069 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:28:28,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:28,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:28:28,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:28:28,071 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 19:28:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:28,136 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2024-09-11 19:28:28,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:28:28,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 19:28:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:28,139 INFO L225 Difference]: With dead ends: 26 [2024-09-11 19:28:28,139 INFO L226 Difference]: Without dead ends: 17 [2024-09-11 19:28:28,140 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 19:28:28,142 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:28,143 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:28:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-11 19:28:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-11 19:28:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 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 19:28:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2024-09-11 19:28:28,157 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 25 transitions. Word has length 11 [2024-09-11 19:28:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:28,157 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 25 transitions. [2024-09-11 19:28:28,171 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 19:28:28,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 25 transitions. [2024-09-11 19:28:28,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-11 19:28:28,172 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:28,172 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:28,172 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 19:28:28,173 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:28,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:28,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1155650727, now seen corresponding path program 1 times [2024-09-11 19:28:28,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:28,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761090424] [2024-09-11 19:28:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:28,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:28,248 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 19:28:28,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:28,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761090424] [2024-09-11 19:28:28,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761090424] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:28:28,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:28:28,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 19:28:28,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201850083] [2024-09-11 19:28:28,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:28:28,250 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-11 19:28:28,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:28,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-11 19:28:28,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 19:28:28,252 INFO L87 Difference]: Start difference. First operand 17 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) 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 19:28:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:28,298 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2024-09-11 19:28:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-11 19:28:28,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) 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 19:28:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:28,301 INFO L225 Difference]: With dead ends: 40 [2024-09-11 19:28:28,301 INFO L226 Difference]: Without dead ends: 27 [2024-09-11 19:28:28,301 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 19:28:28,302 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:28,303 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:28:28,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-11 19:28:28,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-11 19:28:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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 19:28:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 40 transitions. [2024-09-11 19:28:28,328 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 40 transitions. Word has length 12 [2024-09-11 19:28:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:28,328 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 40 transitions. [2024-09-11 19:28:28,329 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) 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 19:28:28,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 40 transitions. [2024-09-11 19:28:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-11 19:28:28,331 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:28,332 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:28,332 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-11 19:28:28,332 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:28,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:28,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1110398198, now seen corresponding path program 1 times [2024-09-11 19:28:28,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:28,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011575381] [2024-09-11 19:28:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:28,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:28,382 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 19:28:28,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:28,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011575381] [2024-09-11 19:28:28,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011575381] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:28:28,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:28:28,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 19:28:28,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673826469] [2024-09-11 19:28:28,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:28:28,384 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-11 19:28:28,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-11 19:28:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 19:28:28,385 INFO L87 Difference]: Start difference. First operand 27 states and 40 transitions. Second operand has 3 states, 3 states have (on average 4.0) 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 19:28:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:28,419 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2024-09-11 19:28:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-11 19:28:28,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) 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 19:28:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:28,421 INFO L225 Difference]: With dead ends: 42 [2024-09-11 19:28:28,421 INFO L226 Difference]: Without dead ends: 31 [2024-09-11 19:28:28,422 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 19:28:28,423 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 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 19:28:28,423 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:28:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-11 19:28:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-11 19:28:28,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.5) internal successors, (45), 30 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 19:28:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2024-09-11 19:28:28,435 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 12 [2024-09-11 19:28:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:28,436 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2024-09-11 19:28:28,436 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) 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 19:28:28,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2024-09-11 19:28:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-11 19:28:28,437 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:28,437 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:28,438 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-11 19:28:28,438 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:28,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:28,439 INFO L85 PathProgramCache]: Analyzing trace with hash 141528505, now seen corresponding path program 1 times [2024-09-11 19:28:28,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:28,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111918428] [2024-09-11 19:28:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:28,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:28,516 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 19:28:28,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:28,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111918428] [2024-09-11 19:28:28,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111918428] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:28:28,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:28:28,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 19:28:28,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023715931] [2024-09-11 19:28:28,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:28:28,517 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:28:28,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:28,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:28:28,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:28:28,518 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 19:28:28,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:28,591 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2024-09-11 19:28:28,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:28:28,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 19:28:28,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:28,592 INFO L225 Difference]: With dead ends: 40 [2024-09-11 19:28:28,592 INFO L226 Difference]: Without dead ends: 27 [2024-09-11 19:28:28,593 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 19:28:28,594 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 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 19:28:28,594 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:28:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-11 19:28:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-11 19:28:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 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 19:28:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2024-09-11 19:28:28,611 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 14 [2024-09-11 19:28:28,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:28,612 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2024-09-11 19:28:28,612 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 19:28:28,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2024-09-11 19:28:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-11 19:28:28,614 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:28,614 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:28,614 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-11 19:28:28,615 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:28,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1611499544, now seen corresponding path program 1 times [2024-09-11 19:28:28,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:28,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572911893] [2024-09-11 19:28:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:28,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:28,750 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 19:28:28,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:28,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572911893] [2024-09-11 19:28:28,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572911893] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:28,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126163882] [2024-09-11 19:28:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:28,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:28,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:28,756 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 19:28:28,758 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 19:28:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:28,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-11 19:28:28,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:28,867 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 19:28:28,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:28,913 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 19:28:28,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126163882] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:28,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:28:28,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-09-11 19:28:28,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239639862] [2024-09-11 19:28:28,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:28:28,916 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:28:28,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:28,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:28:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:28:28,917 INFO L87 Difference]: Start difference. First operand 27 states and 39 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 19:28:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:28,959 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2024-09-11 19:28:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:28:28,960 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 19:28:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:28,960 INFO L225 Difference]: With dead ends: 34 [2024-09-11 19:28:28,961 INFO L226 Difference]: Without dead ends: 24 [2024-09-11 19:28:28,961 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:28:28,962 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:28,962 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:28:28,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-11 19:28:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-11 19:28:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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 19:28:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2024-09-11 19:28:28,969 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 14 [2024-09-11 19:28:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:28,969 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2024-09-11 19:28:28,969 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 19:28:28,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:28,970 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2024-09-11 19:28:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-11 19:28:28,971 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:28,971 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:28,989 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 19:28:29,175 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 19:28:29,176 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:29,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:29,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2082676004, now seen corresponding path program 1 times [2024-09-11 19:28:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:29,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265542321] [2024-09-11 19:28:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:29,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:28:29,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:29,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265542321] [2024-09-11 19:28:29,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265542321] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:29,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697221346] [2024-09-11 19:28:29,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:29,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:29,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:29,266 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 19:28:29,269 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 19:28:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:29,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 19:28:29,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:28:29,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 19:28:29,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697221346] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:29,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:29,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-09-11 19:28:29,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643525540] [2024-09-11 19:28:29,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:29,443 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 19:28:29,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:29,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 19:28:29,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:28:29,445 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 19:28:29,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:29,623 INFO L93 Difference]: Finished difference Result 89 states and 142 transitions. [2024-09-11 19:28:29,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 19:28:29,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 15 [2024-09-11 19:28:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:29,627 INFO L225 Difference]: With dead ends: 89 [2024-09-11 19:28:29,627 INFO L226 Difference]: Without dead ends: 72 [2024-09-11 19:28:29,627 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:28:29,628 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:29,629 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 59 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:28:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-11 19:28:29,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2024-09-11 19:28:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 51 states have internal predecessors, (78), 0 states have call successors, (0), 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 19:28:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 78 transitions. [2024-09-11 19:28:29,661 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 78 transitions. Word has length 15 [2024-09-11 19:28:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:29,661 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 78 transitions. [2024-09-11 19:28:29,661 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 19:28:29,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 78 transitions. [2024-09-11 19:28:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-11 19:28:29,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:29,662 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:29,679 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 19:28:29,863 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 19:28:29,864 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:29,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:29,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1755904316, now seen corresponding path program 1 times [2024-09-11 19:28:29,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:29,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234551090] [2024-09-11 19:28:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:29,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:29,941 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 19:28:29,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:29,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234551090] [2024-09-11 19:28:29,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234551090] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:29,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122244385] [2024-09-11 19:28:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:29,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:29,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:29,944 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 19:28:29,946 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 19:28:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:29,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-11 19:28:29,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:28:30,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:28:30,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122244385] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:30,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:30,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-11 19:28:30,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621988679] [2024-09-11 19:28:30,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:30,072 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:28:30,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:28:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:28:30,073 INFO L87 Difference]: Start difference. First operand 52 states and 78 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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 19:28:30,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:30,207 INFO L93 Difference]: Finished difference Result 168 states and 258 transitions. [2024-09-11 19:28:30,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:28:30,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 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 19:28:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:30,210 INFO L225 Difference]: With dead ends: 168 [2024-09-11 19:28:30,210 INFO L226 Difference]: Without dead ends: 145 [2024-09-11 19:28:30,210 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:28:30,211 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:30,211 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 38 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:28:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-11 19:28:30,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 82. [2024-09-11 19:28:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 81 states have internal predecessors, (122), 0 states have call successors, (0), 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 19:28:30,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 122 transitions. [2024-09-11 19:28:30,251 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 122 transitions. Word has length 15 [2024-09-11 19:28:30,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:30,251 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 122 transitions. [2024-09-11 19:28:30,251 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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 19:28:30,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:30,252 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 122 transitions. [2024-09-11 19:28:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-11 19:28:30,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:30,253 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:30,269 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 19:28:30,453 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 19:28:30,453 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:30,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:30,454 INFO L85 PathProgramCache]: Analyzing trace with hash -861868215, now seen corresponding path program 1 times [2024-09-11 19:28:30,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:30,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428892277] [2024-09-11 19:28:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:30,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:28:30,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:30,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428892277] [2024-09-11 19:28:30,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428892277] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:30,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664574841] [2024-09-11 19:28:30,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:30,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:30,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:30,571 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 19:28:30,572 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 19:28:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:30,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:28:30,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:28:30,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:28:30,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664574841] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:30,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:30,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-09-11 19:28:30,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116237228] [2024-09-11 19:28:30,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:30,704 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:28:30,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:30,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:28:30,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:28:30,705 INFO L87 Difference]: Start difference. First operand 82 states and 122 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 19:28:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:31,025 INFO L93 Difference]: Finished difference Result 156 states and 233 transitions. [2024-09-11 19:28:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 19:28:31,025 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 16 [2024-09-11 19:28:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:31,026 INFO L225 Difference]: With dead ends: 156 [2024-09-11 19:28:31,026 INFO L226 Difference]: Without dead ends: 122 [2024-09-11 19:28:31,027 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:28:31,027 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:31,027 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 72 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:28:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-11 19:28:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2024-09-11 19:28:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.45) internal successors, (145), 100 states have internal predecessors, (145), 0 states have call successors, (0), 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 19:28:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2024-09-11 19:28:31,070 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 16 [2024-09-11 19:28:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:31,072 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2024-09-11 19:28:31,072 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 19:28:31,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2024-09-11 19:28:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-11 19:28:31,073 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:31,074 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:31,091 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 19:28:31,274 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 19:28:31,274 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:31,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:31,275 INFO L85 PathProgramCache]: Analyzing trace with hash 456382938, now seen corresponding path program 1 times [2024-09-11 19:28:31,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:31,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855339451] [2024-09-11 19:28:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:31,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:28:31,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:31,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855339451] [2024-09-11 19:28:31,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855339451] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:31,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790864488] [2024-09-11 19:28:31,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:31,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:31,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:31,401 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 19:28:31,402 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 19:28:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:31,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-11 19:28:31,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:28:31,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:28:31,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790864488] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:31,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:31,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-09-11 19:28:31,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897655771] [2024-09-11 19:28:31,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:31,562 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:28:31,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:31,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:28:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:28:31,563 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 19:28:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:31,644 INFO L93 Difference]: Finished difference Result 130 states and 187 transitions. [2024-09-11 19:28:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:28:31,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-09-11 19:28:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:31,646 INFO L225 Difference]: With dead ends: 130 [2024-09-11 19:28:31,647 INFO L226 Difference]: Without dead ends: 115 [2024-09-11 19:28:31,647 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:28:31,647 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:31,648 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:28:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-11 19:28:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2024-09-11 19:28:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.5) internal successors, (144), 96 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 19:28:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 144 transitions. [2024-09-11 19:28:31,693 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 144 transitions. Word has length 17 [2024-09-11 19:28:31,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:31,693 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 144 transitions. [2024-09-11 19:28:31,694 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 19:28:31,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 144 transitions. [2024-09-11 19:28:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-11 19:28:31,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:31,696 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:31,715 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 19:28:31,897 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 19:28:31,897 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:31,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:31,898 INFO L85 PathProgramCache]: Analyzing trace with hash -192617351, now seen corresponding path program 2 times [2024-09-11 19:28:31,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:31,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379373458] [2024-09-11 19:28:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:31,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 19:28:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:31,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379373458] [2024-09-11 19:28:31,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379373458] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:31,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432591995] [2024-09-11 19:28:31,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:28:31,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:31,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:31,980 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 19:28:31,982 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 19:28:32,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:28:32,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:32,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 19:28:32,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 19:28:32,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 19:28:32,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432591995] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:32,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:32,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-09-11 19:28:32,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837516096] [2024-09-11 19:28:32,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:32,145 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 19:28:32,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:32,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 19:28:32,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:28:32,146 INFO L87 Difference]: Start difference. First operand 97 states and 144 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 19:28:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:32,333 INFO L93 Difference]: Finished difference Result 137 states and 204 transitions. [2024-09-11 19:28:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 19:28:32,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 18 [2024-09-11 19:28:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:32,335 INFO L225 Difference]: With dead ends: 137 [2024-09-11 19:28:32,335 INFO L226 Difference]: Without dead ends: 92 [2024-09-11 19:28:32,336 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:28:32,336 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:32,337 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 85 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:28:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-11 19:28:32,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2024-09-11 19:28:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4819277108433735) internal successors, (123), 83 states have internal predecessors, (123), 0 states have call successors, (0), 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 19:28:32,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 123 transitions. [2024-09-11 19:28:32,374 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 123 transitions. Word has length 18 [2024-09-11 19:28:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:32,375 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 123 transitions. [2024-09-11 19:28:32,375 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 19:28:32,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 123 transitions. [2024-09-11 19:28:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-11 19:28:32,378 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:32,378 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:32,395 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 19:28:32,579 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 19:28:32,579 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:32,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash -369506181, now seen corresponding path program 3 times [2024-09-11 19:28:32,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:32,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460295357] [2024-09-11 19:28:32,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:32,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:28:32,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:32,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460295357] [2024-09-11 19:28:32,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460295357] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:32,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859799859] [2024-09-11 19:28:32,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:28:32,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:32,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:32,722 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 19:28:32,723 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 19:28:32,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-11 19:28:32,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:32,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 19:28:32,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:28:32,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:28:32,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859799859] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:32,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:32,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2024-09-11 19:28:32,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075483898] [2024-09-11 19:28:32,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:32,966 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 19:28:32,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:32,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 19:28:32,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:28:32,967 INFO L87 Difference]: Start difference. First operand 84 states and 123 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 19:28:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:33,338 INFO L93 Difference]: Finished difference Result 139 states and 205 transitions. [2024-09-11 19:28:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 19:28:33,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 19 [2024-09-11 19:28:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:33,339 INFO L225 Difference]: With dead ends: 139 [2024-09-11 19:28:33,339 INFO L226 Difference]: Without dead ends: 84 [2024-09-11 19:28:33,340 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-09-11 19:28:33,340 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:33,341 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:28:33,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-11 19:28:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2024-09-11 19:28:33,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 72 states have internal predecessors, (104), 0 states have call successors, (0), 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 19:28:33,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 104 transitions. [2024-09-11 19:28:33,366 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 104 transitions. Word has length 19 [2024-09-11 19:28:33,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:33,366 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 104 transitions. [2024-09-11 19:28:33,366 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 19:28:33,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 104 transitions. [2024-09-11 19:28:33,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-11 19:28:33,367 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:33,367 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:33,384 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 19:28:33,568 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 19:28:33,569 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:33,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -337957572, now seen corresponding path program 4 times [2024-09-11 19:28:33,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:33,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579150338] [2024-09-11 19:28:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:33,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-11 19:28:33,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:33,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579150338] [2024-09-11 19:28:33,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579150338] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:33,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157351127] [2024-09-11 19:28:33,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:28:33,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:33,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:33,681 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 19:28:33,682 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 19:28:33,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:28:33,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:33,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-11 19:28:33,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:28:33,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-11 19:28:33,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157351127] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:33,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:33,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 17 [2024-09-11 19:28:33,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168434038] [2024-09-11 19:28:33,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:33,895 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 19:28:33,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:33,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 19:28:33,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-09-11 19:28:33,896 INFO L87 Difference]: Start difference. First operand 73 states and 104 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 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 19:28:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:34,439 INFO L93 Difference]: Finished difference Result 167 states and 253 transitions. [2024-09-11 19:28:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-11 19:28:34,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 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 19:28:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:34,441 INFO L225 Difference]: With dead ends: 167 [2024-09-11 19:28:34,441 INFO L226 Difference]: Without dead ends: 133 [2024-09-11 19:28:34,441 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2024-09-11 19:28:34,442 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:34,442 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 114 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:28:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-11 19:28:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2024-09-11 19:28:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.4455445544554455) internal successors, (146), 101 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 19:28:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 146 transitions. [2024-09-11 19:28:34,486 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 146 transitions. Word has length 21 [2024-09-11 19:28:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:34,487 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 146 transitions. [2024-09-11 19:28:34,487 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 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 19:28:34,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 146 transitions. [2024-09-11 19:28:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-11 19:28:34,489 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:34,489 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:34,506 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 19:28:34,693 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 19:28:34,694 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:34,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash -846276983, now seen corresponding path program 5 times [2024-09-11 19:28:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:34,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411301475] [2024-09-11 19:28:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:34,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:28:34,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:34,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411301475] [2024-09-11 19:28:34,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411301475] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:34,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131009098] [2024-09-11 19:28:34,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:28:34,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:34,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:34,847 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 19:28:34,848 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 19:28:34,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-11 19:28:34,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:34,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-11 19:28:34,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 19:28:35,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 19:28:35,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131009098] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:35,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:35,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2024-09-11 19:28:35,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883973849] [2024-09-11 19:28:35,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:35,262 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-11 19:28:35,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:35,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-11 19:28:35,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2024-09-11 19:28:35,263 INFO L87 Difference]: Start difference. First operand 102 states and 146 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 19:28:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:36,730 INFO L93 Difference]: Finished difference Result 204 states and 312 transitions. [2024-09-11 19:28:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-11 19:28:36,731 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 22 [2024-09-11 19:28:36,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:36,732 INFO L225 Difference]: With dead ends: 204 [2024-09-11 19:28:36,732 INFO L226 Difference]: Without dead ends: 160 [2024-09-11 19:28:36,734 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=825, Invalid=3465, Unknown=0, NotChecked=0, Total=4290 [2024-09-11 19:28:36,735 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 84 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:36,735 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 197 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 19:28:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-11 19:28:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 107. [2024-09-11 19:28:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.3773584905660377) internal successors, (146), 106 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 19:28:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 146 transitions. [2024-09-11 19:28:36,773 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 146 transitions. Word has length 22 [2024-09-11 19:28:36,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:36,773 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 146 transitions. [2024-09-11 19:28:36,773 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 19:28:36,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 146 transitions. [2024-09-11 19:28:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-11 19:28:36,776 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:36,776 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:36,793 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 19:28:36,976 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 19:28:36,976 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:36,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:36,977 INFO L85 PathProgramCache]: Analyzing trace with hash 640670314, now seen corresponding path program 1 times [2024-09-11 19:28:36,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:36,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367718830] [2024-09-11 19:28:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:36,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-11 19:28:37,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:37,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367718830] [2024-09-11 19:28:37,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367718830] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:37,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776053909] [2024-09-11 19:28:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:37,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:37,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:37,100 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 19:28:37,101 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 19:28:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:37,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-11 19:28:37,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:28:37,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-11 19:28:37,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776053909] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:37,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:37,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 5] total 16 [2024-09-11 19:28:37,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043388698] [2024-09-11 19:28:37,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:37,267 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 19:28:37,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 19:28:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-11 19:28:37,268 INFO L87 Difference]: Start difference. First operand 107 states and 146 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 19:28:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:37,674 INFO L93 Difference]: Finished difference Result 221 states and 326 transitions. [2024-09-11 19:28:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-11 19:28:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 22 [2024-09-11 19:28:37,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:37,675 INFO L225 Difference]: With dead ends: 221 [2024-09-11 19:28:37,675 INFO L226 Difference]: Without dead ends: 172 [2024-09-11 19:28:37,676 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 19:28:37,677 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:37,677 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 147 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:28:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-11 19:28:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2024-09-11 19:28:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3823529411764706) internal successors, (188), 136 states have internal predecessors, (188), 0 states have call successors, (0), 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 19:28:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 188 transitions. [2024-09-11 19:28:37,721 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 188 transitions. Word has length 22 [2024-09-11 19:28:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:37,721 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 188 transitions. [2024-09-11 19:28:37,722 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 19:28:37,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 188 transitions. [2024-09-11 19:28:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-11 19:28:37,722 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:37,722 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:37,739 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 19:28:37,923 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 19:28:37,923 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:37,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:37,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1904897495, now seen corresponding path program 2 times [2024-09-11 19:28:37,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:37,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509623980] [2024-09-11 19:28:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:37,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:28:38,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:38,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509623980] [2024-09-11 19:28:38,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509623980] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:38,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022673229] [2024-09-11 19:28:38,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:28:38,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:38,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:38,061 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 19:28:38,062 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 19:28:38,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:28:38,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:38,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-11 19:28:38,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:28:38,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:28:38,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022673229] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:38,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:38,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 18 [2024-09-11 19:28:38,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249538810] [2024-09-11 19:28:38,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:38,287 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 19:28:38,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:38,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 19:28:38,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-09-11 19:28:38,288 INFO L87 Difference]: Start difference. First operand 137 states and 188 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 19:28:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:38,567 INFO L93 Difference]: Finished difference Result 327 states and 486 transitions. [2024-09-11 19:28:38,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 19:28:38,568 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 22 [2024-09-11 19:28:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:38,569 INFO L225 Difference]: With dead ends: 327 [2024-09-11 19:28:38,569 INFO L226 Difference]: Without dead ends: 260 [2024-09-11 19:28:38,570 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:28:38,570 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 85 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:38,570 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 186 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:28:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-09-11 19:28:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 188. [2024-09-11 19:28:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.374331550802139) internal successors, (257), 187 states have internal predecessors, (257), 0 states have call successors, (0), 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 19:28:38,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 257 transitions. [2024-09-11 19:28:38,616 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 257 transitions. Word has length 22 [2024-09-11 19:28:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:38,617 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 257 transitions. [2024-09-11 19:28:38,617 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 19:28:38,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:38,617 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 257 transitions. [2024-09-11 19:28:38,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-11 19:28:38,618 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:38,618 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:38,629 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 19:28:38,818 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 19:28:38,818 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:38,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:38,819 INFO L85 PathProgramCache]: Analyzing trace with hash 484083850, now seen corresponding path program 2 times [2024-09-11 19:28:38,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:38,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779626928] [2024-09-11 19:28:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:38,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:39,006 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 19:28:39,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:39,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779626928] [2024-09-11 19:28:39,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779626928] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:39,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463501984] [2024-09-11 19:28:39,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:28:39,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:39,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:39,009 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 19:28:39,010 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 19:28:39,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:28:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:39,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-11 19:28:39,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-11 19:28:39,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-11 19:28:39,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463501984] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:39,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:39,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 23 [2024-09-11 19:28:39,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107550601] [2024-09-11 19:28:39,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:39,280 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 19:28:39,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:39,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 19:28:39,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-09-11 19:28:39,281 INFO L87 Difference]: Start difference. First operand 188 states and 257 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 19:28:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:40,834 INFO L93 Difference]: Finished difference Result 675 states and 993 transitions. [2024-09-11 19:28:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-11 19:28:40,835 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 24 [2024-09-11 19:28:40,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:40,837 INFO L225 Difference]: With dead ends: 675 [2024-09-11 19:28:40,837 INFO L226 Difference]: Without dead ends: 579 [2024-09-11 19:28:40,839 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=912, Invalid=3644, Unknown=0, NotChecked=0, Total=4556 [2024-09-11 19:28:40,840 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 216 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:40,840 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 170 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:28:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2024-09-11 19:28:40,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 219. [2024-09-11 19:28:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.3623853211009174) internal successors, (297), 218 states have internal predecessors, (297), 0 states have call successors, (0), 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 19:28:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 297 transitions. [2024-09-11 19:28:40,914 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 297 transitions. Word has length 24 [2024-09-11 19:28:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:40,915 INFO L474 AbstractCegarLoop]: Abstraction has 219 states and 297 transitions. [2024-09-11 19:28:40,915 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 19:28:40,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 297 transitions. [2024-09-11 19:28:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-11 19:28:40,916 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:40,916 INFO L216 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:40,930 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-11 19:28:41,119 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 19:28:41,120 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:41,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:41,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1674599493, now seen corresponding path program 2 times [2024-09-11 19:28:41,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:41,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884414674] [2024-09-11 19:28:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:41,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:41,291 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 19:28:41,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:41,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884414674] [2024-09-11 19:28:41,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884414674] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:41,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997891390] [2024-09-11 19:28:41,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:28:41,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:41,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:41,294 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 19:28:41,296 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 19:28:41,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:28:41,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:41,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-11 19:28:41,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:28:41,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-11 19:28:41,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997891390] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:41,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:41,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 15 [2024-09-11 19:28:41,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024032318] [2024-09-11 19:28:41,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:41,433 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:28:41,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:41,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:28:41,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:28:41,434 INFO L87 Difference]: Start difference. First operand 219 states and 297 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 19:28:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:41,820 INFO L93 Difference]: Finished difference Result 507 states and 748 transitions. [2024-09-11 19:28:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 19:28:41,821 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 25 [2024-09-11 19:28:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:41,823 INFO L225 Difference]: With dead ends: 507 [2024-09-11 19:28:41,823 INFO L226 Difference]: Without dead ends: 444 [2024-09-11 19:28:41,823 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2024-09-11 19:28:41,824 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 90 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:41,824 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 287 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:28:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2024-09-11 19:28:41,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 275. [2024-09-11 19:28:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.364963503649635) internal successors, (374), 274 states have internal predecessors, (374), 0 states have call successors, (0), 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 19:28:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 374 transitions. [2024-09-11 19:28:41,908 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 374 transitions. Word has length 25 [2024-09-11 19:28:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:41,909 INFO L474 AbstractCegarLoop]: Abstraction has 275 states and 374 transitions. [2024-09-11 19:28:41,909 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 19:28:41,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 374 transitions. [2024-09-11 19:28:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-11 19:28:41,910 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:41,910 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:41,922 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 19:28:42,112 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 19:28:42,112 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:42,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:42,113 INFO L85 PathProgramCache]: Analyzing trace with hash -257451315, now seen corresponding path program 6 times [2024-09-11 19:28:42,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:42,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324810162] [2024-09-11 19:28:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:42,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-11 19:28:42,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:42,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324810162] [2024-09-11 19:28:42,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324810162] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:42,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46862269] [2024-09-11 19:28:42,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:28:42,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:42,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:42,258 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 19:28:42,259 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 19:28:42,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-11 19:28:42,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:42,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-11 19:28:42,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-11 19:28:42,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:28:42,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46862269] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:42,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:42,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2024-09-11 19:28:42,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434603375] [2024-09-11 19:28:42,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:42,507 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 19:28:42,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:42,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 19:28:42,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:28:42,508 INFO L87 Difference]: Start difference. First operand 275 states and 374 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 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 19:28:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:43,048 INFO L93 Difference]: Finished difference Result 364 states and 490 transitions. [2024-09-11 19:28:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-11 19:28:43,049 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 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 19:28:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:43,051 INFO L225 Difference]: With dead ends: 364 [2024-09-11 19:28:43,051 INFO L226 Difference]: Without dead ends: 298 [2024-09-11 19:28:43,052 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 19:28:43,052 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 53 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:43,053 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 323 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:28:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-09-11 19:28:43,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 259. [2024-09-11 19:28:43,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.3682170542635659) internal successors, (353), 258 states have internal predecessors, (353), 0 states have call successors, (0), 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 19:28:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 353 transitions. [2024-09-11 19:28:43,139 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 353 transitions. Word has length 27 [2024-09-11 19:28:43,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:43,140 INFO L474 AbstractCegarLoop]: Abstraction has 259 states and 353 transitions. [2024-09-11 19:28:43,140 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 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 19:28:43,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 353 transitions. [2024-09-11 19:28:43,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-11 19:28:43,141 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:43,141 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:43,154 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 19:28:43,344 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 19:28:43,344 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:43,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash 228281801, now seen corresponding path program 7 times [2024-09-11 19:28:43,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:43,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518462020] [2024-09-11 19:28:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:43,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:28:43,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:43,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518462020] [2024-09-11 19:28:43,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518462020] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:43,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11798359] [2024-09-11 19:28:43,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:28:43,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:43,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:43,574 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 19:28:43,575 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 19:28:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:43,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 19:28:43,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-11 19:28:43,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-11 19:28:43,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11798359] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:43,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:43,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 27 [2024-09-11 19:28:43,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475930425] [2024-09-11 19:28:43,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:43,853 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 19:28:43,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:43,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 19:28:43,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-09-11 19:28:43,854 INFO L87 Difference]: Start difference. First operand 259 states and 353 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 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 19:28:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:45,175 INFO L93 Difference]: Finished difference Result 590 states and 908 transitions. [2024-09-11 19:28:45,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-09-11 19:28:45,175 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 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 19:28:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:45,177 INFO L225 Difference]: With dead ends: 590 [2024-09-11 19:28:45,177 INFO L226 Difference]: Without dead ends: 509 [2024-09-11 19:28:45,178 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=941, Invalid=3751, Unknown=0, NotChecked=0, Total=4692 [2024-09-11 19:28:45,178 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 160 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:45,179 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 294 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 19:28:45,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2024-09-11 19:28:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 353. [2024-09-11 19:28:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.3607954545454546) internal successors, (479), 352 states have internal predecessors, (479), 0 states have call successors, (0), 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 19:28:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 479 transitions. [2024-09-11 19:28:45,323 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 479 transitions. Word has length 28 [2024-09-11 19:28:45,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:45,323 INFO L474 AbstractCegarLoop]: Abstraction has 353 states and 479 transitions. [2024-09-11 19:28:45,324 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 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 19:28:45,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 479 transitions. [2024-09-11 19:28:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-11 19:28:45,325 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:45,325 INFO L216 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:45,338 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 19:28:45,525 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 19:28:45,525 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:45,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:45,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1518139608, now seen corresponding path program 3 times [2024-09-11 19:28:45,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:45,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291441547] [2024-09-11 19:28:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:45,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:28:45,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:45,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291441547] [2024-09-11 19:28:45,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291441547] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:45,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091223035] [2024-09-11 19:28:45,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:28:45,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:45,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:45,716 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 19:28:45,717 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 19:28:45,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:28:45,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:45,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 19:28:45,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-11 19:28:45,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-11 19:28:45,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091223035] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:45,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:45,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 23 [2024-09-11 19:28:45,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401286177] [2024-09-11 19:28:45,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:45,982 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 19:28:45,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:45,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 19:28:45,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-09-11 19:28:45,983 INFO L87 Difference]: Start difference. First operand 353 states and 479 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 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 19:28:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:46,802 INFO L93 Difference]: Finished difference Result 687 states and 980 transitions. [2024-09-11 19:28:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-11 19:28:46,803 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 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 19:28:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:46,805 INFO L225 Difference]: With dead ends: 687 [2024-09-11 19:28:46,805 INFO L226 Difference]: Without dead ends: 545 [2024-09-11 19:28:46,806 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2024-09-11 19:28:46,807 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 229 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:46,808 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 335 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:28:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2024-09-11 19:28:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 396. [2024-09-11 19:28:46,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.3620253164556961) internal successors, (538), 395 states have internal predecessors, (538), 0 states have call successors, (0), 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 19:28:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 538 transitions. [2024-09-11 19:28:46,963 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 538 transitions. Word has length 28 [2024-09-11 19:28:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:46,963 INFO L474 AbstractCegarLoop]: Abstraction has 396 states and 538 transitions. [2024-09-11 19:28:46,963 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 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 19:28:46,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:46,964 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 538 transitions. [2024-09-11 19:28:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-11 19:28:46,964 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:46,964 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:46,981 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 19:28:47,165 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 19:28:47,165 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:47,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:47,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1866772422, now seen corresponding path program 3 times [2024-09-11 19:28:47,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:47,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236659524] [2024-09-11 19:28:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:47,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:28:47,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:47,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236659524] [2024-09-11 19:28:47,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236659524] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:47,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529460917] [2024-09-11 19:28:47,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:28:47,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:47,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:47,382 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 19:28:47,384 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 19:28:47,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:28:47,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:47,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-11 19:28:47,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:28:47,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:28:47,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529460917] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:47,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:47,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-09-11 19:28:47,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31955735] [2024-09-11 19:28:47,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:47,616 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 19:28:47,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:47,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 19:28:47,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:28:47,617 INFO L87 Difference]: Start difference. First operand 396 states and 538 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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 19:28:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:48,005 INFO L93 Difference]: Finished difference Result 543 states and 725 transitions. [2024-09-11 19:28:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:28:48,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-09-11 19:28:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:48,009 INFO L225 Difference]: With dead ends: 543 [2024-09-11 19:28:48,009 INFO L226 Difference]: Without dead ends: 518 [2024-09-11 19:28:48,009 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 20 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:28:48,010 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:48,010 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 78 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:28:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2024-09-11 19:28:48,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 403. [2024-09-11 19:28:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.3880597014925373) internal successors, (558), 402 states have internal predecessors, (558), 0 states have call successors, (0), 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 19:28:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 558 transitions. [2024-09-11 19:28:48,174 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 558 transitions. Word has length 29 [2024-09-11 19:28:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:48,174 INFO L474 AbstractCegarLoop]: Abstraction has 403 states and 558 transitions. [2024-09-11 19:28:48,174 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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 19:28:48,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 558 transitions. [2024-09-11 19:28:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-11 19:28:48,175 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:48,175 INFO L216 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:48,190 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 19:28:48,379 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 19:28:48,380 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:48,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:48,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2144765827, now seen corresponding path program 4 times [2024-09-11 19:28:48,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:48,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388897437] [2024-09-11 19:28:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:48,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 19:28:48,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:48,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388897437] [2024-09-11 19:28:48,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388897437] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:48,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267306958] [2024-09-11 19:28:48,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:28:48,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:48,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:48,591 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 19:28:48,593 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 19:28:48,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:28:48,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:48,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-11 19:28:48,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:28:48,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-11 19:28:48,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267306958] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:48,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:48,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 6] total 19 [2024-09-11 19:28:48,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308877355] [2024-09-11 19:28:48,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:48,778 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-11 19:28:48,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-11 19:28:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-09-11 19:28:48,779 INFO L87 Difference]: Start difference. First operand 403 states and 558 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:49,568 INFO L93 Difference]: Finished difference Result 877 states and 1275 transitions. [2024-09-11 19:28:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-11 19:28:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-09-11 19:28:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:49,574 INFO L225 Difference]: With dead ends: 877 [2024-09-11 19:28:49,574 INFO L226 Difference]: Without dead ends: 741 [2024-09-11 19:28:49,575 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2024-09-11 19:28:49,575 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 224 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:49,575 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 399 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:28:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2024-09-11 19:28:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 470. [2024-09-11 19:28:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.3667377398720681) internal successors, (641), 469 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 19:28:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 641 transitions. [2024-09-11 19:28:49,774 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 641 transitions. Word has length 31 [2024-09-11 19:28:49,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:49,774 INFO L474 AbstractCegarLoop]: Abstraction has 470 states and 641 transitions. [2024-09-11 19:28:49,774 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:49,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 641 transitions. [2024-09-11 19:28:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-11 19:28:49,776 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:49,776 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:49,789 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 19:28:49,980 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 19:28:49,980 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:49,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:49,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2125166439, now seen corresponding path program 4 times [2024-09-11 19:28:49,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:49,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045021752] [2024-09-11 19:28:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:49,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-11 19:28:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045021752] [2024-09-11 19:28:50,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045021752] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28591972] [2024-09-11 19:28:50,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:28:50,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:50,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:50,167 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 19:28:50,168 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 19:28:50,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:28:50,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:50,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-11 19:28:50,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 19:28:50,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 19:28:50,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28591972] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:50,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:50,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2024-09-11 19:28:50,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050878736] [2024-09-11 19:28:50,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:50,493 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:28:50,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:50,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:28:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:28:50,494 INFO L87 Difference]: Start difference. First operand 470 states and 641 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 19:28:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:54,751 INFO L93 Difference]: Finished difference Result 1079 states and 1427 transitions. [2024-09-11 19:28:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2024-09-11 19:28:54,752 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 32 [2024-09-11 19:28:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:54,756 INFO L225 Difference]: With dead ends: 1079 [2024-09-11 19:28:54,756 INFO L226 Difference]: Without dead ends: 961 [2024-09-11 19:28:54,761 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8816 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1591, Invalid=21971, Unknown=0, NotChecked=0, Total=23562 [2024-09-11 19:28:54,762 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 248 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:54,762 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 339 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 19:28:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2024-09-11 19:28:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 503. [2024-09-11 19:28:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.3545816733067728) internal successors, (680), 502 states have internal predecessors, (680), 0 states have call successors, (0), 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 19:28:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 680 transitions. [2024-09-11 19:28:55,027 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 680 transitions. Word has length 32 [2024-09-11 19:28:55,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:55,028 INFO L474 AbstractCegarLoop]: Abstraction has 503 states and 680 transitions. [2024-09-11 19:28:55,028 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 19:28:55,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 680 transitions. [2024-09-11 19:28:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-11 19:28:55,029 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:55,029 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:55,041 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 19:28:55,229 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 19:28:55,229 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:55,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:55,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2109679771, now seen corresponding path program 5 times [2024-09-11 19:28:55,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:55,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76207803] [2024-09-11 19:28:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:55,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:28:55,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:55,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76207803] [2024-09-11 19:28:55,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76207803] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:55,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745376150] [2024-09-11 19:28:55,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:28:55,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:55,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:55,515 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 19:28:55,516 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 19:28:55,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-11 19:28:55,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:55,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-11 19:28:55,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:28:55,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-11 19:28:56,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745376150] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:56,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:56,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 15] total 39 [2024-09-11 19:28:56,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559978902] [2024-09-11 19:28:56,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:56,121 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-11 19:28:56,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:56,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-11 19:28:56,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2024-09-11 19:28:56,122 INFO L87 Difference]: Start difference. First operand 503 states and 680 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 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 19:28:58,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:58,169 INFO L93 Difference]: Finished difference Result 822 states and 1163 transitions. [2024-09-11 19:28:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-09-11 19:28:58,169 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 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 33 [2024-09-11 19:28:58,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:58,172 INFO L225 Difference]: With dead ends: 822 [2024-09-11 19:28:58,172 INFO L226 Difference]: Without dead ends: 720 [2024-09-11 19:28:58,174 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1960, Invalid=6970, Unknown=0, NotChecked=0, Total=8930 [2024-09-11 19:28:58,175 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 174 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:58,175 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 352 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1804 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-11 19:28:58,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2024-09-11 19:28:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 558. [2024-09-11 19:28:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.3482944344703771) internal successors, (751), 557 states have internal predecessors, (751), 0 states have call successors, (0), 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 19:28:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 751 transitions. [2024-09-11 19:28:58,477 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 751 transitions. Word has length 33 [2024-09-11 19:28:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:58,477 INFO L474 AbstractCegarLoop]: Abstraction has 558 states and 751 transitions. [2024-09-11 19:28:58,477 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 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 19:28:58,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 751 transitions. [2024-09-11 19:28:58,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-11 19:28:58,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:58,479 INFO L216 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:58,494 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 19:28:58,683 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 19:28:58,683 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:58,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:58,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1878232294, now seen corresponding path program 6 times [2024-09-11 19:28:58,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:58,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449586289] [2024-09-11 19:28:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:58,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 19:28:58,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:58,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449586289] [2024-09-11 19:28:58,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449586289] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:58,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092752850] [2024-09-11 19:28:58,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:28:58,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:58,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:58,900 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 19:28:58,902 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 19:28:58,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-11 19:28:58,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:58,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-11 19:28:58,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:28:59,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-11 19:28:59,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092752850] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:59,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:59,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 6] total 25 [2024-09-11 19:28:59,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242938992] [2024-09-11 19:28:59,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:59,172 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-11 19:28:59,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-11 19:28:59,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2024-09-11 19:28:59,173 INFO L87 Difference]: Start difference. First operand 558 states and 751 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 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 19:29:00,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:00,515 INFO L93 Difference]: Finished difference Result 1213 states and 1720 transitions. [2024-09-11 19:29:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-11 19:29:00,516 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 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 33 [2024-09-11 19:29:00,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:00,519 INFO L225 Difference]: With dead ends: 1213 [2024-09-11 19:29:00,519 INFO L226 Difference]: Without dead ends: 985 [2024-09-11 19:29:00,520 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1705, Unknown=0, NotChecked=0, Total=2162 [2024-09-11 19:29:00,521 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 222 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:00,521 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 659 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 19:29:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2024-09-11 19:29:00,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 615. [2024-09-11 19:29:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 1.3713355048859934) internal successors, (842), 614 states have internal predecessors, (842), 0 states have call successors, (0), 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 19:29:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 842 transitions. [2024-09-11 19:29:00,986 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 842 transitions. Word has length 33 [2024-09-11 19:29:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:00,986 INFO L474 AbstractCegarLoop]: Abstraction has 615 states and 842 transitions. [2024-09-11 19:29:00,986 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 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 19:29:00,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 842 transitions. [2024-09-11 19:29:00,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-11 19:29:00,988 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:00,988 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:01,002 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 19:29:01,192 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 19:29:01,193 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:01,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:01,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1251258075, now seen corresponding path program 7 times [2024-09-11 19:29:01,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:01,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960110289] [2024-09-11 19:29:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:01,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-11 19:29:01,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:01,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960110289] [2024-09-11 19:29:01,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960110289] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:01,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281783719] [2024-09-11 19:29:01,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:29:01,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:01,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:01,459 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 19:29:01,461 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 19:29:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:01,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-11 19:29:01,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 19:29:01,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 19:29:01,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281783719] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:01,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:01,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-11 19:29:01,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243440663] [2024-09-11 19:29:01,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:01,637 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:29:01,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:01,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:29:01,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:29:01,637 INFO L87 Difference]: Start difference. First operand 615 states and 842 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 19:29:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:02,383 INFO L93 Difference]: Finished difference Result 847 states and 1118 transitions. [2024-09-11 19:29:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 19:29:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 19:29:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:02,387 INFO L225 Difference]: With dead ends: 847 [2024-09-11 19:29:02,387 INFO L226 Difference]: Without dead ends: 817 [2024-09-11 19:29:02,387 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 15 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:29:02,387 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:02,388 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 124 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:29:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2024-09-11 19:29:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 627. [2024-09-11 19:29:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 1.376996805111821) internal successors, (862), 626 states have internal predecessors, (862), 0 states have call successors, (0), 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 19:29:02,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 862 transitions. [2024-09-11 19:29:02,755 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 862 transitions. Word has length 35 [2024-09-11 19:29:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:02,755 INFO L474 AbstractCegarLoop]: Abstraction has 627 states and 862 transitions. [2024-09-11 19:29:02,755 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 19:29:02,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 862 transitions. [2024-09-11 19:29:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-11 19:29:02,756 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:02,756 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:02,767 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-11 19:29:02,956 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 19:29:02,957 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:02,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:02,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1234771652, now seen corresponding path program 8 times [2024-09-11 19:29:02,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:02,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895221953] [2024-09-11 19:29:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:02,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-11 19:29:03,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:03,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895221953] [2024-09-11 19:29:03,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895221953] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:03,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894918922] [2024-09-11 19:29:03,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:29:03,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:03,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:03,239 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 19:29:03,240 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 19:29:03,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:29:03,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:03,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-11 19:29:03,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-11 19:29:03,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-11 19:29:03,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894918922] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:03,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:03,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2024-09-11 19:29:03,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502896867] [2024-09-11 19:29:03,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:03,465 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 19:29:03,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:03,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 19:29:03,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-09-11 19:29:03,466 INFO L87 Difference]: Start difference. First operand 627 states and 862 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 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 19:29:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:05,008 INFO L93 Difference]: Finished difference Result 1272 states and 1696 transitions. [2024-09-11 19:29:05,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-11 19:29:05,008 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 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 19:29:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:05,013 INFO L225 Difference]: With dead ends: 1272 [2024-09-11 19:29:05,013 INFO L226 Difference]: Without dead ends: 1177 [2024-09-11 19:29:05,013 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2024-09-11 19:29:05,013 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 97 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:05,014 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 160 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:29:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2024-09-11 19:29:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 751. [2024-09-11 19:29:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 1.3453333333333333) internal successors, (1009), 750 states have internal predecessors, (1009), 0 states have call successors, (0), 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 19:29:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1009 transitions. [2024-09-11 19:29:05,470 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1009 transitions. Word has length 35 [2024-09-11 19:29:05,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:05,471 INFO L474 AbstractCegarLoop]: Abstraction has 751 states and 1009 transitions. [2024-09-11 19:29:05,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 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 19:29:05,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:05,471 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1009 transitions. [2024-09-11 19:29:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-11 19:29:05,473 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:05,473 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:05,489 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-11 19:29:05,676 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 19:29:05,677 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:05,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:05,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1594804439, now seen corresponding path program 9 times [2024-09-11 19:29:05,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:05,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684712514] [2024-09-11 19:29:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:05,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:29:05,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:05,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684712514] [2024-09-11 19:29:05,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684712514] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:05,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375604071] [2024-09-11 19:29:05,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:29:05,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:05,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:05,984 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 19:29:05,984 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 19:29:06,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-11 19:29:06,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:06,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-11 19:29:06,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-11 19:29:06,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-11 19:29:06,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375604071] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:06,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:06,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2024-09-11 19:29:06,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488208342] [2024-09-11 19:29:06,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:06,703 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 19:29:06,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:06,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 19:29:06,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=648, Unknown=0, NotChecked=0, Total=702 [2024-09-11 19:29:06,704 INFO L87 Difference]: Start difference. First operand 751 states and 1009 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 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 19:29:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:17,831 INFO L93 Difference]: Finished difference Result 1574 states and 2080 transitions. [2024-09-11 19:29:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2024-09-11 19:29:17,831 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 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 36 [2024-09-11 19:29:17,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:17,835 INFO L225 Difference]: With dead ends: 1574 [2024-09-11 19:29:17,835 INFO L226 Difference]: Without dead ends: 1409 [2024-09-11 19:29:17,842 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 61 SyntacticMatches, 14 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36482 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=4735, Invalid=81995, Unknown=0, NotChecked=0, Total=86730 [2024-09-11 19:29:17,842 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 404 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 3896 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 4429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 3896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:17,842 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 263 Invalid, 4429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 3896 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-11 19:29:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2024-09-11 19:29:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 675. [2024-09-11 19:29:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 1.3412462908011868) internal successors, (904), 674 states have internal predecessors, (904), 0 states have call successors, (0), 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 19:29:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 904 transitions. [2024-09-11 19:29:18,385 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 904 transitions. Word has length 36 [2024-09-11 19:29:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:18,385 INFO L474 AbstractCegarLoop]: Abstraction has 675 states and 904 transitions. [2024-09-11 19:29:18,385 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 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 19:29:18,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 904 transitions. [2024-09-11 19:29:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-11 19:29:18,387 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:18,387 INFO L216 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:18,402 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 19:29:18,591 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 19:29:18,592 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:18,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash -872542230, now seen corresponding path program 10 times [2024-09-11 19:29:18,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:18,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188204278] [2024-09-11 19:29:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:18,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-11 19:29:18,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:18,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188204278] [2024-09-11 19:29:18,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188204278] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:18,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705966734] [2024-09-11 19:29:18,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:29:18,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:18,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:18,841 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 19:29:18,842 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 19:29:18,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:29:18,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:18,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-11 19:29:18,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-11 19:29:18,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-11 19:29:19,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705966734] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:19,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:19,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 10] total 29 [2024-09-11 19:29:19,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030318823] [2024-09-11 19:29:19,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:19,174 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-11 19:29:19,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:19,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-11 19:29:19,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2024-09-11 19:29:19,175 INFO L87 Difference]: Start difference. First operand 675 states and 904 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 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 19:29:21,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:21,363 INFO L93 Difference]: Finished difference Result 1254 states and 1750 transitions. [2024-09-11 19:29:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-09-11 19:29:21,364 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 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 37 [2024-09-11 19:29:21,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:21,366 INFO L225 Difference]: With dead ends: 1254 [2024-09-11 19:29:21,366 INFO L226 Difference]: Without dead ends: 814 [2024-09-11 19:29:21,367 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=542, Invalid=5310, Unknown=0, NotChecked=0, Total=5852 [2024-09-11 19:29:21,368 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 116 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:21,368 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 769 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 19:29:21,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2024-09-11 19:29:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 663. [2024-09-11 19:29:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.350453172205438) internal successors, (894), 662 states have internal predecessors, (894), 0 states have call successors, (0), 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 19:29:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 894 transitions. [2024-09-11 19:29:21,813 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 894 transitions. Word has length 37 [2024-09-11 19:29:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:21,813 INFO L474 AbstractCegarLoop]: Abstraction has 663 states and 894 transitions. [2024-09-11 19:29:21,813 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 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 19:29:21,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 894 transitions. [2024-09-11 19:29:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-11 19:29:21,814 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:21,814 INFO L216 NwaCegarLoop]: trace histogram [10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:21,830 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 19:29:22,015 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 19:29:22,015 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:22,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:22,016 INFO L85 PathProgramCache]: Analyzing trace with hash 479264330, now seen corresponding path program 3 times [2024-09-11 19:29:22,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:22,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579845887] [2024-09-11 19:29:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:22,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-11 19:29:22,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:22,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579845887] [2024-09-11 19:29:22,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579845887] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:22,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694903097] [2024-09-11 19:29:22,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:29:22,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:22,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:22,278 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 19:29:22,279 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 19:29:22,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-11 19:29:22,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:22,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-11 19:29:22,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-11 19:29:22,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-11 19:29:22,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694903097] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:22,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:22,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 38 [2024-09-11 19:29:22,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373544809] [2024-09-11 19:29:22,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:22,784 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-11 19:29:22,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:22,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-11 19:29:22,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 19:29:22,785 INFO L87 Difference]: Start difference. First operand 663 states and 894 transitions. Second operand has 38 states, 38 states have (on average 1.631578947368421) internal successors, (62), 38 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:27,561 INFO L93 Difference]: Finished difference Result 1521 states and 2268 transitions. [2024-09-11 19:29:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2024-09-11 19:29:27,562 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.631578947368421) internal successors, (62), 38 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-09-11 19:29:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:27,566 INFO L225 Difference]: With dead ends: 1521 [2024-09-11 19:29:27,566 INFO L226 Difference]: Without dead ends: 1393 [2024-09-11 19:29:27,567 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5330 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3314, Invalid=14776, Unknown=0, NotChecked=0, Total=18090 [2024-09-11 19:29:27,568 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 509 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 4074 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 4482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 4074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:27,568 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 865 Invalid, 4482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 4074 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-11 19:29:27,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2024-09-11 19:29:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 794. [2024-09-11 19:29:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 1.3593947036569987) internal successors, (1078), 793 states have internal predecessors, (1078), 0 states have call successors, (0), 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 19:29:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1078 transitions. [2024-09-11 19:29:28,156 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1078 transitions. Word has length 38 [2024-09-11 19:29:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:28,157 INFO L474 AbstractCegarLoop]: Abstraction has 794 states and 1078 transitions. [2024-09-11 19:29:28,157 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.631578947368421) internal successors, (62), 38 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:28,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1078 transitions. [2024-09-11 19:29:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-11 19:29:28,158 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:28,158 INFO L216 NwaCegarLoop]: trace histogram [11, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:28,171 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-11 19:29:28,359 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 19:29:28,359 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:28,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:28,359 INFO L85 PathProgramCache]: Analyzing trace with hash 69299768, now seen corresponding path program 11 times [2024-09-11 19:29:28,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:28,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455118972] [2024-09-11 19:29:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:28,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-11 19:29:28,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:28,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455118972] [2024-09-11 19:29:28,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455118972] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:28,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923314213] [2024-09-11 19:29:28,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:29:28,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:28,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:28,639 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 19:29:28,641 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 19:29:28,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-11 19:29:28,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:28,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-11 19:29:28,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 19:29:28,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-11 19:29:29,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923314213] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:29,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:29,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 13] total 38 [2024-09-11 19:29:29,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912011886] [2024-09-11 19:29:29,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:29,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-11 19:29:29,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:29,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-11 19:29:29,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 19:29:29,283 INFO L87 Difference]: Start difference. First operand 794 states and 1078 transitions. Second operand has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 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 19:29:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:31,888 INFO L93 Difference]: Finished difference Result 1595 states and 2231 transitions. [2024-09-11 19:29:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-09-11 19:29:31,888 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 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 38 [2024-09-11 19:29:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:31,892 INFO L225 Difference]: With dead ends: 1595 [2024-09-11 19:29:31,892 INFO L226 Difference]: Without dead ends: 1133 [2024-09-11 19:29:31,893 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1156, Invalid=5650, Unknown=0, NotChecked=0, Total=6806 [2024-09-11 19:29:31,893 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 315 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 2034 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:31,893 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 817 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2034 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-11 19:29:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2024-09-11 19:29:32,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 825. [2024-09-11 19:29:32,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 1.3470873786407767) internal successors, (1110), 824 states have internal predecessors, (1110), 0 states have call successors, (0), 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 19:29:32,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1110 transitions. [2024-09-11 19:29:32,531 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1110 transitions. Word has length 38 [2024-09-11 19:29:32,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:32,531 INFO L474 AbstractCegarLoop]: Abstraction has 825 states and 1110 transitions. [2024-09-11 19:29:32,531 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 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 19:29:32,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1110 transitions. [2024-09-11 19:29:32,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-11 19:29:32,533 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:32,533 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:32,548 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 19:29:32,734 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 19:29:32,734 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:32,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:32,734 INFO L85 PathProgramCache]: Analyzing trace with hash -431456614, now seen corresponding path program 12 times [2024-09-11 19:29:32,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:32,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906219995] [2024-09-11 19:29:32,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:32,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-11 19:29:33,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:33,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906219995] [2024-09-11 19:29:33,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906219995] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:33,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930802357] [2024-09-11 19:29:33,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:29:33,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:33,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:33,023 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 19:29:33,024 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 19:29:33,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-11 19:29:33,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:33,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-11 19:29:33,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-11 19:29:33,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-11 19:29:33,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930802357] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:33,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:33,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2024-09-11 19:29:33,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564347684] [2024-09-11 19:29:33,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:33,301 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 19:29:33,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:33,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 19:29:33,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:29:33,301 INFO L87 Difference]: Start difference. First operand 825 states and 1110 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 19:29:34,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:34,748 INFO L93 Difference]: Finished difference Result 1402 states and 1814 transitions. [2024-09-11 19:29:34,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 19:29:34,749 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 41 [2024-09-11 19:29:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:34,754 INFO L225 Difference]: With dead ends: 1402 [2024-09-11 19:29:34,754 INFO L226 Difference]: Without dead ends: 1179 [2024-09-11 19:29:34,754 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 28 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:29:34,755 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:34,755 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:29:34,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2024-09-11 19:29:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 798. [2024-09-11 19:29:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 1.358845671267252) internal successors, (1083), 797 states have internal predecessors, (1083), 0 states have call successors, (0), 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 19:29:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1083 transitions. [2024-09-11 19:29:35,429 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1083 transitions. Word has length 41 [2024-09-11 19:29:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:35,430 INFO L474 AbstractCegarLoop]: Abstraction has 798 states and 1083 transitions. [2024-09-11 19:29:35,430 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 19:29:35,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1083 transitions. [2024-09-11 19:29:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-11 19:29:35,432 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:35,432 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:35,449 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 19:29:35,632 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 19:29:35,632 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:35,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1093480613, now seen corresponding path program 13 times [2024-09-11 19:29:35,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:35,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932752009] [2024-09-11 19:29:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:35,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-11 19:29:35,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:35,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932752009] [2024-09-11 19:29:35,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932752009] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:35,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543248922] [2024-09-11 19:29:35,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:29:35,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:35,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:35,964 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 19:29:35,967 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 19:29:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:36,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-11 19:29:36,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-11 19:29:36,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-11 19:29:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543248922] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:36,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:36,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2024-09-11 19:29:36,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130285384] [2024-09-11 19:29:36,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:36,241 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:29:36,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:36,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:29:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:29:36,243 INFO L87 Difference]: Start difference. First operand 798 states and 1083 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 19:29:40,519 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 19:29:49,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:29:58,398 WARN L539 Checker$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 19:30:02,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:30:11,138 WARN L539 Checker$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 19:30:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:30:11,616 INFO L93 Difference]: Finished difference Result 1854 states and 2411 transitions. [2024-09-11 19:30:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-11 19:30:11,616 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 41 [2024-09-11 19:30:11,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:30:11,621 INFO L225 Difference]: With dead ends: 1854 [2024-09-11 19:30:11,621 INFO L226 Difference]: Without dead ends: 1741 [2024-09-11 19:30:11,622 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=466, Invalid=1787, Unknown=3, NotChecked=0, Total=2256 [2024-09-11 19:30:11,622 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 122 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 145 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:30:11,622 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 207 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 379 Invalid, 5 Unknown, 0 Unchecked, 20.4s Time] [2024-09-11 19:30:11,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2024-09-11 19:30:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 974. [2024-09-11 19:30:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 1.3494347379239466) internal successors, (1313), 973 states have internal predecessors, (1313), 0 states have call successors, (0), 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 19:30:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1313 transitions. [2024-09-11 19:30:12,429 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1313 transitions. Word has length 41 [2024-09-11 19:30:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:30:12,429 INFO L474 AbstractCegarLoop]: Abstraction has 974 states and 1313 transitions. [2024-09-11 19:30:12,429 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 19:30:12,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:30:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1313 transitions. [2024-09-11 19:30:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-11 19:30:12,431 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:30:12,431 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:30:12,442 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 19:30:12,631 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 19:30:12,631 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:30:12,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:30:12,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1153288435, now seen corresponding path program 14 times [2024-09-11 19:30:12,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:30:12,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944228074] [2024-09-11 19:30:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:30:12,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:30:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:30:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-11 19:30:12,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:30:12,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944228074] [2024-09-11 19:30:12,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944228074] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:30:12,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537661825] [2024-09-11 19:30:12,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:30:12,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:30:12,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:30:12,919 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 19:30:12,920 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 19:30:12,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:30:12,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:30:12,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-11 19:30:12,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:30:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-11 19:30:13,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:30:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-11 19:30:13,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537661825] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:30:13,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:30:13,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 30 [2024-09-11 19:30:13,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153546683] [2024-09-11 19:30:13,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:30:13,582 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-11 19:30:13,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:30:13,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-11 19:30:13,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2024-09-11 19:30:13,582 INFO L87 Difference]: Start difference. First operand 974 states and 1313 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 19:30:33,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:30:33,713 INFO L93 Difference]: Finished difference Result 2333 states and 2937 transitions. [2024-09-11 19:30:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 396 states. [2024-09-11 19:30:33,714 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 41 [2024-09-11 19:30:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:30:33,719 INFO L225 Difference]: With dead ends: 2333 [2024-09-11 19:30:33,720 INFO L226 Difference]: Without dead ends: 2196 [2024-09-11 19:30:33,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 67 SyntacticMatches, 16 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71109 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=8168, Invalid=155452, Unknown=0, NotChecked=0, Total=163620 [2024-09-11 19:30:33,729 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 521 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 3466 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 4003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 3466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:30:33,729 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 557 Invalid, 4003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 3466 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-11 19:30:33,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2024-09-11 19:30:34,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 900. [2024-09-11 19:30:34,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 1.347052280311457) internal successors, (1211), 899 states have internal predecessors, (1211), 0 states have call successors, (0), 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 19:30:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1211 transitions. [2024-09-11 19:30:34,656 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1211 transitions. Word has length 41 [2024-09-11 19:30:34,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:30:34,657 INFO L474 AbstractCegarLoop]: Abstraction has 900 states and 1211 transitions. [2024-09-11 19:30:34,657 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 19:30:34,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:30:34,657 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1211 transitions. [2024-09-11 19:30:34,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-11 19:30:34,659 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:30:34,659 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:30:34,675 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 19:30:34,859 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 19:30:34,859 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:30:34,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:30:34,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1993142701, now seen corresponding path program 4 times [2024-09-11 19:30:34,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:30:34,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485749186] [2024-09-11 19:30:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:30:34,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:30:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:30:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-11 19:30:35,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:30:35,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485749186] [2024-09-11 19:30:35,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485749186] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:30:35,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353258662] [2024-09-11 19:30:35,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:30:35,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:30:35,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:30:35,167 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 19:30:35,168 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 19:30:35,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:30:35,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:30:35,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-11 19:30:35,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:30:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-11 19:30:35,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:30:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-11 19:30:35,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353258662] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:30:35,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:30:35,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 43 [2024-09-11 19:30:35,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363491764] [2024-09-11 19:30:35,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:30:35,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-11 19:30:35,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:30:35,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-11 19:30:35,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-09-11 19:30:35,830 INFO L87 Difference]: Start difference. First operand 900 states and 1211 transitions. Second operand has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:32:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:32:19,748 INFO L93 Difference]: Finished difference Result 2900 states and 4088 transitions. [2024-09-11 19:32:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 896 states. [2024-09-11 19:32:19,749 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-09-11 19:32:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:32:19,756 INFO L225 Difference]: With dead ends: 2900 [2024-09-11 19:32:19,756 INFO L226 Difference]: Without dead ends: 2234 [2024-09-11 19:32:19,787 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 895 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402914 ImplicationChecksByTransitivity, 94.6s TimeCoverageRelationStatistics Valid=96057, Invalid=707655, Unknown=0, NotChecked=0, Total=803712 [2024-09-11 19:32:19,788 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 4348 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 3485 mSolverCounterSat, 3453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4348 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 6938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3453 IncrementalHoareTripleChecker+Valid, 3485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:32:19,788 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4348 Valid, 630 Invalid, 6938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3453 Valid, 3485 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-09-11 19:32:19,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2024-09-11 19:32:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1001. [2024-09-11 19:32:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 1.388) internal successors, (1388), 1000 states have internal predecessors, (1388), 0 states have call successors, (0), 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 19:32:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1388 transitions. [2024-09-11 19:32:21,221 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1388 transitions. Word has length 41 [2024-09-11 19:32:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:32:21,221 INFO L474 AbstractCegarLoop]: Abstraction has 1001 states and 1388 transitions. [2024-09-11 19:32:21,221 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:32:21,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:32:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1388 transitions. [2024-09-11 19:32:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-11 19:32:21,223 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:32:21,223 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:32:21,237 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 19:32:21,423 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 19:32:21,424 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:32:21,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:32:21,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1369555815, now seen corresponding path program 5 times [2024-09-11 19:32:21,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:32:21,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536891598] [2024-09-11 19:32:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:32:21,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:32:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:32:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-11 19:32:21,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:32:21,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536891598] [2024-09-11 19:32:21,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536891598] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:32:21,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697012649] [2024-09-11 19:32:21,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:32:21,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:32:21,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:32:21,885 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 19:32:21,886 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 19:32:22,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-11 19:32:22,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:32:22,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-11 19:32:22,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:32:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-11 19:32:22,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:32:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 35 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-09-11 19:32:22,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697012649] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:32:22,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:32:22,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 12] total 42 [2024-09-11 19:32:22,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805957875] [2024-09-11 19:32:22,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:32:22,490 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-11 19:32:22,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:32:22,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-11 19:32:22,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2024-09-11 19:32:22,491 INFO L87 Difference]: Start difference. First operand 1001 states and 1388 transitions. Second operand has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 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 19:32:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:32:26,555 INFO L93 Difference]: Finished difference Result 1861 states and 2688 transitions. [2024-09-11 19:32:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-09-11 19:32:26,555 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 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 42 [2024-09-11 19:32:26,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:32:26,560 INFO L225 Difference]: With dead ends: 1861 [2024-09-11 19:32:26,560 INFO L226 Difference]: Without dead ends: 1492 [2024-09-11 19:32:26,561 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3153 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2029, Invalid=9961, Unknown=0, NotChecked=0, Total=11990 [2024-09-11 19:32:26,562 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 400 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 2973 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 3148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:32:26,562 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 837 Invalid, 3148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2973 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-11 19:32:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2024-09-11 19:32:28,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1126. [2024-09-11 19:32:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1125 states have (on average 1.3884444444444444) internal successors, (1562), 1125 states have internal predecessors, (1562), 0 states have call successors, (0), 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 19:32:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1562 transitions. [2024-09-11 19:32:28,236 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1562 transitions. Word has length 42 [2024-09-11 19:32:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:32:28,237 INFO L474 AbstractCegarLoop]: Abstraction has 1126 states and 1562 transitions. [2024-09-11 19:32:28,237 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 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 19:32:28,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:32:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1562 transitions. [2024-09-11 19:32:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-11 19:32:28,238 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:32:28,238 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:32:28,250 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 19:32:28,438 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 19:32:28,439 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:32:28,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:32:28,439 INFO L85 PathProgramCache]: Analyzing trace with hash 461903291, now seen corresponding path program 6 times [2024-09-11 19:32:28,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:32:28,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425861390] [2024-09-11 19:32:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:32:28,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:32:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:32:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:32:28,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:32:28,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425861390] [2024-09-11 19:32:28,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425861390] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:32:28,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276451948] [2024-09-11 19:32:28,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:32:28,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:32:28,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:32:28,859 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 19:32:28,861 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 19:32:28,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-11 19:32:28,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:32:28,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-11 19:32:28,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:32:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-11 19:32:29,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:32:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-11 19:32:29,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276451948] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:32:29,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:32:29,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 36 [2024-09-11 19:32:29,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801983471] [2024-09-11 19:32:29,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:32:29,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-11 19:32:29,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:32:29,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-11 19:32:29,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1188, Unknown=0, NotChecked=0, Total=1260 [2024-09-11 19:32:29,830 INFO L87 Difference]: Start difference. First operand 1126 states and 1562 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)