./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de42.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd 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-de42.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 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 18:50:38,476 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:50:38,567 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:50:38,572 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:50:38,573 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:50:38,605 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:50:38,608 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:50:38,608 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:50:38,609 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:50:38,610 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:50:38,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:50:38,612 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:50:38,612 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:50:38,612 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:50:38,614 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:50:38,615 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:50:38,615 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:50:38,616 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:50:38,616 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:50:38,616 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:50:38,616 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:50:38,617 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:50:38,620 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:50:38,621 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:50:38,621 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:50:38,622 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:50:38,622 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:50:38,622 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:50:38,622 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:50:38,623 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:50:38,623 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:50:38,623 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:50:38,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:50:38,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:50:38,624 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:50:38,624 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:50:38,625 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:50:38,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:50:38,625 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:50:38,625 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:50:38,625 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:50:38,627 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:50:38,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:50:38,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:50:38,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:50:38,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:50:38,894 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:50:38,894 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:50:38,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de42.c [2024-09-20 18:50:40,333 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:50:40,498 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:50:40,499 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de42.c [2024-09-20 18:50:40,505 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5ed0fb6fe/cc0ef70a38294e1d815ad92f1d7d1919/FLAG949e6a381 [2024-09-20 18:50:40,517 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5ed0fb6fe/cc0ef70a38294e1d815ad92f1d7d1919 [2024-09-20 18:50:40,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:50:40,520 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:50:40,521 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:50:40,521 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:50:40,525 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:50:40,526 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,527 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55031dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40, skipping insertion in model container [2024-09-20 18:50:40,527 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,547 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:50:40,675 WARN L248 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-de42.c[368,381] [2024-09-20 18:50:40,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:50:40,697 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:50:40,706 WARN L248 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-de42.c[368,381] [2024-09-20 18:50:40,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:50:40,726 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:50:40,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40 WrapperNode [2024-09-20 18:50:40,727 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:50:40,727 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:50:40,728 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:50:40,728 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:50:40,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,739 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,744 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:50:40,744 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:50:40,745 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:50:40,745 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:50:40,745 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:50:40,754 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,760 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,772 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]. [2024-09-20 18:50:40,776 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,776 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,779 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,786 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,787 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,788 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,789 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:50:40,790 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:50:40,790 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:50:40,790 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:50:40,791 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (1/1) ... [2024-09-20 18:50:40,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:50:40,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:40,820 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) [2024-09-20 18:50:40,829 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 [2024-09-20 18:50:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:50:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:50:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:50:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:50:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:50:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:50:40,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:50:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:50:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:50:40,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:50:40,945 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:50:40,947 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:50:41,102 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 18:50:41,103 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:50:41,120 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:50:41,120 INFO L318 CfgBuilder]: Removed 4 assume(true) statements. [2024-09-20 18:50:41,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:50:41 BoogieIcfgContainer [2024-09-20 18:50:41,121 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:50:41,124 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:50:41,124 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:50:41,127 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:50:41,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:50:40" (1/3) ... [2024-09-20 18:50:41,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74857982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:50:41, skipping insertion in model container [2024-09-20 18:50:41,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:40" (2/3) ... [2024-09-20 18:50:41,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74857982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:50:41, skipping insertion in model container [2024-09-20 18:50:41,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:50:41" (3/3) ... [2024-09-20 18:50:41,130 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de42.c [2024-09-20 18:50:41,145 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:50:41,146 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:50:41,202 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:50:41,209 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;@69d88fc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:50:41,210 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:50:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:50:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 18:50:41,222 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:41,223 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:41,223 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:41,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:41,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1769832604, now seen corresponding path program 1 times [2024-09-20 18:50:41,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:41,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699965987] [2024-09-20 18:50:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:41,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:41,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:41,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:41,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699965987] [2024-09-20 18:50:41,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699965987] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:50:41,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:50:41,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 18:50:41,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144671147] [2024-09-20 18:50:41,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:50:41,426 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 18:50:41,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 18:50:41,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:50:41,452 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:41,472 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2024-09-20 18:50:41,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 18:50:41,475 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-20 18:50:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:41,481 INFO L225 Difference]: With dead ends: 36 [2024-09-20 18:50:41,481 INFO L226 Difference]: Without dead ends: 15 [2024-09-20 18:50:41,483 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:50:41,487 INFO L434 NwaCegarLoop]: 22 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, 22 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 [2024-09-20 18:50:41,488 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:41,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-20 18:50:41,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-20 18:50:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-09-20 18:50:41,531 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 14 [2024-09-20 18:50:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:41,532 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-09-20 18:50:41,532 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:41,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-09-20 18:50:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 18:50:41,533 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:41,534 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:41,534 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:50:41,534 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:41,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:41,536 INFO L85 PathProgramCache]: Analyzing trace with hash 406021780, now seen corresponding path program 1 times [2024-09-20 18:50:41,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:41,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657041380] [2024-09-20 18:50:41,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:41,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:42,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:42,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:42,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657041380] [2024-09-20 18:50:42,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657041380] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:50:42,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:50:42,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-20 18:50:42,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952714811] [2024-09-20 18:50:42,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:50:42,297 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 18:50:42,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:42,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 18:50:42,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:50:42,300 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:42,435 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2024-09-20 18:50:42,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:50:42,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-20 18:50:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:42,437 INFO L225 Difference]: With dead ends: 31 [2024-09-20 18:50:42,437 INFO L226 Difference]: Without dead ends: 21 [2024-09-20 18:50:42,437 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:50:42,438 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:42,439 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 66 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-20 18:50:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-20 18:50:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2024-09-20 18:50:42,451 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 14 [2024-09-20 18:50:42,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:42,452 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2024-09-20 18:50:42,452 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:42,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2024-09-20 18:50:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-20 18:50:42,455 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:42,455 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:42,455 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 18:50:42,455 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:42,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:42,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1140139470, now seen corresponding path program 1 times [2024-09-20 18:50:42,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:42,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890854143] [2024-09-20 18:50:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:42,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:42,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:42,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:42,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890854143] [2024-09-20 18:50:42,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890854143] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:50:42,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:50:42,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 18:50:42,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248797874] [2024-09-20 18:50:42,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:50:42,528 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 18:50:42,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:42,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 18:50:42,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 18:50:42,530 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:42,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:42,553 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2024-09-20 18:50:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 18:50:42,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-20 18:50:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:42,556 INFO L225 Difference]: With dead ends: 30 [2024-09-20 18:50:42,556 INFO L226 Difference]: Without dead ends: 20 [2024-09-20 18:50:42,556 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 18:50:42,557 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 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 [2024-09-20 18:50:42,557 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-20 18:50:42,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-09-20 18:50:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-09-20 18:50:42,568 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 15 [2024-09-20 18:50:42,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:42,568 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-09-20 18:50:42,568 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:42,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-09-20 18:50:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-20 18:50:42,571 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:42,571 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:42,571 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 18:50:42,572 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:42,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:42,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1678146879, now seen corresponding path program 1 times [2024-09-20 18:50:42,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:42,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894611352] [2024-09-20 18:50:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:42,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:42,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:42,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:42,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894611352] [2024-09-20 18:50:42,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894611352] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:50:42,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:50:42,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 18:50:42,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672439273] [2024-09-20 18:50:42,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:50:42,638 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 18:50:42,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 18:50:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 18:50:42,639 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:42,675 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2024-09-20 18:50:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 18:50:42,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-20 18:50:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:42,677 INFO L225 Difference]: With dead ends: 26 [2024-09-20 18:50:42,677 INFO L226 Difference]: Without dead ends: 16 [2024-09-20 18:50:42,678 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:50:42,679 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:42,679 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:42,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-20 18:50:42,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-20 18:50:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-09-20 18:50:42,686 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 15 [2024-09-20 18:50:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:42,687 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-09-20 18:50:42,688 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:42,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:42,689 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-09-20 18:50:42,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-20 18:50:42,689 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:42,689 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:42,690 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 18:50:42,690 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:42,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:42,690 INFO L85 PathProgramCache]: Analyzing trace with hash 739520928, now seen corresponding path program 1 times [2024-09-20 18:50:42,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:42,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832226834] [2024-09-20 18:50:42,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:42,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:42,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:42,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:42,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832226834] [2024-09-20 18:50:42,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832226834] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:42,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824427275] [2024-09-20 18:50:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:42,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:42,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:42,786 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) [2024-09-20 18:50:42,788 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 18:50:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:42,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 18:50:42,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:42,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:42,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824427275] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:42,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:42,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-20 18:50:42,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576134252] [2024-09-20 18:50:42,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:42,928 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 18:50:42,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:42,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 18:50:42,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:50:42,930 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:43,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:43,058 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2024-09-20 18:50:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 18:50:43,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-20 18:50:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:43,060 INFO L225 Difference]: With dead ends: 40 [2024-09-20 18:50:43,061 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 18:50:43,063 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:50:43,073 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:43,074 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 75 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:43,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 18:50:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2024-09-20 18:50:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2024-09-20 18:50:43,081 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2024-09-20 18:50:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:43,082 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2024-09-20 18:50:43,082 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:43,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2024-09-20 18:50:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 18:50:43,083 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:43,083 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:43,099 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 18:50:43,287 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:43,288 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:43,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:43,289 INFO L85 PathProgramCache]: Analyzing trace with hash 291445903, now seen corresponding path program 1 times [2024-09-20 18:50:43,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:43,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523450829] [2024-09-20 18:50:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:43,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:43,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:43,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:43,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523450829] [2024-09-20 18:50:43,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523450829] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:43,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236486077] [2024-09-20 18:50:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:43,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:43,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:43,384 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) [2024-09-20 18:50:43,386 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 18:50:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:43,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:50:43,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:50:43,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:50:43,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236486077] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:43,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:43,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-20 18:50:43,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078071940] [2024-09-20 18:50:43,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:43,525 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 18:50:43,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 18:50:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-20 18:50:43,526 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:43,589 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2024-09-20 18:50:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:50:43,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-20 18:50:43,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:43,591 INFO L225 Difference]: With dead ends: 62 [2024-09-20 18:50:43,591 INFO L226 Difference]: Without dead ends: 56 [2024-09-20 18:50:43,591 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:50:43,592 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:43,592 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 54 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:43,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-20 18:50:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2024-09-20 18:50:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 71 transitions. [2024-09-20 18:50:43,607 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 71 transitions. Word has length 17 [2024-09-20 18:50:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:43,608 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 71 transitions. [2024-09-20 18:50:43,608 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:43,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 71 transitions. [2024-09-20 18:50:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 18:50:43,609 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:43,609 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:43,626 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 18:50:43,813 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 18:50:43,814 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:43,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash 480426180, now seen corresponding path program 1 times [2024-09-20 18:50:43,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:43,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784333520] [2024-09-20 18:50:43,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:43,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:44,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:44,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:44,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784333520] [2024-09-20 18:50:44,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784333520] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:44,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612786418] [2024-09-20 18:50:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:44,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:44,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:44,173 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) [2024-09-20 18:50:44,175 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 18:50:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:44,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:50:44,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:44,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:44,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612786418] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:44,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:44,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2024-09-20 18:50:44,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974603028] [2024-09-20 18:50:44,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:44,902 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 18:50:44,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:44,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 18:50:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-09-20 18:50:44,903 INFO L87 Difference]: Start difference. First operand 50 states and 71 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:45,312 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2024-09-20 18:50:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:50:45,313 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-20 18:50:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:45,314 INFO L225 Difference]: With dead ends: 63 [2024-09-20 18:50:45,315 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 18:50:45,315 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2024-09-20 18:50:45,316 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:45,316 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 78 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:50:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 18:50:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-09-20 18:50:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 54 transitions. [2024-09-20 18:50:45,329 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 54 transitions. Word has length 18 [2024-09-20 18:50:45,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:45,330 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 54 transitions. [2024-09-20 18:50:45,331 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:45,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 54 transitions. [2024-09-20 18:50:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 18:50:45,335 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:45,335 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:45,354 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 18:50:45,536 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 18:50:45,537 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:45,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:45,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1871956372, now seen corresponding path program 2 times [2024-09-20 18:50:45,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:45,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800736949] [2024-09-20 18:50:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:45,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:45,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:45,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:45,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800736949] [2024-09-20 18:50:45,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800736949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:45,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837333603] [2024-09-20 18:50:45,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:50:45,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:45,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:45,637 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) [2024-09-20 18:50:45,638 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 18:50:45,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:50:45,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:45,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 18:50:45,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:45,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:45,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837333603] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:45,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:45,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-20 18:50:45,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844254301] [2024-09-20 18:50:45,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:45,808 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 18:50:45,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:45,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 18:50:45,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:50:45,809 INFO L87 Difference]: Start difference. First operand 38 states and 54 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:46,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:46,383 INFO L93 Difference]: Finished difference Result 146 states and 250 transitions. [2024-09-20 18:50:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 18:50:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-20 18:50:46,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:46,387 INFO L225 Difference]: With dead ends: 146 [2024-09-20 18:50:46,388 INFO L226 Difference]: Without dead ends: 133 [2024-09-20 18:50:46,389 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2024-09-20 18:50:46,390 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 128 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:46,390 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 118 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:50:46,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-20 18:50:46,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 76. [2024-09-20 18:50:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 71 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 109 transitions. [2024-09-20 18:50:46,425 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 109 transitions. Word has length 18 [2024-09-20 18:50:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:46,426 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 109 transitions. [2024-09-20 18:50:46,426 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:46,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 109 transitions. [2024-09-20 18:50:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 18:50:46,427 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:46,428 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:46,445 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 18:50:46,628 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:46,629 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:46,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:46,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1849964308, now seen corresponding path program 2 times [2024-09-20 18:50:46,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:46,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574045010] [2024-09-20 18:50:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:46,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:46,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:50:46,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:46,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574045010] [2024-09-20 18:50:46,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574045010] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:46,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106374146] [2024-09-20 18:50:46,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:50:46,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:46,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:46,741 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) [2024-09-20 18:50:46,743 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 18:50:46,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:50:46,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:46,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 18:50:46,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:50:46,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:50:46,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106374146] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:46,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:46,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-20 18:50:46,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960326093] [2024-09-20 18:50:46,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:46,893 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 18:50:46,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:46,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 18:50:46,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:50:46,895 INFO L87 Difference]: Start difference. First operand 76 states and 109 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:47,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:47,009 INFO L93 Difference]: Finished difference Result 106 states and 145 transitions. [2024-09-20 18:50:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:50:47,010 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-20 18:50:47,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:47,011 INFO L225 Difference]: With dead ends: 106 [2024-09-20 18:50:47,011 INFO L226 Difference]: Without dead ends: 88 [2024-09-20 18:50:47,012 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:50:47,012 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:47,012 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:47,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-20 18:50:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2024-09-20 18:50:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 67 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2024-09-20 18:50:47,031 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 20 [2024-09-20 18:50:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:47,031 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2024-09-20 18:50:47,032 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:47,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2024-09-20 18:50:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 18:50:47,033 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:47,033 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:47,051 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 18:50:47,237 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:47,238 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:47,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:47,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1048636735, now seen corresponding path program 3 times [2024-09-20 18:50:47,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:47,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207289213] [2024-09-20 18:50:47,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:47,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:47,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:50:47,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:47,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207289213] [2024-09-20 18:50:47,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207289213] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:47,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821029658] [2024-09-20 18:50:47,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:50:47,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:47,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:47,329 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) [2024-09-20 18:50:47,331 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 18:50:47,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-20 18:50:47,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:47,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 18:50:47,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:50:47,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:50:47,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821029658] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:47,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:47,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-20 18:50:47,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300934820] [2024-09-20 18:50:47,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:47,462 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 18:50:47,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 18:50:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:50:47,463 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:47,532 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2024-09-20 18:50:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:50:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-20 18:50:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:47,534 INFO L225 Difference]: With dead ends: 88 [2024-09-20 18:50:47,534 INFO L226 Difference]: Without dead ends: 83 [2024-09-20 18:50:47,534 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:50:47,535 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:47,535 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 58 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-20 18:50:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2024-09-20 18:50:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 75 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 110 transitions. [2024-09-20 18:50:47,567 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 110 transitions. Word has length 21 [2024-09-20 18:50:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:47,567 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 110 transitions. [2024-09-20 18:50:47,567 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:47,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 110 transitions. [2024-09-20 18:50:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 18:50:47,572 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:47,572 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:47,588 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:47,772 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 18:50:47,773 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:47,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:47,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1816461804, now seen corresponding path program 4 times [2024-09-20 18:50:47,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:47,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403504080] [2024-09-20 18:50:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:47,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:48,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:48,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403504080] [2024-09-20 18:50:48,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403504080] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590883131] [2024-09-20 18:50:48,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:50:48,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:48,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:48,219 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) [2024-09-20 18:50:48,221 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 18:50:48,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:50:48,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:48,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 18:50:48,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:48,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:49,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590883131] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:49,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:49,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2024-09-20 18:50:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463764511] [2024-09-20 18:50:49,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:49,197 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 18:50:49,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 18:50:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2024-09-20 18:50:49,199 INFO L87 Difference]: Start difference. First operand 80 states and 110 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:49,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:49,983 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2024-09-20 18:50:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 18:50:49,983 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-20 18:50:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:49,984 INFO L225 Difference]: With dead ends: 100 [2024-09-20 18:50:49,984 INFO L226 Difference]: Without dead ends: 86 [2024-09-20 18:50:49,985 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 18:50:49,985 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:49,986 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 18:50:49,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-20 18:50:50,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2024-09-20 18:50:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 77 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:50,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2024-09-20 18:50:50,012 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 22 [2024-09-20 18:50:50,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:50,013 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2024-09-20 18:50:50,013 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:50,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:50,013 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2024-09-20 18:50:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 18:50:50,014 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:50,014 INFO L216 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:50,032 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 18:50:50,215 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:50,215 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:50,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:50,215 INFO L85 PathProgramCache]: Analyzing trace with hash 924425156, now seen corresponding path program 5 times [2024-09-20 18:50:50,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:50,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286246553] [2024-09-20 18:50:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:50,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:50,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:50:50,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:50,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286246553] [2024-09-20 18:50:50,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286246553] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:50,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731513270] [2024-09-20 18:50:50,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:50:50,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:50,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:50,327 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) [2024-09-20 18:50:50,329 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 18:50:50,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-20 18:50:50,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:50,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 18:50:50,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:50:50,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:50:50,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731513270] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:50,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:50,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-09-20 18:50:50,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650221302] [2024-09-20 18:50:50,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:50,517 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 18:50:50,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 18:50:50,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-09-20 18:50:50,518 INFO L87 Difference]: Start difference. First operand 82 states and 110 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:51,953 INFO L93 Difference]: Finished difference Result 200 states and 302 transitions. [2024-09-20 18:50:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-20 18:50:51,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-20 18:50:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:51,955 INFO L225 Difference]: With dead ends: 200 [2024-09-20 18:50:51,955 INFO L226 Difference]: Without dead ends: 177 [2024-09-20 18:50:51,957 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1061, Invalid=2845, Unknown=0, NotChecked=0, Total=3906 [2024-09-20 18:50:51,957 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 171 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:51,957 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 165 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:50:51,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-20 18:50:51,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 104. [2024-09-20 18:50:51,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.3838383838383839) internal successors, (137), 99 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:51,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 141 transitions. [2024-09-20 18:50:51,991 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 141 transitions. Word has length 22 [2024-09-20 18:50:51,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:51,991 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 141 transitions. [2024-09-20 18:50:51,992 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:51,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:51,992 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 141 transitions. [2024-09-20 18:50:51,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 18:50:51,993 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:51,993 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:52,010 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 18:50:52,197 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:52,198 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:52,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:52,198 INFO L85 PathProgramCache]: Analyzing trace with hash -440203297, now seen corresponding path program 6 times [2024-09-20 18:50:52,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:52,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488982984] [2024-09-20 18:50:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:52,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:52,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:52,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:52,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488982984] [2024-09-20 18:50:52,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488982984] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:52,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193921850] [2024-09-20 18:50:52,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:50:52,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:52,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:52,311 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) [2024-09-20 18:50:52,312 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 18:50:52,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-20 18:50:52,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:52,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 18:50:52,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:52,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:52,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193921850] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:52,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:52,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-20 18:50:52,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24404769] [2024-09-20 18:50:52,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:52,418 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 18:50:52,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:52,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 18:50:52,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:50:52,419 INFO L87 Difference]: Start difference. First operand 104 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:52,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:52,473 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2024-09-20 18:50:52,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 18:50:52,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-09-20 18:50:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:52,475 INFO L225 Difference]: With dead ends: 114 [2024-09-20 18:50:52,475 INFO L226 Difference]: Without dead ends: 98 [2024-09-20 18:50:52,475 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:50:52,477 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:52,477 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-20 18:50:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2024-09-20 18:50:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.4065934065934067) internal successors, (128), 91 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 132 transitions. [2024-09-20 18:50:52,517 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 132 transitions. Word has length 23 [2024-09-20 18:50:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:52,517 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 132 transitions. [2024-09-20 18:50:52,517 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:52,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 132 transitions. [2024-09-20 18:50:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 18:50:52,518 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:52,518 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:52,534 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 18:50:52,719 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 18:50:52,719 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:52,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:52,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1071546110, now seen corresponding path program 7 times [2024-09-20 18:50:52,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:52,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322391351] [2024-09-20 18:50:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:52,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:52,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 18:50:52,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:52,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322391351] [2024-09-20 18:50:52,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322391351] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:52,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335996149] [2024-09-20 18:50:52,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:50:52,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:52,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:52,838 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) [2024-09-20 18:50:52,839 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 18:50:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:52,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:50:52,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 18:50:52,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 18:50:53,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335996149] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:53,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:53,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2024-09-20 18:50:53,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608647705] [2024-09-20 18:50:53,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:53,051 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 18:50:53,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:53,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 18:50:53,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-09-20 18:50:53,052 INFO L87 Difference]: Start difference. First operand 96 states and 132 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:53,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:53,264 INFO L93 Difference]: Finished difference Result 132 states and 178 transitions. [2024-09-20 18:50:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 18:50:53,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-20 18:50:53,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:53,266 INFO L225 Difference]: With dead ends: 132 [2024-09-20 18:50:53,266 INFO L226 Difference]: Without dead ends: 114 [2024-09-20 18:50:53,266 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-09-20 18:50:53,267 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:53,267 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 119 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-20 18:50:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2024-09-20 18:50:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.3863636363636365) internal successors, (122), 88 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 126 transitions. [2024-09-20 18:50:53,297 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 126 transitions. Word has length 24 [2024-09-20 18:50:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:53,297 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 126 transitions. [2024-09-20 18:50:53,297 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:53,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:53,298 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 126 transitions. [2024-09-20 18:50:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 18:50:53,298 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:53,298 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:53,316 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:53,502 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 18:50:53,503 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:53,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:53,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1610157924, now seen corresponding path program 8 times [2024-09-20 18:50:53,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:53,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991769900] [2024-09-20 18:50:53,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:53,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:53,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:53,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:53,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991769900] [2024-09-20 18:50:53,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991769900] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:53,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774105212] [2024-09-20 18:50:53,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:50:53,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:53,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:53,673 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) [2024-09-20 18:50:53,675 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 18:50:53,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:50:53,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:53,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 18:50:53,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:50:53,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:50:53,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774105212] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:53,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:53,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 16 [2024-09-20 18:50:53,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428737748] [2024-09-20 18:50:53,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:53,867 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 18:50:53,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:53,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 18:50:53,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2024-09-20 18:50:53,868 INFO L87 Difference]: Start difference. First operand 93 states and 126 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:01,958 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 18:51:10,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:10,155 INFO L93 Difference]: Finished difference Result 194 states and 282 transitions. [2024-09-20 18:51:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 18:51:10,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-20 18:51:10,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:10,156 INFO L225 Difference]: With dead ends: 194 [2024-09-20 18:51:10,157 INFO L226 Difference]: Without dead ends: 188 [2024-09-20 18:51:10,157 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:51:10,158 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:10,158 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 134 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:51:10,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-09-20 18:51:10,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2024-09-20 18:51:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2024-09-20 18:51:10,207 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 24 [2024-09-20 18:51:10,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:10,208 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2024-09-20 18:51:10,208 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:10,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:10,208 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2024-09-20 18:51:10,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 18:51:10,209 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:10,209 INFO L216 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:10,227 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 18:51:10,409 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 18:51:10,409 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:10,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash -37619168, now seen corresponding path program 3 times [2024-09-20 18:51:10,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:10,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224660290] [2024-09-20 18:51:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:10,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:10,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:51:10,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:10,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224660290] [2024-09-20 18:51:10,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224660290] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:10,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369558936] [2024-09-20 18:51:10,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:51:10,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:10,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:10,627 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) [2024-09-20 18:51:10,628 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 18:51:10,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 18:51:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:10,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 18:51:10,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:51:10,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:51:11,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369558936] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:11,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:11,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-09-20 18:51:11,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428324197] [2024-09-20 18:51:11,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:11,072 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 18:51:11,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 18:51:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2024-09-20 18:51:11,073 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:14,664 INFO L93 Difference]: Finished difference Result 602 states and 981 transitions. [2024-09-20 18:51:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-20 18:51:14,664 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-20 18:51:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:14,667 INFO L225 Difference]: With dead ends: 602 [2024-09-20 18:51:14,667 INFO L226 Difference]: Without dead ends: 563 [2024-09-20 18:51:14,669 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1575, Invalid=3537, Unknown=0, NotChecked=0, Total=5112 [2024-09-20 18:51:14,669 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 673 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:14,670 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 376 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 18:51:14,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2024-09-20 18:51:14,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 227. [2024-09-20 18:51:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2024-09-20 18:51:14,753 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 25 [2024-09-20 18:51:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:14,753 INFO L474 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2024-09-20 18:51:14,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:14,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2024-09-20 18:51:14,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 18:51:14,755 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:14,755 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:14,771 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 18:51:14,959 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 18:51:14,959 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:14,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:14,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1984219964, now seen corresponding path program 9 times [2024-09-20 18:51:14,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:14,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023895812] [2024-09-20 18:51:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:14,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:15,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:51:15,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:15,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023895812] [2024-09-20 18:51:15,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023895812] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:15,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002320725] [2024-09-20 18:51:15,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:51:15,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:15,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:15,403 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) [2024-09-20 18:51:15,405 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 18:51:15,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 18:51:15,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:15,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 18:51:15,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:51:15,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:51:16,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002320725] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:16,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:16,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 35 [2024-09-20 18:51:16,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677196587] [2024-09-20 18:51:16,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:16,334 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 18:51:16,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:16,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 18:51:16,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 18:51:16,336 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 33 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:17,297 INFO L93 Difference]: Finished difference Result 262 states and 371 transitions. [2024-09-20 18:51:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 18:51:17,298 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 33 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-20 18:51:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:17,299 INFO L225 Difference]: With dead ends: 262 [2024-09-20 18:51:17,299 INFO L226 Difference]: Without dead ends: 218 [2024-09-20 18:51:17,300 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-09-20 18:51:17,300 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:17,301 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 186 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 18:51:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-20 18:51:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2024-09-20 18:51:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.4834123222748816) internal successors, (313), 211 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 317 transitions. [2024-09-20 18:51:17,404 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 317 transitions. Word has length 26 [2024-09-20 18:51:17,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:17,405 INFO L474 AbstractCegarLoop]: Abstraction has 216 states and 317 transitions. [2024-09-20 18:51:17,405 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 33 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:17,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 317 transitions. [2024-09-20 18:51:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 18:51:17,406 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:17,406 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:17,423 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-20 18:51:17,610 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 18:51:17,611 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:17,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:17,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1102483756, now seen corresponding path program 10 times [2024-09-20 18:51:17,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:17,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641361252] [2024-09-20 18:51:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:17,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:17,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 18:51:17,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:17,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641361252] [2024-09-20 18:51:17,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641361252] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:17,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700668366] [2024-09-20 18:51:17,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:51:17,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:17,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:17,757 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) [2024-09-20 18:51:17,758 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 18:51:17,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:51:17,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:17,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 18:51:17,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 18:51:17,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 18:51:18,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700668366] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:18,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:18,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2024-09-20 18:51:18,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593334045] [2024-09-20 18:51:18,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:18,056 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 18:51:18,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 18:51:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:51:18,057 INFO L87 Difference]: Start difference. First operand 216 states and 317 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:18,429 INFO L93 Difference]: Finished difference Result 307 states and 420 transitions. [2024-09-20 18:51:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 18:51:18,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-20 18:51:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:18,431 INFO L225 Difference]: With dead ends: 307 [2024-09-20 18:51:18,431 INFO L226 Difference]: Without dead ends: 256 [2024-09-20 18:51:18,432 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2024-09-20 18:51:18,432 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:18,433 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 141 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:51:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-09-20 18:51:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 206. [2024-09-20 18:51:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.4527363184079602) internal successors, (292), 201 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 296 transitions. [2024-09-20 18:51:18,502 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 296 transitions. Word has length 28 [2024-09-20 18:51:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:18,502 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 296 transitions. [2024-09-20 18:51:18,502 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:18,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 296 transitions. [2024-09-20 18:51:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 18:51:18,503 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:18,503 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:18,517 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 18:51:18,707 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 18:51:18,708 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:18,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:18,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1450211905, now seen corresponding path program 11 times [2024-09-20 18:51:18,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:18,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344629629] [2024-09-20 18:51:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:18,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:18,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 18:51:18,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:18,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344629629] [2024-09-20 18:51:18,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344629629] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:18,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520336497] [2024-09-20 18:51:18,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:51:18,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:18,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:18,854 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) [2024-09-20 18:51:18,856 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 18:51:18,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-20 18:51:18,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:18,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 18:51:18,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 18:51:18,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 18:51:19,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520336497] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:19,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:19,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-20 18:51:19,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006156370] [2024-09-20 18:51:19,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:19,063 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:51:19,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:51:19,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:51:19,064 INFO L87 Difference]: Start difference. First operand 206 states and 296 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:19,265 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2024-09-20 18:51:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:51:19,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-20 18:51:19,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:19,267 INFO L225 Difference]: With dead ends: 236 [2024-09-20 18:51:19,267 INFO L226 Difference]: Without dead ends: 231 [2024-09-20 18:51:19,267 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:51:19,268 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:19,268 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:51:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-09-20 18:51:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 221. [2024-09-20 18:51:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4259259259259258) internal successors, (308), 216 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 312 transitions. [2024-09-20 18:51:19,350 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 312 transitions. Word has length 29 [2024-09-20 18:51:19,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:19,350 INFO L474 AbstractCegarLoop]: Abstraction has 221 states and 312 transitions. [2024-09-20 18:51:19,350 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:19,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:19,350 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 312 transitions. [2024-09-20 18:51:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 18:51:19,351 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:19,351 INFO L216 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:19,369 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 18:51:19,551 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:19,552 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:19,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:19,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1436244400, now seen corresponding path program 12 times [2024-09-20 18:51:19,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:19,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791862851] [2024-09-20 18:51:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:19,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:19,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:51:19,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:19,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791862851] [2024-09-20 18:51:19,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791862851] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:19,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190197850] [2024-09-20 18:51:19,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:51:19,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:19,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:19,789 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) [2024-09-20 18:51:19,790 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 18:51:19,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 18:51:19,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:19,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 18:51:19,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:51:19,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:51:20,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190197850] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:20,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:20,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-20 18:51:20,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125729104] [2024-09-20 18:51:20,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:20,272 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-20 18:51:20,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-20 18:51:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 18:51:20,273 INFO L87 Difference]: Start difference. First operand 221 states and 312 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:30,158 INFO L93 Difference]: Finished difference Result 703 states and 1080 transitions. [2024-09-20 18:51:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-09-20 18:51:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-20 18:51:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:30,162 INFO L225 Difference]: With dead ends: 703 [2024-09-20 18:51:30,162 INFO L226 Difference]: Without dead ends: 674 [2024-09-20 18:51:30,166 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6639 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=4904, Invalid=12918, Unknown=0, NotChecked=0, Total=17822 [2024-09-20 18:51:30,167 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 893 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:30,167 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 452 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-20 18:51:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2024-09-20 18:51:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 259. [2024-09-20 18:51:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.4448818897637796) internal successors, (367), 254 states have internal predecessors, (367), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 371 transitions. [2024-09-20 18:51:30,294 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 371 transitions. Word has length 29 [2024-09-20 18:51:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:30,294 INFO L474 AbstractCegarLoop]: Abstraction has 259 states and 371 transitions. [2024-09-20 18:51:30,295 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:30,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 371 transitions. [2024-09-20 18:51:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 18:51:30,295 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:30,295 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:30,308 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 18:51:30,496 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:30,496 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:30,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:30,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1971358316, now seen corresponding path program 13 times [2024-09-20 18:51:30,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:30,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39732329] [2024-09-20 18:51:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:30,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:30,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:51:30,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:30,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39732329] [2024-09-20 18:51:30,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39732329] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:30,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631232618] [2024-09-20 18:51:30,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:51:30,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:30,998 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) [2024-09-20 18:51:31,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 18:51:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:31,070 WARN L260 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-20 18:51:31,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:51:31,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:51:33,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631232618] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:33,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:33,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 58 [2024-09-20 18:51:33,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822353872] [2024-09-20 18:51:33,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:33,022 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-20 18:51:33,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-20 18:51:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2024-09-20 18:51:33,023 INFO L87 Difference]: Start difference. First operand 259 states and 371 transitions. Second operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:36,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:36,831 INFO L93 Difference]: Finished difference Result 301 states and 420 transitions. [2024-09-20 18:51:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-20 18:51:36,831 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-20 18:51:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:36,833 INFO L225 Difference]: With dead ends: 301 [2024-09-20 18:51:36,833 INFO L226 Difference]: Without dead ends: 275 [2024-09-20 18:51:36,835 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=776, Invalid=6880, Unknown=0, NotChecked=0, Total=7656 [2024-09-20 18:51:36,835 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 114 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:36,836 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 362 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 18:51:36,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-09-20 18:51:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 265. [2024-09-20 18:51:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.4230769230769231) internal successors, (370), 260 states have internal predecessors, (370), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 374 transitions. [2024-09-20 18:51:36,955 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 374 transitions. Word has length 30 [2024-09-20 18:51:36,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:36,955 INFO L474 AbstractCegarLoop]: Abstraction has 265 states and 374 transitions. [2024-09-20 18:51:36,956 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:36,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 374 transitions. [2024-09-20 18:51:36,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 18:51:36,957 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:36,957 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:36,971 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-20 18:51:37,157 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:37,157 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:37,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1763617342, now seen corresponding path program 14 times [2024-09-20 18:51:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:37,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215032463] [2024-09-20 18:51:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:37,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:37,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 18:51:37,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:37,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215032463] [2024-09-20 18:51:37,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215032463] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:37,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259813387] [2024-09-20 18:51:37,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:51:37,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:37,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:37,342 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) [2024-09-20 18:51:37,344 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 18:51:37,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:51:37,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:37,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-20 18:51:37,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 18:51:37,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 18:51:37,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259813387] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:37,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:37,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 28 [2024-09-20 18:51:37,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539746191] [2024-09-20 18:51:37,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:37,781 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 18:51:37,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:37,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 18:51:37,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2024-09-20 18:51:37,782 INFO L87 Difference]: Start difference. First operand 265 states and 374 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:38,577 INFO L93 Difference]: Finished difference Result 378 states and 503 transitions. [2024-09-20 18:51:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-20 18:51:38,578 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-20 18:51:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:38,580 INFO L225 Difference]: With dead ends: 378 [2024-09-20 18:51:38,580 INFO L226 Difference]: Without dead ends: 305 [2024-09-20 18:51:38,581 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 18:51:38,581 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:38,582 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 230 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:51:38,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-09-20 18:51:38,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 254. [2024-09-20 18:51:38,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.3895582329317269) internal successors, (346), 249 states have internal predecessors, (346), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:38,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 350 transitions. [2024-09-20 18:51:38,702 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 350 transitions. Word has length 32 [2024-09-20 18:51:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:38,702 INFO L474 AbstractCegarLoop]: Abstraction has 254 states and 350 transitions. [2024-09-20 18:51:38,703 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:38,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 350 transitions. [2024-09-20 18:51:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 18:51:38,704 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:38,704 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:38,721 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-20 18:51:38,908 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 18:51:38,909 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:38,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:38,910 INFO L85 PathProgramCache]: Analyzing trace with hash 721021796, now seen corresponding path program 15 times [2024-09-20 18:51:38,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:38,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798579756] [2024-09-20 18:51:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:38,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:39,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 18:51:39,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:39,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798579756] [2024-09-20 18:51:39,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798579756] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:39,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239376034] [2024-09-20 18:51:39,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:51:39,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:39,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:39,178 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) [2024-09-20 18:51:39,179 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 18:51:39,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 18:51:39,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:39,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 18:51:39,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:51:39,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:51:39,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239376034] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:39,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:39,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2024-09-20 18:51:39,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260275233] [2024-09-20 18:51:39,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:39,553 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 18:51:39,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:39,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 18:51:39,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-09-20 18:51:39,554 INFO L87 Difference]: Start difference. First operand 254 states and 350 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:43,836 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 [] [2024-09-20 18:51:51,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:51:59,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:52:00,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:00,069 INFO L93 Difference]: Finished difference Result 321 states and 429 transitions. [2024-09-20 18:52:00,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 18:52:00,070 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-20 18:52:00,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:00,071 INFO L225 Difference]: With dead ends: 321 [2024-09-20 18:52:00,071 INFO L226 Difference]: Without dead ends: 316 [2024-09-20 18:52:00,072 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=228, Invalid=762, Unknown=2, NotChecked=0, Total=992 [2024-09-20 18:52:00,072 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 58 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:00,072 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 167 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 189 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2024-09-20 18:52:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-20 18:52:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 268. [2024-09-20 18:52:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.3802281368821292) internal successors, (363), 263 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 367 transitions. [2024-09-20 18:52:00,212 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 367 transitions. Word has length 32 [2024-09-20 18:52:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:00,212 INFO L474 AbstractCegarLoop]: Abstraction has 268 states and 367 transitions. [2024-09-20 18:52:00,212 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:00,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 367 transitions. [2024-09-20 18:52:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 18:52:00,213 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:00,213 INFO L216 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:00,230 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-20 18:52:00,417 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 18:52:00,418 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:00,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:00,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1819493792, now seen corresponding path program 16 times [2024-09-20 18:52:00,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:00,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175290072] [2024-09-20 18:52:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:00,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:00,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:52:00,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:00,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175290072] [2024-09-20 18:52:00,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175290072] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:00,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476594425] [2024-09-20 18:52:00,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:52:00,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:00,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:00,712 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) [2024-09-20 18:52:00,714 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 18:52:00,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:52:00,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:00,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 18:52:00,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:52:00,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:52:01,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476594425] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:01,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:01,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-20 18:52:01,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879965894] [2024-09-20 18:52:01,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:01,440 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 18:52:01,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 18:52:01,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 18:52:01,441 INFO L87 Difference]: Start difference. First operand 268 states and 367 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:20,647 INFO L93 Difference]: Finished difference Result 859 states and 1231 transitions. [2024-09-20 18:52:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2024-09-20 18:52:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-20 18:52:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:20,651 INFO L225 Difference]: With dead ends: 859 [2024-09-20 18:52:20,651 INFO L226 Difference]: Without dead ends: 818 [2024-09-20 18:52:20,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15077 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=9059, Invalid=28771, Unknown=0, NotChecked=0, Total=37830 [2024-09-20 18:52:20,656 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 1269 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:20,657 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 575 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-20 18:52:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2024-09-20 18:52:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 310. [2024-09-20 18:52:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.4032786885245903) internal successors, (428), 305 states have internal predecessors, (428), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 432 transitions. [2024-09-20 18:52:20,859 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 432 transitions. Word has length 33 [2024-09-20 18:52:20,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:20,859 INFO L474 AbstractCegarLoop]: Abstraction has 310 states and 432 transitions. [2024-09-20 18:52:20,859 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:20,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 432 transitions. [2024-09-20 18:52:20,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 18:52:20,860 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:20,861 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:20,878 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-20 18:52:21,064 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 18:52:21,065 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:21,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1745547068, now seen corresponding path program 17 times [2024-09-20 18:52:21,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:21,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655471571] [2024-09-20 18:52:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:21,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:21,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:52:21,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:21,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655471571] [2024-09-20 18:52:21,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655471571] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:21,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7127883] [2024-09-20 18:52:21,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:52:21,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:21,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:21,784 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) [2024-09-20 18:52:21,786 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 18:52:21,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-20 18:52:21,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:21,886 WARN L260 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-20 18:52:21,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:52:22,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:52:24,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7127883] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:24,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:24,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28, 27] total 70 [2024-09-20 18:52:24,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951886943] [2024-09-20 18:52:24,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:24,750 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-09-20 18:52:24,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:24,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-09-20 18:52:24,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=4315, Unknown=0, NotChecked=0, Total=4830 [2024-09-20 18:52:24,751 INFO L87 Difference]: Start difference. First operand 310 states and 432 transitions. Second operand has 70 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 68 states have internal predecessors, (83), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:28,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:28,010 INFO L93 Difference]: Finished difference Result 355 states and 480 transitions. [2024-09-20 18:52:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 18:52:28,010 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 68 states have internal predecessors, (83), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-20 18:52:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:28,012 INFO L225 Difference]: With dead ends: 355 [2024-09-20 18:52:28,012 INFO L226 Difference]: Without dead ends: 316 [2024-09-20 18:52:28,013 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1195, Invalid=7735, Unknown=0, NotChecked=0, Total=8930 [2024-09-20 18:52:28,013 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 126 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:28,014 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 352 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 18:52:28,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-20 18:52:28,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 306. [2024-09-20 18:52:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.398671096345515) internal successors, (421), 301 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 425 transitions. [2024-09-20 18:52:28,256 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 425 transitions. Word has length 34 [2024-09-20 18:52:28,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:28,256 INFO L474 AbstractCegarLoop]: Abstraction has 306 states and 425 transitions. [2024-09-20 18:52:28,256 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 68 states have internal predecessors, (83), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:28,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 425 transitions. [2024-09-20 18:52:28,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 18:52:28,257 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:28,257 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:28,269 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-20 18:52:28,457 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 18:52:28,458 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:28,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash -746719660, now seen corresponding path program 2 times [2024-09-20 18:52:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:28,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211738319] [2024-09-20 18:52:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:28,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:28,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 18:52:28,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:28,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211738319] [2024-09-20 18:52:28,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211738319] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:28,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153897551] [2024-09-20 18:52:28,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:52:28,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:28,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:28,678 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) [2024-09-20 18:52:28,679 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 18:52:28,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:52:28,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:28,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 18:52:28,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:52:28,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:52:29,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153897551] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:29,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:29,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 34 [2024-09-20 18:52:29,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530441254] [2024-09-20 18:52:29,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:29,182 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-20 18:52:29,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:29,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-20 18:52:29,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 18:52:29,183 INFO L87 Difference]: Start difference. First operand 306 states and 425 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:38,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:38,848 INFO L93 Difference]: Finished difference Result 565 states and 748 transitions. [2024-09-20 18:52:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2024-09-20 18:52:38,850 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-20 18:52:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:38,851 INFO L225 Difference]: With dead ends: 565 [2024-09-20 18:52:38,852 INFO L226 Difference]: Without dead ends: 503 [2024-09-20 18:52:38,853 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9193 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3614, Invalid=24442, Unknown=0, NotChecked=0, Total=28056 [2024-09-20 18:52:38,854 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 431 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:38,854 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 333 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 18:52:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2024-09-20 18:52:39,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 298. [2024-09-20 18:52:39,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.3242320819112627) internal successors, (388), 293 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 392 transitions. [2024-09-20 18:52:39,067 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 392 transitions. Word has length 34 [2024-09-20 18:52:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:39,067 INFO L474 AbstractCegarLoop]: Abstraction has 298 states and 392 transitions. [2024-09-20 18:52:39,067 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:39,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:39,068 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 392 transitions. [2024-09-20 18:52:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 18:52:39,069 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:39,069 INFO L216 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:39,085 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-20 18:52:39,269 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 18:52:39,269 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:39,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:39,270 INFO L85 PathProgramCache]: Analyzing trace with hash 667351476, now seen corresponding path program 18 times [2024-09-20 18:52:39,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:39,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780416652] [2024-09-20 18:52:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:39,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:39,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 18:52:39,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:39,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780416652] [2024-09-20 18:52:39,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780416652] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:39,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895161456] [2024-09-20 18:52:39,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:52:39,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:39,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:39,419 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) [2024-09-20 18:52:39,421 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 18:52:39,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-20 18:52:39,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:39,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:52:39,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 18:52:39,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 18:52:39,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895161456] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:39,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:39,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-20 18:52:39,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477756793] [2024-09-20 18:52:39,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:39,626 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:52:39,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:52:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:52:39,627 INFO L87 Difference]: Start difference. First operand 298 states and 392 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:39,868 INFO L93 Difference]: Finished difference Result 311 states and 406 transitions. [2024-09-20 18:52:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:52:39,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-20 18:52:39,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:39,870 INFO L225 Difference]: With dead ends: 311 [2024-09-20 18:52:39,870 INFO L226 Difference]: Without dead ends: 284 [2024-09-20 18:52:39,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:52:39,871 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:39,871 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 129 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:52:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-09-20 18:52:40,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 280. [2024-09-20 18:52:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.3418181818181818) internal successors, (369), 275 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 373 transitions. [2024-09-20 18:52:40,075 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 373 transitions. Word has length 36 [2024-09-20 18:52:40,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:40,075 INFO L474 AbstractCegarLoop]: Abstraction has 280 states and 373 transitions. [2024-09-20 18:52:40,075 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:40,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 373 transitions. [2024-09-20 18:52:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 18:52:40,076 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:40,076 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:40,093 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-20 18:52:40,276 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 18:52:40,277 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:40,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:40,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1937474636, now seen corresponding path program 19 times [2024-09-20 18:52:40,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:40,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915161465] [2024-09-20 18:52:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:40,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:40,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:52:40,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:40,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915161465] [2024-09-20 18:52:40,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915161465] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:40,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909134286] [2024-09-20 18:52:40,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:52:40,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:40,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:40,552 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) [2024-09-20 18:52:40,553 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 18:52:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:40,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 18:52:40,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-20 18:52:40,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-20 18:52:40,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909134286] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:40,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:40,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2024-09-20 18:52:40,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218263955] [2024-09-20 18:52:40,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:40,878 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 18:52:40,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:40,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 18:52:40,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-20 18:52:40,879 INFO L87 Difference]: Start difference. First operand 280 states and 373 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:45,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:52:53,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:53:01,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:53:09,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:53:13,727 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 [] [2024-09-20 18:53:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:53:13,886 INFO L93 Difference]: Finished difference Result 405 states and 548 transitions. [2024-09-20 18:53:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-20 18:53:13,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-20 18:53:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:53:13,888 INFO L225 Difference]: With dead ends: 405 [2024-09-20 18:53:13,888 INFO L226 Difference]: Without dead ends: 400 [2024-09-20 18:53:13,888 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=399, Invalid=1490, Unknown=3, NotChecked=0, Total=1892 [2024-09-20 18:53:13,888 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 49 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:53:13,888 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 218 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 258 Invalid, 5 Unknown, 0 Unchecked, 20.2s Time] [2024-09-20 18:53:13,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2024-09-20 18:53:14,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 351. [2024-09-20 18:53:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.3757225433526012) internal successors, (476), 346 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 480 transitions. [2024-09-20 18:53:14,229 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 480 transitions. Word has length 36 [2024-09-20 18:53:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:53:14,229 INFO L474 AbstractCegarLoop]: Abstraction has 351 states and 480 transitions. [2024-09-20 18:53:14,229 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:14,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 480 transitions. [2024-09-20 18:53:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 18:53:14,230 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:53:14,231 INFO L216 NwaCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:53:14,246 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-20 18:53:14,431 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-20 18:53:14,431 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:53:14,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1719779569, now seen corresponding path program 3 times [2024-09-20 18:53:14,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:53:14,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144133560] [2024-09-20 18:53:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:53:14,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:53:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:14,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:53:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-20 18:53:14,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:53:14,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144133560] [2024-09-20 18:53:14,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144133560] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:53:14,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475155793] [2024-09-20 18:53:14,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:53:14,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:14,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:53:14,714 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) [2024-09-20 18:53:14,716 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 18:53:14,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-20 18:53:14,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:53:14,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-20 18:53:14,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:53:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-20 18:53:15,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:53:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-20 18:53:15,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475155793] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:53:15,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:53:15,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2024-09-20 18:53:15,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302068524] [2024-09-20 18:53:15,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:53:15,638 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-20 18:53:15,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:53:15,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-20 18:53:15,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 18:53:15,639 INFO L87 Difference]: Start difference. First operand 351 states and 480 transitions. Second operand has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:18,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:53:18,300 INFO L93 Difference]: Finished difference Result 693 states and 928 transitions. [2024-09-20 18:53:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-20 18:53:18,301 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-09-20 18:53:18,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:53:18,303 INFO L225 Difference]: With dead ends: 693 [2024-09-20 18:53:18,303 INFO L226 Difference]: Without dead ends: 644 [2024-09-20 18:53:18,304 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1593, Invalid=6239, Unknown=0, NotChecked=0, Total=7832 [2024-09-20 18:53:18,304 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 196 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 18:53:18,304 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 303 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 18:53:18,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2024-09-20 18:53:18,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 468. [2024-09-20 18:53:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 463 states have (on average 1.4470842332613392) internal successors, (670), 463 states have internal predecessors, (670), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 674 transitions. [2024-09-20 18:53:18,716 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 674 transitions. Word has length 37 [2024-09-20 18:53:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:53:18,716 INFO L474 AbstractCegarLoop]: Abstraction has 468 states and 674 transitions. [2024-09-20 18:53:18,717 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:18,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 674 transitions. [2024-09-20 18:53:18,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 18:53:18,718 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:53:18,718 INFO L216 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:53:18,736 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-20 18:53:18,918 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-20 18:53:18,918 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:53:18,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:18,919 INFO L85 PathProgramCache]: Analyzing trace with hash 917296720, now seen corresponding path program 20 times [2024-09-20 18:53:18,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:53:18,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193947938] [2024-09-20 18:53:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:53:18,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:53:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:19,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:53:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:53:19,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:53:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193947938] [2024-09-20 18:53:19,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193947938] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:53:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134621525] [2024-09-20 18:53:19,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:53:19,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:19,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:53:19,235 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) [2024-09-20 18:53:19,237 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-20 18:53:19,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:53:19,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:53:19,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 18:53:19,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:53:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:53:19,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:53:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:53:19,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134621525] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:53:19,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:53:19,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2024-09-20 18:53:19,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319909036] [2024-09-20 18:53:19,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:53:19,910 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-20 18:53:19,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:53:19,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-20 18:53:19,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 18:53:19,911 INFO L87 Difference]: Start difference. First operand 468 states and 674 transitions. Second operand has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:53:54,167 INFO L93 Difference]: Finished difference Result 1360 states and 1994 transitions. [2024-09-20 18:53:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2024-09-20 18:53:54,168 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-09-20 18:53:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:53:54,171 INFO L225 Difference]: With dead ends: 1360 [2024-09-20 18:53:54,171 INFO L226 Difference]: Without dead ends: 1263 [2024-09-20 18:53:54,174 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24922 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=13370, Invalid=47886, Unknown=0, NotChecked=0, Total=61256 [2024-09-20 18:53:54,174 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 1704 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 888 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 888 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-20 18:53:54,174 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1704 Valid, 569 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [888 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-09-20 18:53:54,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2024-09-20 18:53:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 482. [2024-09-20 18:53:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 477 states have (on average 1.450733752620545) internal successors, (692), 477 states have internal predecessors, (692), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 696 transitions. [2024-09-20 18:53:54,733 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 696 transitions. Word has length 37 [2024-09-20 18:53:54,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:53:54,733 INFO L474 AbstractCegarLoop]: Abstraction has 482 states and 696 transitions. [2024-09-20 18:53:54,733 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:54,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 696 transitions. [2024-09-20 18:53:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 18:53:54,734 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:53:54,734 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:53:54,752 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-20 18:53:54,935 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:54,935 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:53:54,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:54,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1055077100, now seen corresponding path program 21 times [2024-09-20 18:53:54,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:53:54,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740735990] [2024-09-20 18:53:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:53:54,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:53:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:55,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:53:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:53:55,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:53:55,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740735990] [2024-09-20 18:53:55,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740735990] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:53:55,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936482494] [2024-09-20 18:53:55,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:53:55,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:55,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:53:55,664 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) [2024-09-20 18:53:55,665 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-20 18:53:55,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 18:53:55,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:53:55,786 WARN L260 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-09-20 18:53:55,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:53:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:53:57,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:53:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:53:59,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936482494] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:53:59,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:53:59,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32, 31] total 81 [2024-09-20 18:53:59,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492685466] [2024-09-20 18:53:59,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:53:59,402 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-09-20 18:53:59,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:53:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-09-20 18:53:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=5805, Unknown=0, NotChecked=0, Total=6480 [2024-09-20 18:53:59,402 INFO L87 Difference]: Start difference. First operand 482 states and 696 transitions. Second operand has 81 states, 80 states have (on average 1.1875) internal successors, (95), 79 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:04,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:54:04,199 INFO L93 Difference]: Finished difference Result 543 states and 764 transitions. [2024-09-20 18:54:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-09-20 18:54:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 1.1875) internal successors, (95), 79 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-20 18:54:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:54:04,201 INFO L225 Difference]: With dead ends: 543 [2024-09-20 18:54:04,201 INFO L226 Difference]: Without dead ends: 512 [2024-09-20 18:54:04,202 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2978 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1628, Invalid=10582, Unknown=0, NotChecked=0, Total=12210 [2024-09-20 18:54:04,202 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 151 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:54:04,202 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 357 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-20 18:54:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2024-09-20 18:54:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 500. [2024-09-20 18:54:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 495 states have (on average 1.4404040404040404) internal successors, (713), 495 states have internal predecessors, (713), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 717 transitions. [2024-09-20 18:54:04,717 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 717 transitions. Word has length 38 [2024-09-20 18:54:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:54:04,717 INFO L474 AbstractCegarLoop]: Abstraction has 500 states and 717 transitions. [2024-09-20 18:54:04,717 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 1.1875) internal successors, (95), 79 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:04,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:04,718 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 717 transitions. [2024-09-20 18:54:04,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 18:54:04,719 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:54:04,719 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:54:04,735 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-20 18:54:04,919 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:04,920 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:54:04,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash -91738348, now seen corresponding path program 4 times [2024-09-20 18:54:04,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:54:04,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081103997] [2024-09-20 18:54:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:54:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:54:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:05,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:54:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:54:05,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:54:05,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081103997] [2024-09-20 18:54:05,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081103997] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:54:05,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997802091] [2024-09-20 18:54:05,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:54:05,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:05,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:54:05,303 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) [2024-09-20 18:54:05,304 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-20 18:54:05,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:54:05,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:54:05,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 18:54:05,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:54:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:54:05,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:54:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:54:05,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997802091] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:54:05,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:54:05,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 26 [2024-09-20 18:54:05,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065714473] [2024-09-20 18:54:05,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:54:05,725 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 18:54:05,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:54:05,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 18:54:05,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2024-09-20 18:54:05,726 INFO L87 Difference]: Start difference. First operand 500 states and 717 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:54:06,404 INFO L93 Difference]: Finished difference Result 529 states and 757 transitions. [2024-09-20 18:54:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 18:54:06,405 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-20 18:54:06,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:54:06,407 INFO L225 Difference]: With dead ends: 529 [2024-09-20 18:54:06,407 INFO L226 Difference]: Without dead ends: 524 [2024-09-20 18:54:06,407 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2024-09-20 18:54:06,407 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 110 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:54:06,408 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 337 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:54:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-09-20 18:54:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 501. [2024-09-20 18:54:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 496 states have (on average 1.4375) internal successors, (713), 496 states have internal predecessors, (713), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 717 transitions. [2024-09-20 18:54:06,869 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 717 transitions. Word has length 38 [2024-09-20 18:54:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:54:06,869 INFO L474 AbstractCegarLoop]: Abstraction has 501 states and 717 transitions. [2024-09-20 18:54:06,869 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:06,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 717 transitions. [2024-09-20 18:54:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 18:54:06,870 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:54:06,870 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:54:06,881 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-20 18:54:07,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:07,070 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:54:07,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:07,071 INFO L85 PathProgramCache]: Analyzing trace with hash -549928001, now seen corresponding path program 5 times [2024-09-20 18:54:07,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:54:07,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821654434] [2024-09-20 18:54:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:54:07,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:54:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:07,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:54:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:54:07,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:54:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821654434] [2024-09-20 18:54:07,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821654434] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:54:07,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128032736] [2024-09-20 18:54:07,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:54:07,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:07,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:54:07,343 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) [2024-09-20 18:54:07,344 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-20 18:54:07,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 18:54:07,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:54:07,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-20 18:54:07,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:54:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:54:07,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:54:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:54:08,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128032736] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:54:08,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:54:08,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 47 [2024-09-20 18:54:08,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104598639] [2024-09-20 18:54:08,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:54:08,251 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-20 18:54:08,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:54:08,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-20 18:54:08,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 18:54:08,252 INFO L87 Difference]: Start difference. First operand 501 states and 717 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:54:12,075 INFO L93 Difference]: Finished difference Result 873 states and 1175 transitions. [2024-09-20 18:54:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-09-20 18:54:12,075 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-09-20 18:54:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:54:12,078 INFO L225 Difference]: With dead ends: 873 [2024-09-20 18:54:12,078 INFO L226 Difference]: Without dead ends: 816 [2024-09-20 18:54:12,079 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3103 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2234, Invalid=8686, Unknown=0, NotChecked=0, Total=10920 [2024-09-20 18:54:12,079 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 369 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 18:54:12,079 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 282 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 18:54:12,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2024-09-20 18:54:12,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 597. [2024-09-20 18:54:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 592 states have (on average 1.429054054054054) internal successors, (846), 592 states have internal predecessors, (846), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 850 transitions. [2024-09-20 18:54:12,679 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 850 transitions. Word has length 39 [2024-09-20 18:54:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:54:12,680 INFO L474 AbstractCegarLoop]: Abstraction has 597 states and 850 transitions. [2024-09-20 18:54:12,680 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:12,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 850 transitions. [2024-09-20 18:54:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 18:54:12,681 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:54:12,681 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:54:12,693 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-20 18:54:12,881 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-20 18:54:12,881 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:54:12,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:12,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1368474127, now seen corresponding path program 6 times [2024-09-20 18:54:12,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:54:12,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256704436] [2024-09-20 18:54:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:54:12,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:54:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:13,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:54:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:54:13,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:54:13,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256704436] [2024-09-20 18:54:13,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256704436] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:54:13,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62231141] [2024-09-20 18:54:13,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:54:13,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:13,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:54:13,298 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) [2024-09-20 18:54:13,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-20 18:54:13,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-20 18:54:13,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:54:13,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 18:54:13,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:54:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:54:13,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:54:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:54:13,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62231141] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:54:13,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:54:13,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 29 [2024-09-20 18:54:13,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381900495] [2024-09-20 18:54:13,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:54:13,855 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 18:54:13,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:54:13,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 18:54:13,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2024-09-20 18:54:13,855 INFO L87 Difference]: Start difference. First operand 597 states and 850 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:54:14,701 INFO L93 Difference]: Finished difference Result 620 states and 886 transitions. [2024-09-20 18:54:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 18:54:14,702 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-20 18:54:14,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:54:14,704 INFO L225 Difference]: With dead ends: 620 [2024-09-20 18:54:14,704 INFO L226 Difference]: Without dead ends: 615 [2024-09-20 18:54:14,705 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 57 SyntacticMatches, 19 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2024-09-20 18:54:14,705 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 97 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:54:14,705 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 425 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:54:14,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2024-09-20 18:54:15,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 595. [2024-09-20 18:54:15,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 590 states have (on average 1.4254237288135594) internal successors, (841), 590 states have internal predecessors, (841), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:15,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 845 transitions. [2024-09-20 18:54:15,353 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 845 transitions. Word has length 41 [2024-09-20 18:54:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:54:15,353 INFO L474 AbstractCegarLoop]: Abstraction has 595 states and 845 transitions. [2024-09-20 18:54:15,353 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:15,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:15,353 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 845 transitions. [2024-09-20 18:54:15,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 18:54:15,354 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:54:15,354 INFO L216 NwaCegarLoop]: trace histogram [15, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:54:15,367 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-20 18:54:15,555 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-20 18:54:15,555 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:54:15,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:15,555 INFO L85 PathProgramCache]: Analyzing trace with hash 997028128, now seen corresponding path program 22 times [2024-09-20 18:54:15,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:54:15,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644463888] [2024-09-20 18:54:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:54:15,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:54:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:15,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:54:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 18:54:15,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:54:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644463888] [2024-09-20 18:54:15,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644463888] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:54:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663169499] [2024-09-20 18:54:15,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:54:15,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:15,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:54:15,896 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) [2024-09-20 18:54:15,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-20 18:54:15,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:54:15,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:54:15,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 18:54:15,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:54:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 18:54:15,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:54:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 18:54:16,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663169499] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:54:16,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:54:16,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2024-09-20 18:54:16,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465354907] [2024-09-20 18:54:16,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:54:16,814 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-20 18:54:16,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:54:16,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-20 18:54:16,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 18:54:16,815 INFO L87 Difference]: Start difference. First operand 595 states and 845 transitions. Second operand has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)