./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i --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 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/nla-digbench-scaling/divbin2_unwindbound100.i -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 f26bb7c01ef96852e13a34034142a6eda53bd301e224804a84caad37f299321b --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-6908dde-m [2024-09-24 23:26:05,371 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:26:05,425 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:26:05,431 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:26:05,432 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:26:05,458 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:26:05,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:26:05,459 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:26:05,460 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:26:05,462 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:26:05,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:26:05,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:26:05,463 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:26:05,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:26:05,465 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:26:05,465 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:26:05,465 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:26:05,466 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:26:05,466 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:26:05,466 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:26:05,466 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:26:05,467 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:26:05,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:26:05,468 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:26:05,468 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:26:05,468 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:26:05,469 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:26:05,469 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:26:05,469 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:26:05,469 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:26:05,470 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:26:05,470 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:26:05,470 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:26:05,471 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:26:05,471 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:26:05,471 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:26:05,472 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:26:05,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:26:05,472 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:26:05,472 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:26:05,472 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:26:05,473 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:26:05,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f26bb7c01ef96852e13a34034142a6eda53bd301e224804a84caad37f299321b Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:26:05,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:26:05,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:26:05,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:26:05,692 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:26:05,692 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:26:05,693 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i [2024-09-24 23:26:06,958 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:26:07,119 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:26:07,120 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i [2024-09-24 23:26:07,128 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f249d9e10/16dc747e577f4ce0833a251b282116a3/FLAGea8a9840b [2024-09-24 23:26:07,526 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f249d9e10/16dc747e577f4ce0833a251b282116a3 [2024-09-24 23:26:07,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:26:07,530 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:26:07,532 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:26:07,533 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:26:07,537 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:26:07,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f0a61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07, skipping insertion in model container [2024-09-24 23:26:07,539 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,556 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:26:07,680 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/nla-digbench-scaling/divbin2_unwindbound100.i[951,964] [2024-09-24 23:26:07,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:26:07,708 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:26:07,716 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/nla-digbench-scaling/divbin2_unwindbound100.i[951,964] [2024-09-24 23:26:07,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:26:07,735 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:26:07,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07 WrapperNode [2024-09-24 23:26:07,736 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:26:07,737 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:26:07,737 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:26:07,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:26:07,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,748 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,753 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:26:07,753 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:26:07,754 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:26:07,754 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:26:07,769 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:26:07,781 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,782 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,794 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]. [2024-09-24 23:26:07,795 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,795 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,805 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,805 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:26:07,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:26:07,807 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:26:07,807 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:26:07,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (1/1) ... [2024-09-24 23:26:07,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:26:07,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:26:07,838 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) [2024-09-24 23:26:07,840 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 [2024-09-24 23:26:07,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:26:07,872 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:26:07,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:26:07,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:26:07,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:26:07,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:26:07,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:26:07,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:26:07,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:26:07,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:26:07,925 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:26:07,927 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:26:08,049 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-24 23:26:08,049 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:26:08,062 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:26:08,062 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-24 23:26:08,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:26:08 BoogieIcfgContainer [2024-09-24 23:26:08,062 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:26:08,064 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:26:08,064 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:26:08,068 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:26:08,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:26:07" (1/3) ... [2024-09-24 23:26:08,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c7b5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:26:08, skipping insertion in model container [2024-09-24 23:26:08,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:07" (2/3) ... [2024-09-24 23:26:08,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c7b5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:26:08, skipping insertion in model container [2024-09-24 23:26:08,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:26:08" (3/3) ... [2024-09-24 23:26:08,070 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound100.i [2024-09-24 23:26:08,082 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:26:08,082 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:26:08,132 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:26:08,137 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;@2dd341bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:26:08,137 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:26:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 23:26:08,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-24 23:26:08,145 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:26:08,146 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:26:08,146 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:26:08,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:08,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1996614108, now seen corresponding path program 1 times [2024-09-24 23:26:08,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:26:08,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133425095] [2024-09-24 23:26:08,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:08,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:26:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:08,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:26:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:26:08,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:26:08,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133425095] [2024-09-24 23:26:08,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133425095] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:26:08,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:26:08,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 23:26:08,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573910221] [2024-09-24 23:26:08,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:26:08,322 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 23:26:08,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:26:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 23:26:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:26:08,350 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 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) [2024-09-24 23:26:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:26:08,395 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2024-09-24 23:26:08,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 23:26:08,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 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) Word has length 11 [2024-09-24 23:26:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:26:08,402 INFO L225 Difference]: With dead ends: 41 [2024-09-24 23:26:08,402 INFO L226 Difference]: Without dead ends: 21 [2024-09-24 23:26:08,404 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:26:08,408 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:26:08,408 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:26:08,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-24 23:26:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2024-09-24 23:26:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:26:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-09-24 23:26:08,488 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2024-09-24 23:26:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:26:08,490 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-09-24 23:26:08,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 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) [2024-09-24 23:26:08,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-09-24 23:26:08,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-24 23:26:08,492 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:26:08,492 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:26:08,492 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:26:08,492 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:26:08,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:08,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1251497910, now seen corresponding path program 1 times [2024-09-24 23:26:08,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:26:08,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081442316] [2024-09-24 23:26:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:08,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:26:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:08,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:26:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:26:08,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:26:08,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081442316] [2024-09-24 23:26:08,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081442316] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:26:08,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:26:08,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-24 23:26:08,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771075735] [2024-09-24 23:26:08,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:26:08,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:26:08,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:26:08,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:26:08,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:26:08,667 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-09-24 23:26:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:26:08,752 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-09-24 23:26:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:26:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) Word has length 13 [2024-09-24 23:26:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:26:08,754 INFO L225 Difference]: With dead ends: 34 [2024-09-24 23:26:08,754 INFO L226 Difference]: Without dead ends: 22 [2024-09-24 23:26:08,754 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:26:08,755 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:26:08,755 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:26:08,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-24 23:26:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-24 23:26:08,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:26:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-09-24 23:26:08,768 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2024-09-24 23:26:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:26:08,768 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-09-24 23:26:08,769 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-09-24 23:26:08,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-09-24 23:26:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-24 23:26:08,770 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:26:08,770 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:26:08,770 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 23:26:08,773 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:26:08,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash -239317110, now seen corresponding path program 1 times [2024-09-24 23:26:08,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:26:08,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704485285] [2024-09-24 23:26:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:08,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:26:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:26:08,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638273600] [2024-09-24 23:26:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:08,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:26:08,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:26:08,800 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) [2024-09-24 23:26:08,802 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:26:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:08,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:26:08,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:26:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:26:08,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:26:08,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:26:08,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704485285] [2024-09-24 23:26:08,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:26:08,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638273600] [2024-09-24 23:26:08,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638273600] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:26:08,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:26:08,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:26:08,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424498133] [2024-09-24 23:26:08,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:26:08,944 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:26:08,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:26:08,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:26:08,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:26:08,946 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:26:09,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:26:09,003 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2024-09-24 23:26:09,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:26:09,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-24 23:26:09,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:26:09,004 INFO L225 Difference]: With dead ends: 34 [2024-09-24 23:26:09,004 INFO L226 Difference]: Without dead ends: 31 [2024-09-24 23:26:09,004 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:26:09,005 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:26:09,005 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:26:09,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-24 23:26:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-24 23:26:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:26:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-09-24 23:26:09,014 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 14 [2024-09-24 23:26:09,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:26:09,014 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-09-24 23:26:09,014 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:26:09,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-09-24 23:26:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-24 23:26:09,018 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:26:09,018 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:26:09,037 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:26:09,222 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:26:09,223 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:26:09,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:09,224 INFO L85 PathProgramCache]: Analyzing trace with hash 726925940, now seen corresponding path program 1 times [2024-09-24 23:26:09,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:26:09,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160530287] [2024-09-24 23:26:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:09,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:26:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:09,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:26:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:09,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:26:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:26:09,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:26:09,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160530287] [2024-09-24 23:26:09,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160530287] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:26:09,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:26:09,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-24 23:26:09,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245403353] [2024-09-24 23:26:09,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:26:09,425 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-24 23:26:09,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:26:09,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-24 23:26:09,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-24 23:26:09,426 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:26:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:26:09,473 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2024-09-24 23:26:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:26:09,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-09-24 23:26:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:26:09,475 INFO L225 Difference]: With dead ends: 57 [2024-09-24 23:26:09,475 INFO L226 Difference]: Without dead ends: 32 [2024-09-24 23:26:09,475 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:26:09,476 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:26:09,476 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 36 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:26:09,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-24 23:26:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-24 23:26:09,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:26:09,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-09-24 23:26:09,489 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2024-09-24 23:26:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:26:09,490 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-09-24 23:26:09,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:26:09,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-09-24 23:26:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-24 23:26:09,492 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:26:09,492 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:26:09,492 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-24 23:26:09,493 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:26:09,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:09,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1153424271, now seen corresponding path program 1 times [2024-09-24 23:26:09,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:26:09,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228557877] [2024-09-24 23:26:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:09,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:26:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:09,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:26:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:09,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-24 23:26:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:26:09,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:26:09,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228557877] [2024-09-24 23:26:09,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228557877] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:26:09,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423773921] [2024-09-24 23:26:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:09,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:26:09,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:26:09,628 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) [2024-09-24 23:26:09,645 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:26:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:09,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:26:09,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:26:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-24 23:26:09,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:26:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:26:09,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423773921] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:26:09,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:26:09,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-24 23:26:09,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131459943] [2024-09-24 23:26:09,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:26:09,783 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-24 23:26:09,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:26:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-24 23:26:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:26:09,785 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:26:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:26:09,893 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2024-09-24 23:26:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-24 23:26:09,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2024-09-24 23:26:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:26:09,895 INFO L225 Difference]: With dead ends: 72 [2024-09-24 23:26:09,896 INFO L226 Difference]: Without dead ends: 51 [2024-09-24 23:26:09,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:26:09,897 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:26:09,899 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 82 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:26:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-24 23:26:09,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2024-09-24 23:26:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:26:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-24 23:26:09,913 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 25 [2024-09-24 23:26:09,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:26:09,913 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-24 23:26:09,914 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:26:09,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-24 23:26:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-24 23:26:09,915 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:26:09,915 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:26:09,929 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-24 23:26:10,119 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:26:10,120 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:26:10,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1935504499, now seen corresponding path program 1 times [2024-09-24 23:26:10,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:26:10,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122503836] [2024-09-24 23:26:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:10,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:26:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:26:10,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229668489] [2024-09-24 23:26:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:10,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:26:10,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:26:10,144 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) [2024-09-24 23:26:10,146 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:26:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:10,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-24 23:26:10,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:26:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:26:10,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:26:35,400 WARN L293 SmtUtils]: Spent 13.96s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:26:39,405 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~A~0 4294967296)) (.cse1 (mod c_main_~b~0 2147483648))) (or (= .cse0 (mod (+ c_main_~r~0 (* c_main_~q~0 2 .cse1)) 4294967296)) (not (= .cse0 (mod (+ (* c_main_~b~0 c_main_~q~0 2) c_main_~r~0) 4294967296))) (< (* 2 .cse1) (+ 1 (mod c_main_~r~0 4294967296))))) is different from true [2024-09-24 23:27:03,526 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:27:27,622 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:27:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-09-24 23:27:27,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:27:27,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122503836] [2024-09-24 23:27:27,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:27:27,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229668489] [2024-09-24 23:27:27,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229668489] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:27:27,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:27:27,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2024-09-24 23:27:27,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069786981] [2024-09-24 23:27:27,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:27:27,632 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-24 23:27:27,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:27:27,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-24 23:27:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=186, Unknown=1, NotChecked=28, Total=272 [2024-09-24 23:27:27,633 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:27:31,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:27:35,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:27:41,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:27:45,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:27:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:27:47,507 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2024-09-24 23:27:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-24 23:27:47,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2024-09-24 23:27:47,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:27:47,513 INFO L225 Difference]: With dead ends: 85 [2024-09-24 23:27:47,513 INFO L226 Difference]: Without dead ends: 80 [2024-09-24 23:27:47,514 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=74, Invalid=235, Unknown=1, NotChecked=32, Total=342 [2024-09-24 23:27:47,515 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 10 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:27:47,515 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 239 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 207 Invalid, 4 Unknown, 81 Unchecked, 19.5s Time] [2024-09-24 23:27:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-24 23:27:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2024-09-24 23:27:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 64 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-24 23:27:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-09-24 23:27:47,537 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 26 [2024-09-24 23:27:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:27:47,537 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-09-24 23:27:47,537 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:27:47,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:27:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-09-24 23:27:47,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-24 23:27:47,542 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:27:47,542 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:27:47,551 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:27:47,743 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-24 23:27:47,743 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:27:47,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:27:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1306939949, now seen corresponding path program 2 times [2024-09-24 23:27:47,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:27:47,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657459005] [2024-09-24 23:27:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:27:47,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:27:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:27:47,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874584303] [2024-09-24 23:27:47,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:27:47,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:27:47,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:27:47,775 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) [2024-09-24 23:27:47,776 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:27:47,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:27:47,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:27:47,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-24 23:27:47,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:27:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:27:48,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:28:01,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:28:01,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657459005] [2024-09-24 23:28:01,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:28:01,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874584303] [2024-09-24 23:28:01,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874584303] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:28:01,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:28:01,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-24 23:28:01,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15824316] [2024-09-24 23:28:01,188 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:28:01,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-24 23:28:01,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:28:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-24 23:28:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=182, Unknown=3, NotChecked=0, Total=240 [2024-09-24 23:28:01,189 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:28:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:28:01,390 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2024-09-24 23:28:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-24 23:28:01,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2024-09-24 23:28:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:28:01,392 INFO L225 Difference]: With dead ends: 123 [2024-09-24 23:28:01,392 INFO L226 Difference]: Without dead ends: 120 [2024-09-24 23:28:01,392 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=61, Invalid=208, Unknown=3, NotChecked=0, Total=272 [2024-09-24 23:28:01,392 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:28:01,393 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 218 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:28:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-24 23:28:01,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2024-09-24 23:28:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.197674418604651) internal successors, (103), 91 states have internal predecessors, (103), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-24 23:28:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2024-09-24 23:28:01,419 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 32 [2024-09-24 23:28:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:28:01,419 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2024-09-24 23:28:01,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:28:01,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:28:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2024-09-24 23:28:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-24 23:28:01,421 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:28:01,421 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:28:01,427 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-24 23:28:01,621 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:28:01,622 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:28:01,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:28:01,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2037540399, now seen corresponding path program 3 times [2024-09-24 23:28:01,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:28:01,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052803155] [2024-09-24 23:28:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:28:01,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:28:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:28:01,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:28:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:28:01,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-24 23:28:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:28:01,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-24 23:28:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:28:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:28:01,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:28:01,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052803155] [2024-09-24 23:28:01,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052803155] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:28:01,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543017484] [2024-09-24 23:28:01,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:28:01,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:28:01,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:28:01,961 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) [2024-09-24 23:28:01,962 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:29:59,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 23:29:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:29:59,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-24 23:29:59,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:00,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:30:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:00,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543017484] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:30:00,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:30:00,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2024-09-24 23:30:00,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598110386] [2024-09-24 23:30:00,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:30:00,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-24 23:30:00,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:00,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-24 23:30:00,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-09-24 23:30:00,295 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-24 23:30:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:00,427 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2024-09-24 23:30:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:30:00,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 35 [2024-09-24 23:30:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:00,430 INFO L225 Difference]: With dead ends: 137 [2024-09-24 23:30:00,430 INFO L226 Difference]: Without dead ends: 69 [2024-09-24 23:30:00,431 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-09-24 23:30:00,432 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:00,432 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 123 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:30:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-24 23:30:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2024-09-24 23:30:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.183673469387755) internal successors, (58), 52 states have internal predecessors, (58), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-24 23:30:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2024-09-24 23:30:00,456 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 35 [2024-09-24 23:30:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:00,456 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2024-09-24 23:30:00,456 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-24 23:30:00,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2024-09-24 23:30:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-24 23:30:00,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:00,457 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:00,500 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-24 23:30:00,657 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-24 23:30:00,658 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:00,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:00,659 INFO L85 PathProgramCache]: Analyzing trace with hash 201138440, now seen corresponding path program 2 times [2024-09-24 23:30:00,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:00,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794694861] [2024-09-24 23:30:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:00,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:00,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:30:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:00,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:30:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:30:00,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:00,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794694861] [2024-09-24 23:30:00,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794694861] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:30:00,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92956816] [2024-09-24 23:30:00,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:30:00,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:00,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:00,795 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) [2024-09-24 23:30:00,796 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:30:00,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:30:00,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:30:00,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-24 23:30:00,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-24 23:30:00,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:30:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:30:01,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92956816] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:30:01,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:30:01,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2024-09-24 23:30:01,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241663854] [2024-09-24 23:30:01,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:30:01,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-24 23:30:01,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:01,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-24 23:30:01,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2024-09-24 23:30:01,016 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:30:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:01,332 INFO L93 Difference]: Finished difference Result 252 states and 292 transitions. [2024-09-24 23:30:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-24 23:30:01,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2024-09-24 23:30:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:01,334 INFO L225 Difference]: With dead ends: 252 [2024-09-24 23:30:01,334 INFO L226 Difference]: Without dead ends: 219 [2024-09-24 23:30:01,335 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2024-09-24 23:30:01,336 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 163 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:01,336 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 120 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:30:01,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-09-24 23:30:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 122. [2024-09-24 23:30:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 101 states have internal predecessors, (117), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-24 23:30:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2024-09-24 23:30:01,364 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 34 [2024-09-24 23:30:01,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:01,364 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2024-09-24 23:30:01,364 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:30:01,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:01,365 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2024-09-24 23:30:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-24 23:30:01,366 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:01,366 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:01,374 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-24 23:30:01,570 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:01,571 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:01,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:01,571 INFO L85 PathProgramCache]: Analyzing trace with hash -870169238, now seen corresponding path program 4 times [2024-09-24 23:30:01,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:01,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186357546] [2024-09-24 23:30:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:01,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:30:01,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595622113] [2024-09-24 23:30:01,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:30:01,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:01,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:01,613 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) [2024-09-24 23:30:01,614 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 23:30:01,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:30:01,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:30:01,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-24 23:30:01,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:30:02,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:30:41,927 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)