./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/half_2.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 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/loop-invgen/half_2.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 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 10:22:34,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:22:34,592 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:22:34,602 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:22:34,603 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:22:34,634 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:22:34,634 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:22:34,635 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:22:34,636 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:22:34,640 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:22:34,641 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:22:34,641 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:22:34,641 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:22:34,642 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:22:34,642 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:22:34,642 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:22:34,643 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:22:34,643 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:22:34,643 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:22:34,643 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:22:34,644 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:22:34,645 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:22:34,646 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:22:34,646 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:22:34,646 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:22:34,646 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:22:34,647 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:22:34,647 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:22:34,647 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:22:34,648 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:22:34,649 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:22:34,649 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:22:34,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:22:34,650 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:22:34,650 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:22:34,651 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:22:34,651 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:22:34,651 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:22:34,652 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:22:34,652 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:22:34,652 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:22:34,653 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:22:34,653 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 -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true 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 [2024-09-25 10:22:35,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:22:35,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:22:35,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:22:35,033 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:22:35,034 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:22:35,035 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/half_2.i [2024-09-25 10:22:36,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:22:36,762 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:22:36,764 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/half_2.i [2024-09-25 10:22:36,774 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c398af8c9/43878d8ef6374e05a6e31310e612beb2/FLAG7b6abb0bf [2024-09-25 10:22:36,793 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c398af8c9/43878d8ef6374e05a6e31310e612beb2 [2024-09-25 10:22:36,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:22:36,799 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:22:36,802 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:22:36,803 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:22:36,808 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:22:36,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:22:36" (1/1) ... [2024-09-25 10:22:36,810 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ba7864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:36, skipping insertion in model container [2024-09-25 10:22:36,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:22:36" (1/1) ... [2024-09-25 10:22:36,831 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:22:36,997 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/loop-invgen/half_2.i[893,906] [2024-09-25 10:22:37,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:22:37,028 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:22:37,046 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/loop-invgen/half_2.i[893,906] [2024-09-25 10:22:37,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:22:37,066 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:22:37,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37 WrapperNode [2024-09-25 10:22:37,067 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:22:37,068 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:22:37,068 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:22:37,069 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:22:37,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (1/1) ... [2024-09-25 10:22:37,083 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (1/1) ... [2024-09-25 10:22:37,089 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:22:37,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:22:37,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:22:37,091 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:22:37,091 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:22:37,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (1/1) ... [2024-09-25 10:22:37,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (1/1) ... [2024-09-25 10:22:37,101 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (1/1) ... [2024-09-25 10:22:37,117 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]. [2024-09-25 10:22:37,117 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (1/1) ... [2024-09-25 10:22:37,117 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (1/1) ... [2024-09-25 10:22:37,120 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (1/1) ... [2024-09-25 10:22:37,124 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (1/1) ... [2024-09-25 10:22:37,125 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (1/1) ... [2024-09-25 10:22:37,126 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (1/1) ... [2024-09-25 10:22:37,128 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:22:37,132 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:22:37,132 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:22:37,132 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:22:37,132 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (1/1) ... [2024-09-25 10:22:37,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:22:37,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:37,163 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) [2024-09-25 10:22:37,168 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 [2024-09-25 10:22:37,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:22:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:22:37,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:22:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:22:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:22:37,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:22:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:22:37,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:22:37,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 10:22:37,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 10:22:37,274 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:22:37,275 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:22:37,442 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-25 10:22:37,443 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:22:37,465 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:22:37,465 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 10:22:37,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:22:37 BoogieIcfgContainer [2024-09-25 10:22:37,466 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:22:37,469 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:22:37,469 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:22:37,472 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:22:37,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:22:36" (1/3) ... [2024-09-25 10:22:37,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7eda8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:22:37, skipping insertion in model container [2024-09-25 10:22:37,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:22:37" (2/3) ... [2024-09-25 10:22:37,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7eda8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:22:37, skipping insertion in model container [2024-09-25 10:22:37,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:22:37" (3/3) ... [2024-09-25 10:22:37,475 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i [2024-09-25 10:22:37,492 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:22:37,492 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 10:22:37,556 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:22:37,565 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;@2b1797eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:22:37,566 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 10:22:37,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:22:37,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 10:22:37,577 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:37,578 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:37,579 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:37,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1892212544, now seen corresponding path program 1 times [2024-09-25 10:22:37,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:37,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036219392] [2024-09-25 10:22:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:37,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:38,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:22:38,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:38,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036219392] [2024-09-25 10:22:38,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036219392] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:22:38,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:22:38,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-25 10:22:38,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302055750] [2024-09-25 10:22:38,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:22:38,045 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 10:22:38,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:38,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 10:22:38,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-25 10:22:38,074 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2024-09-25 10:22:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:38,225 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-09-25 10:22:38,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 10:22:38,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 13 [2024-09-25 10:22:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:38,234 INFO L225 Difference]: With dead ends: 46 [2024-09-25 10:22:38,234 INFO L226 Difference]: Without dead ends: 26 [2024-09-25 10:22:38,237 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:22:38,240 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:38,241 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:22:38,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-25 10:22:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-09-25 10:22:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:22:38,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2024-09-25 10:22:38,269 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2024-09-25 10:22:38,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:38,270 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2024-09-25 10:22:38,270 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2024-09-25 10:22:38,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2024-09-25 10:22:38,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-25 10:22:38,271 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:38,271 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:38,271 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 10:22:38,272 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:38,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:38,272 INFO L85 PathProgramCache]: Analyzing trace with hash 706153222, now seen corresponding path program 1 times [2024-09-25 10:22:38,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:38,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143544718] [2024-09-25 10:22:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:38,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:38,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:22:38,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143544718] [2024-09-25 10:22:38,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143544718] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:38,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452663389] [2024-09-25 10:22:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:38,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:38,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:38,529 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) [2024-09-25 10:22:38,531 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 10:22:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:38,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-25 10:22:38,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:22:38,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:22:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:22:38,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452663389] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:22:38,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:22:38,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-25 10:22:38,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928014681] [2024-09-25 10:22:38,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:22:38,997 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 10:22:38,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:38,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 10:22:38,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:22:38,999 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:22:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:39,283 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2024-09-25 10:22:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 10:22:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-25 10:22:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:39,286 INFO L225 Difference]: With dead ends: 43 [2024-09-25 10:22:39,286 INFO L226 Difference]: Without dead ends: 41 [2024-09-25 10:22:39,287 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-09-25 10:22:39,288 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:39,289 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 96 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:22:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-25 10:22:39,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-09-25 10:22:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:22:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-09-25 10:22:39,304 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 14 [2024-09-25 10:22:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:39,306 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-09-25 10:22:39,306 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:22:39,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-09-25 10:22:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-25 10:22:39,309 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:39,309 INFO L216 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:39,326 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 10:22:39,513 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:39,514 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:39,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:39,515 INFO L85 PathProgramCache]: Analyzing trace with hash 956344902, now seen corresponding path program 2 times [2024-09-25 10:22:39,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:39,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967430545] [2024-09-25 10:22:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:39,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:39,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:22:39,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:39,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967430545] [2024-09-25 10:22:39,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967430545] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:39,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763256082] [2024-09-25 10:22:39,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:22:39,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:39,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:39,664 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) [2024-09-25 10:22:39,668 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 10:22:39,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:22:39,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:22:39,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-25 10:22:39,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:22:39,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:22:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:22:39,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763256082] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:22:39,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:22:39,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-09-25 10:22:39,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620400230] [2024-09-25 10:22:39,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:22:39,926 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 10:22:39,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:39,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 10:22:39,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:22:39,928 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:22:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:40,081 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2024-09-25 10:22:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 10:22:40,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-25 10:22:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:40,083 INFO L225 Difference]: With dead ends: 56 [2024-09-25 10:22:40,083 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 10:22:40,084 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:22:40,085 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:40,085 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 173 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:22:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 10:22:40,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2024-09-25 10:22:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:22:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-09-25 10:22:40,100 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 16 [2024-09-25 10:22:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:40,100 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-09-25 10:22:40,100 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:22:40,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-09-25 10:22:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-25 10:22:40,102 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:40,102 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:40,118 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 10:22:40,302 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:40,303 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:40,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:40,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1089087464, now seen corresponding path program 1 times [2024-09-25 10:22:40,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:40,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807096489] [2024-09-25 10:22:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:40,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:40,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:40,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-25 10:22:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:22:40,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:40,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807096489] [2024-09-25 10:22:40,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807096489] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:40,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110638264] [2024-09-25 10:22:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:40,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:40,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:40,421 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) [2024-09-25 10:22:40,423 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 10:22:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:40,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-25 10:22:40,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:22:40,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:22:40,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110638264] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:22:40,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:22:40,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-25 10:22:40,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123362935] [2024-09-25 10:22:40,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:22:40,508 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 10:22:40,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:40,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 10:22:40,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:22:40,509 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-09-25 10:22:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:40,547 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2024-09-25 10:22:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 10:22:40,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 20 [2024-09-25 10:22:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:40,549 INFO L225 Difference]: With dead ends: 48 [2024-09-25 10:22:40,550 INFO L226 Difference]: Without dead ends: 36 [2024-09-25 10:22:40,550 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:22:40,551 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:40,551 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:22:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-25 10:22:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-25 10:22:40,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:22:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-09-25 10:22:40,565 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2024-09-25 10:22:40,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:40,566 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-09-25 10:22:40,566 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-09-25 10:22:40,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-09-25 10:22:40,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-25 10:22:40,567 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:40,567 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:40,584 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 10:22:40,768 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:40,768 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:40,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash -177252568, now seen corresponding path program 1 times [2024-09-25 10:22:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:40,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699563917] [2024-09-25 10:22:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:40,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:41,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:41,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:22:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:22:41,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:41,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699563917] [2024-09-25 10:22:41,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699563917] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:41,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219503878] [2024-09-25 10:22:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:41,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:41,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:41,092 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) [2024-09-25 10:22:41,094 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 10:22:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:41,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-25 10:22:41,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:22:41,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:22:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:22:41,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219503878] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:22:41,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:22:41,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2024-09-25 10:22:41,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738672840] [2024-09-25 10:22:41,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:22:41,568 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 10:22:41,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:41,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 10:22:41,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:22:41,571 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:22:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:41,918 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-09-25 10:22:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:22:41,918 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2024-09-25 10:22:41,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:41,920 INFO L225 Difference]: With dead ends: 66 [2024-09-25 10:22:41,922 INFO L226 Difference]: Without dead ends: 46 [2024-09-25 10:22:41,923 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2024-09-25 10:22:41,924 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:41,924 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 132 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:22:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-25 10:22:41,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2024-09-25 10:22:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:22:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-09-25 10:22:41,941 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 22 [2024-09-25 10:22:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:41,942 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-09-25 10:22:41,942 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:22:41,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:41,943 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-09-25 10:22:41,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-25 10:22:41,944 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:41,944 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:41,962 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 10:22:42,145 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:42,146 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:42,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:42,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1835559814, now seen corresponding path program 2 times [2024-09-25 10:22:42,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:42,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640022491] [2024-09-25 10:22:42,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:42,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:42,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:42,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 10:22:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:42,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 10:22:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:22:42,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:42,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640022491] [2024-09-25 10:22:42,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640022491] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:42,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798057935] [2024-09-25 10:22:42,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:22:42,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:42,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:42,347 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) [2024-09-25 10:22:42,349 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 10:22:42,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:22:42,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:22:42,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-25 10:22:42,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:22:42,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:22:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:22:42,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798057935] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:22:42,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:22:42,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-09-25 10:22:42,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191932133] [2024-09-25 10:22:42,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:22:42,595 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 10:22:42,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:42,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 10:22:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-09-25 10:22:42,598 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:22:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:42,718 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2024-09-25 10:22:42,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:22:42,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 28 [2024-09-25 10:22:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:42,720 INFO L225 Difference]: With dead ends: 60 [2024-09-25 10:22:42,720 INFO L226 Difference]: Without dead ends: 41 [2024-09-25 10:22:42,720 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-09-25 10:22:42,721 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:42,721 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:22:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-25 10:22:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-25 10:22:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:22:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-09-25 10:22:42,736 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 28 [2024-09-25 10:22:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:42,736 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-09-25 10:22:42,736 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:22:42,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-09-25 10:22:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-25 10:22:42,737 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:42,737 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:42,756 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 10:22:42,938 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-25 10:22:42,938 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:42,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:42,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1852463814, now seen corresponding path program 3 times [2024-09-25 10:22:42,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:42,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714040796] [2024-09-25 10:22:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:42,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:43,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:43,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-25 10:22:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:43,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:22:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:22:43,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:43,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714040796] [2024-09-25 10:22:43,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714040796] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:43,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505751488] [2024-09-25 10:22:43,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:22:43,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:43,250 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) [2024-09-25 10:22:43,252 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 10:22:43,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-25 10:22:43,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:22:43,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-25 10:22:43,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:22:43,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:22:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:22:43,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505751488] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:22:43,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:22:43,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2024-09-25 10:22:43,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823543160] [2024-09-25 10:22:43,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:22:43,922 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-25 10:22:43,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:43,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-25 10:22:43,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2024-09-25 10:22:43,924 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 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) [2024-09-25 10:22:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:44,224 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2024-09-25 10:22:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 10:22:44,224 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 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 30 [2024-09-25 10:22:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:44,225 INFO L225 Difference]: With dead ends: 68 [2024-09-25 10:22:44,225 INFO L226 Difference]: Without dead ends: 45 [2024-09-25 10:22:44,226 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 10:22:44,227 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:44,227 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 174 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:22:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-25 10:22:44,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-25 10:22:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:22:44,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-09-25 10:22:44,235 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 30 [2024-09-25 10:22:44,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:44,236 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-09-25 10:22:44,236 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 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) [2024-09-25 10:22:44,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:44,237 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-09-25 10:22:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-25 10:22:44,237 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:44,237 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:44,254 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 10:22:44,441 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:44,442 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:44,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:44,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1152152512, now seen corresponding path program 4 times [2024-09-25 10:22:44,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:44,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764499969] [2024-09-25 10:22:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:44,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:44,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:44,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 10:22:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:44,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:22:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:22:44,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:44,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764499969] [2024-09-25 10:22:44,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764499969] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:44,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210843832] [2024-09-25 10:22:44,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:22:44,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:44,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:44,597 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) [2024-09-25 10:22:44,604 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 10:22:44,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:22:44,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:22:44,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-25 10:22:44,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:22:44,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:22:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:22:44,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210843832] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:22:44,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:22:44,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 24 [2024-09-25 10:22:44,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323354396] [2024-09-25 10:22:44,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:22:44,935 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 10:22:44,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:44,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 10:22:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-09-25 10:22:44,936 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-25 10:22:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:45,056 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2024-09-25 10:22:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 10:22:45,057 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2024-09-25 10:22:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:45,058 INFO L225 Difference]: With dead ends: 54 [2024-09-25 10:22:45,058 INFO L226 Difference]: Without dead ends: 52 [2024-09-25 10:22:45,058 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-09-25 10:22:45,059 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:45,059 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 84 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:22:45,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-25 10:22:45,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-25 10:22:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:22:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2024-09-25 10:22:45,069 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 31 [2024-09-25 10:22:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:45,069 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2024-09-25 10:22:45,069 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-25 10:22:45,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:45,070 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2024-09-25 10:22:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-25 10:22:45,071 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:45,071 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:45,088 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-25 10:22:45,271 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:45,272 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:45,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:45,272 INFO L85 PathProgramCache]: Analyzing trace with hash -164723864, now seen corresponding path program 5 times [2024-09-25 10:22:45,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:45,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651025280] [2024-09-25 10:22:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:45,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:45,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:45,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 10:22:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:45,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:22:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:45,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:22:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:22:45,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:45,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651025280] [2024-09-25 10:22:45,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651025280] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:45,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454881583] [2024-09-25 10:22:45,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:22:45,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:45,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:45,681 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:22:45,682 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 10:22:45,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-25 10:22:45,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:22:45,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-25 10:22:45,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:22:45,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:22:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:22:46,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454881583] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:22:46,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:22:46,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2024-09-25 10:22:46,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916901784] [2024-09-25 10:22:46,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:22:46,415 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-25 10:22:46,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:46,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-25 10:22:46,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2024-09-25 10:22:46,417 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 31 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:22:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:47,024 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2024-09-25 10:22:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-25 10:22:47,025 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 38 [2024-09-25 10:22:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:47,026 INFO L225 Difference]: With dead ends: 97 [2024-09-25 10:22:47,026 INFO L226 Difference]: Without dead ends: 67 [2024-09-25 10:22:47,027 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=1535, Unknown=0, NotChecked=0, Total=1806 [2024-09-25 10:22:47,028 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:47,028 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 174 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:22:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-25 10:22:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-25 10:22:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 50 states have internal predecessors, (53), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:22:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2024-09-25 10:22:47,046 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 38 [2024-09-25 10:22:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:47,046 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2024-09-25 10:22:47,046 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:22:47,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2024-09-25 10:22:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-25 10:22:47,047 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:47,047 INFO L216 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:47,065 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-25 10:22:47,248 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:47,248 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:47,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1495655394, now seen corresponding path program 6 times [2024-09-25 10:22:47,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:47,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043354595] [2024-09-25 10:22:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:47,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:47,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:47,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:22:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:47,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:22:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:47,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:22:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 34 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:22:47,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:47,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043354595] [2024-09-25 10:22:47,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043354595] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:47,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911821745] [2024-09-25 10:22:47,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:22:47,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:47,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:47,541 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:22:47,542 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 10:22:47,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-25 10:22:47,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:22:47,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-25 10:22:47,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:22:47,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:22:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:22:48,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911821745] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:22:48,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:22:48,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2024-09-25 10:22:48,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744947401] [2024-09-25 10:22:48,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:22:48,105 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-25 10:22:48,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:48,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-25 10:22:48,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 10:22:48,107 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 39 states have internal predecessors, (58), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:22:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:48,456 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2024-09-25 10:22:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-25 10:22:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 39 states have internal predecessors, (58), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 43 [2024-09-25 10:22:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:48,461 INFO L225 Difference]: With dead ends: 120 [2024-09-25 10:22:48,461 INFO L226 Difference]: Without dead ends: 118 [2024-09-25 10:22:48,462 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=503, Invalid=1947, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 10:22:48,463 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:48,463 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 243 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:22:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-25 10:22:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2024-09-25 10:22:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 87 states have internal predecessors, (88), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (26), 21 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:22:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2024-09-25 10:22:48,494 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 43 [2024-09-25 10:22:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:48,494 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2024-09-25 10:22:48,494 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 39 states have internal predecessors, (58), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:22:48,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2024-09-25 10:22:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 10:22:48,500 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:48,500 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:48,518 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 10:22:48,704 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-25 10:22:48,705 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:48,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:48,705 INFO L85 PathProgramCache]: Analyzing trace with hash -560948602, now seen corresponding path program 7 times [2024-09-25 10:22:48,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:48,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652456679] [2024-09-25 10:22:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:48,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:49,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:49,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 10:22:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:49,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:22:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:49,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:22:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:49,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:22:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:22:49,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:49,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652456679] [2024-09-25 10:22:49,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652456679] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:49,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68646864] [2024-09-25 10:22:49,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:22:49,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:49,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:49,153 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:22:49,155 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 10:22:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:49,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-25 10:22:49,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:22:49,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:22:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:22:49,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68646864] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:22:49,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:22:49,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2024-09-25 10:22:49,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373942353] [2024-09-25 10:22:49,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:22:49,991 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-25 10:22:49,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:49,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-25 10:22:49,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 10:22:49,992 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 36 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:22:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:50,674 INFO L93 Difference]: Finished difference Result 176 states and 207 transitions. [2024-09-25 10:22:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-25 10:22:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 46 [2024-09-25 10:22:50,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:50,677 INFO L225 Difference]: With dead ends: 176 [2024-09-25 10:22:50,677 INFO L226 Difference]: Without dead ends: 139 [2024-09-25 10:22:50,678 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=2087, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 10:22:50,678 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:50,678 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 210 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:22:50,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-25 10:22:50,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2024-09-25 10:22:50,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 100 states have internal predecessors, (102), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:22:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2024-09-25 10:22:50,711 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 46 [2024-09-25 10:22:50,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:50,711 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2024-09-25 10:22:50,711 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:22:50,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2024-09-25 10:22:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-25 10:22:50,713 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:50,713 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:50,728 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-25 10:22:50,917 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-25 10:22:50,918 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:50,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:50,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1996799912, now seen corresponding path program 8 times [2024-09-25 10:22:50,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:50,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433543784] [2024-09-25 10:22:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:50,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:51,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:51,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 10:22:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:51,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:22:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:51,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:22:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:51,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:22:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:51,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:22:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:22:51,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:51,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433543784] [2024-09-25 10:22:51,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433543784] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:51,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129740768] [2024-09-25 10:22:51,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:22:51,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:51,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:51,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:22:51,472 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 10:22:51,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:22:51,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:22:51,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-25 10:22:51,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:22:51,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:22:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:22:52,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129740768] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:22:52,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:22:52,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 47 [2024-09-25 10:22:52,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190356671] [2024-09-25 10:22:52,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:22:52,618 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-25 10:22:52,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:52,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-25 10:22:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:22:52,620 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:22:53,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:53,417 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2024-09-25 10:22:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-25 10:22:53,418 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 54 [2024-09-25 10:22:53,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:53,419 INFO L225 Difference]: With dead ends: 197 [2024-09-25 10:22:53,419 INFO L226 Difference]: Without dead ends: 153 [2024-09-25 10:22:53,421 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=589, Invalid=3571, Unknown=0, NotChecked=0, Total=4160 [2024-09-25 10:22:53,422 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:53,422 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:22:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-25 10:22:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2024-09-25 10:22:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 111 states have internal predecessors, (114), 34 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (33), 28 states have call predecessors, (33), 33 states have call successors, (33) [2024-09-25 10:22:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 181 transitions. [2024-09-25 10:22:53,450 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 181 transitions. Word has length 54 [2024-09-25 10:22:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:53,450 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 181 transitions. [2024-09-25 10:22:53,450 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:22:53,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 181 transitions. [2024-09-25 10:22:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-25 10:22:53,452 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:53,452 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:53,468 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 10:22:53,656 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:53,657 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:53,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:53,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1940245062, now seen corresponding path program 9 times [2024-09-25 10:22:53,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:53,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350012938] [2024-09-25 10:22:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:53,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:54,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:54,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:22:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:54,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:22:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:54,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:22:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:54,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:22:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:54,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:22:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:54,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:22:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:22:54,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:54,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350012938] [2024-09-25 10:22:54,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350012938] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:54,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203464011] [2024-09-25 10:22:54,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:22:54,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:54,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:54,296 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:22:54,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 10:22:54,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-25 10:22:54,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:22:54,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:22:54,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:22:54,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:22:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:22:55,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203464011] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:22:55,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:22:55,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 46 [2024-09-25 10:22:55,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293610744] [2024-09-25 10:22:55,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:22:55,379 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-25 10:22:55,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:55,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-25 10:22:55,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1771, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 10:22:55,381 INFO L87 Difference]: Start difference. First operand 150 states and 181 transitions. Second operand has 46 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-25 10:22:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:56,503 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2024-09-25 10:22:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-25 10:22:56,505 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 62 [2024-09-25 10:22:56,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:56,508 INFO L225 Difference]: With dead ends: 215 [2024-09-25 10:22:56,508 INFO L226 Difference]: Without dead ends: 164 [2024-09-25 10:22:56,509 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=595, Invalid=3437, Unknown=0, NotChecked=0, Total=4032 [2024-09-25 10:22:56,511 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:56,511 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 298 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 10:22:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-09-25 10:22:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2024-09-25 10:22:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 115 states have (on average 1.0782608695652174) internal successors, (124), 120 states have internal predecessors, (124), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 30 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-25 10:22:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 195 transitions. [2024-09-25 10:22:56,557 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 195 transitions. Word has length 62 [2024-09-25 10:22:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:56,557 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 195 transitions. [2024-09-25 10:22:56,557 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-25 10:22:56,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 195 transitions. [2024-09-25 10:22:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-25 10:22:56,559 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:56,559 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:56,577 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-25 10:22:56,759 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 10:22:56,760 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:22:56,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:56,761 INFO L85 PathProgramCache]: Analyzing trace with hash 391515112, now seen corresponding path program 10 times [2024-09-25 10:22:56,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:22:56,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003975416] [2024-09-25 10:22:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:22:56,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:22:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:57,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:22:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:57,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 10:22:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:57,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:22:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:57,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:22:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:57,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:22:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:57,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:22:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:57,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:22:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:57,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:22:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:22:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 65 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:22:57,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:22:57,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003975416] [2024-09-25 10:22:57,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003975416] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:22:57,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303184706] [2024-09-25 10:22:57,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:22:57,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:22:57,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:22:57,388 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:22:57,390 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 10:22:57,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:22:57,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:22:57,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-25 10:22:57,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:22:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:22:57,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:22:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:22:58,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303184706] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:22:58,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:22:58,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 51 [2024-09-25 10:22:58,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386784341] [2024-09-25 10:22:58,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:22:58,643 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-25 10:22:58,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:22:58,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-25 10:22:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 10:22:58,645 INFO L87 Difference]: Start difference. First operand 162 states and 195 transitions. Second operand has 51 states, 50 states have (on average 1.6) internal successors, (80), 49 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:22:59,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:22:59,928 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2024-09-25 10:22:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-25 10:22:59,929 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.6) internal successors, (80), 49 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 70 [2024-09-25 10:22:59,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:22:59,930 INFO L225 Difference]: With dead ends: 230 [2024-09-25 10:22:59,930 INFO L226 Difference]: Without dead ends: 172 [2024-09-25 10:22:59,932 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=735, Invalid=4235, Unknown=0, NotChecked=0, Total=4970 [2024-09-25 10:22:59,932 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:22:59,933 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 336 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 10:22:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-25 10:22:59,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-25 10:22:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 121 states have (on average 1.0826446280991735) internal successors, (131), 127 states have internal predecessors, (131), 38 states have call successors, (38), 11 states have call predecessors, (38), 10 states have return successors, (37), 31 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-25 10:22:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 206 transitions. [2024-09-25 10:22:59,968 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 206 transitions. Word has length 70 [2024-09-25 10:22:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:22:59,968 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 206 transitions. [2024-09-25 10:22:59,968 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.6) internal successors, (80), 49 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:22:59,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:22:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 206 transitions. [2024-09-25 10:22:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-25 10:22:59,970 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:22:59,970 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:22:59,983 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-25 10:23:00,170 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 10:23:00,170 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:00,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:00,171 INFO L85 PathProgramCache]: Analyzing trace with hash 96856582, now seen corresponding path program 11 times [2024-09-25 10:23:00,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:00,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156555431] [2024-09-25 10:23:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:00,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:00,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:00,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:23:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:00,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:23:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:00,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:23:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:00,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:23:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:00,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:23:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:00,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:23:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:00,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:23:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:00,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:23:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 86 proven. 75 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:00,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:00,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156555431] [2024-09-25 10:23:00,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156555431] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:00,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46210684] [2024-09-25 10:23:00,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:23:00,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:00,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:00,917 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:00,918 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 10:23:00,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-25 10:23:00,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:00,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-25 10:23:00,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:01,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:02,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46210684] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:02,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:02,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 56 [2024-09-25 10:23:02,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28822426] [2024-09-25 10:23:02,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:02,383 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-25 10:23:02,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:02,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-25 10:23:02,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:23:02,384 INFO L87 Difference]: Start difference. First operand 170 states and 206 transitions. Second operand has 56 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-25 10:23:03,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:03,948 INFO L93 Difference]: Finished difference Result 262 states and 310 transitions. [2024-09-25 10:23:03,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-25 10:23:03,949 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 78 [2024-09-25 10:23:03,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:03,951 INFO L225 Difference]: With dead ends: 262 [2024-09-25 10:23:03,951 INFO L226 Difference]: Without dead ends: 201 [2024-09-25 10:23:03,953 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=891, Invalid=5115, Unknown=0, NotChecked=0, Total=6006 [2024-09-25 10:23:03,953 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:03,954 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 461 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 10:23:03,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-25 10:23:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2024-09-25 10:23:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 142 states have (on average 1.0774647887323943) internal successors, (153), 148 states have internal predecessors, (153), 46 states have call successors, (46), 12 states have call predecessors, (46), 11 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-25 10:23:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2024-09-25 10:23:03,996 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 78 [2024-09-25 10:23:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:03,996 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2024-09-25 10:23:03,997 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-25 10:23:03,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2024-09-25 10:23:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-25 10:23:03,998 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:03,998 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:04,015 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:04,199 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-25 10:23:04,199 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:04,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:04,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1215928280, now seen corresponding path program 12 times [2024-09-25 10:23:04,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:04,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586851997] [2024-09-25 10:23:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:04,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:23:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:23:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:23:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:23:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:23:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:23:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:23:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:23:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:23:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 110 proven. 89 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:23:04,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:04,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586851997] [2024-09-25 10:23:05,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586851997] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:05,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441981397] [2024-09-25 10:23:05,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:23:05,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:05,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:05,002 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:05,004 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 10:23:05,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-25 10:23:05,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:05,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-25 10:23:05,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 29 proven. 194 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-25 10:23:05,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 29 proven. 194 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-25 10:23:07,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441981397] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:07,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:07,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 28] total 75 [2024-09-25 10:23:07,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929232592] [2024-09-25 10:23:07,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:07,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-25 10:23:07,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:07,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-25 10:23:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=5023, Unknown=0, NotChecked=0, Total=5550 [2024-09-25 10:23:07,319 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand has 75 states, 74 states have (on average 1.5) internal successors, (111), 72 states have internal predecessors, (111), 29 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:23:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:09,818 INFO L93 Difference]: Finished difference Result 256 states and 299 transitions. [2024-09-25 10:23:09,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-25 10:23:09,819 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.5) internal successors, (111), 72 states have internal predecessors, (111), 29 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 86 [2024-09-25 10:23:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:09,821 INFO L225 Difference]: With dead ends: 256 [2024-09-25 10:23:09,821 INFO L226 Difference]: Without dead ends: 184 [2024-09-25 10:23:09,823 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1096, Invalid=10034, Unknown=0, NotChecked=0, Total=11130 [2024-09-25 10:23:09,823 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:09,824 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 534 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 10:23:09,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-25 10:23:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-09-25 10:23:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 131 states have (on average 1.0763358778625953) internal successors, (141), 137 states have internal predecessors, (141), 42 states have call successors, (42), 11 states have call predecessors, (42), 10 states have return successors, (41), 35 states have call predecessors, (41), 41 states have call successors, (41) [2024-09-25 10:23:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 224 transitions. [2024-09-25 10:23:09,884 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 224 transitions. Word has length 86 [2024-09-25 10:23:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:09,884 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 224 transitions. [2024-09-25 10:23:09,884 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.5) internal successors, (111), 72 states have internal predecessors, (111), 29 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:23:09,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 224 transitions. [2024-09-25 10:23:09,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-25 10:23:09,886 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:09,886 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:09,898 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:10,086 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-25 10:23:10,087 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:10,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1932610338, now seen corresponding path program 13 times [2024-09-25 10:23:10,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:10,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099063426] [2024-09-25 10:23:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:10,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:23:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:23:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:23:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:23:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:23:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:23:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:23:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:23:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:23:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 63 proven. 147 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:23:10,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:10,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099063426] [2024-09-25 10:23:10,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099063426] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:10,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050595088] [2024-09-25 10:23:10,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:23:10,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:10,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:10,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:10,566 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 10:23:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:23:10,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 18 proven. 192 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:23:10,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 18 proven. 192 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:23:11,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050595088] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:11,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:11,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-25 10:23:11,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137667950] [2024-09-25 10:23:11,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:11,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-25 10:23:11,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-25 10:23:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1977, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 10:23:11,341 INFO L87 Difference]: Start difference. First operand 184 states and 224 transitions. Second operand has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:11,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:11,667 INFO L93 Difference]: Finished difference Result 197 states and 238 transitions. [2024-09-25 10:23:11,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-25 10:23:11,668 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 87 [2024-09-25 10:23:11,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:11,669 INFO L225 Difference]: With dead ends: 197 [2024-09-25 10:23:11,670 INFO L226 Difference]: Without dead ends: 195 [2024-09-25 10:23:11,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 159 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=2937, Unknown=0, NotChecked=0, Total=3540 [2024-09-25 10:23:11,671 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:11,671 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 205 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:23:11,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-25 10:23:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2024-09-25 10:23:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 138 states have (on average 1.0724637681159421) internal successors, (148), 144 states have internal predecessors, (148), 44 states have call successors, (44), 12 states have call predecessors, (44), 11 states have return successors, (43), 37 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-25 10:23:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 235 transitions. [2024-09-25 10:23:11,701 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 235 transitions. Word has length 87 [2024-09-25 10:23:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:11,701 INFO L474 AbstractCegarLoop]: Abstraction has 194 states and 235 transitions. [2024-09-25 10:23:11,701 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:11,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 235 transitions. [2024-09-25 10:23:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-25 10:23:11,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:11,703 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:11,717 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:11,906 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:11,907 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:11,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:11,907 INFO L85 PathProgramCache]: Analyzing trace with hash 202176966, now seen corresponding path program 14 times [2024-09-25 10:23:11,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:11,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481452387] [2024-09-25 10:23:11,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:11,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:23:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:23:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:23:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:23:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:23:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:23:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:23:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:23:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:23:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:23:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 137 proven. 104 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:23:12,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:12,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481452387] [2024-09-25 10:23:12,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481452387] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:12,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441767081] [2024-09-25 10:23:12,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:23:12,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:12,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:12,795 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:12,796 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 10:23:12,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:23:12,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:12,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-25 10:23:12,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:23:13,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:23:15,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441767081] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:15,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:15,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 77 [2024-09-25 10:23:15,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381625341] [2024-09-25 10:23:15,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:15,051 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-09-25 10:23:15,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:15,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-09-25 10:23:15,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=5083, Unknown=0, NotChecked=0, Total=5852 [2024-09-25 10:23:15,053 INFO L87 Difference]: Start difference. First operand 194 states and 235 transitions. Second operand has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 75 states have internal predecessors, (115), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-25 10:23:17,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:17,309 INFO L93 Difference]: Finished difference Result 304 states and 362 transitions. [2024-09-25 10:23:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-09-25 10:23:17,310 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 75 states have internal predecessors, (115), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 94 [2024-09-25 10:23:17,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:17,312 INFO L225 Difference]: With dead ends: 304 [2024-09-25 10:23:17,312 INFO L226 Difference]: Without dead ends: 233 [2024-09-25 10:23:17,313 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3365 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1564, Invalid=9356, Unknown=0, NotChecked=0, Total=10920 [2024-09-25 10:23:17,313 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:17,314 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 526 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-25 10:23:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-09-25 10:23:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2024-09-25 10:23:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 165 states have (on average 1.0787878787878789) internal successors, (178), 171 states have internal predecessors, (178), 54 states have call successors, (54), 13 states have call predecessors, (54), 12 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-25 10:23:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 285 transitions. [2024-09-25 10:23:17,356 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 285 transitions. Word has length 94 [2024-09-25 10:23:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:17,356 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 285 transitions. [2024-09-25 10:23:17,357 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 75 states have internal predecessors, (115), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-25 10:23:17,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 285 transitions. [2024-09-25 10:23:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-09-25 10:23:17,358 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:17,358 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:17,375 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:17,559 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-25 10:23:17,559 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:17,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:17,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1191586712, now seen corresponding path program 15 times [2024-09-25 10:23:17,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:17,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504721895] [2024-09-25 10:23:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:17,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:23:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:23:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:23:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:23:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:23:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:23:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:23:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:23:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:23:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-25 10:23:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-25 10:23:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 167 proven. 120 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:23:18,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:18,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504721895] [2024-09-25 10:23:18,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504721895] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:18,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161745957] [2024-09-25 10:23:18,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:23:18,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:18,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:18,562 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:18,564 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-25 10:23:18,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-09-25 10:23:18,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:18,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-25 10:23:18,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:23:19,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:23:21,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161745957] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:21,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:21,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 83 [2024-09-25 10:23:21,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409428693] [2024-09-25 10:23:21,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:21,113 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-09-25 10:23:21,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:21,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-09-25 10:23:21,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=6014, Unknown=0, NotChecked=0, Total=6806 [2024-09-25 10:23:21,115 INFO L87 Difference]: Start difference. First operand 232 states and 285 transitions. Second operand has 83 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 81 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-25 10:23:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:23,393 INFO L93 Difference]: Finished difference Result 296 states and 348 transitions. [2024-09-25 10:23:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-25 10:23:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 81 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 102 [2024-09-25 10:23:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:23,395 INFO L225 Difference]: With dead ends: 296 [2024-09-25 10:23:23,395 INFO L226 Difference]: Without dead ends: 214 [2024-09-25 10:23:23,396 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 174 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1545, Invalid=12027, Unknown=0, NotChecked=0, Total=13572 [2024-09-25 10:23:23,397 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:23,397 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 436 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 10:23:23,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-09-25 10:23:23,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2024-09-25 10:23:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 152 states have (on average 1.0789473684210527) internal successors, (164), 158 states have internal predecessors, (164), 49 states have call successors, (49), 12 states have call predecessors, (49), 11 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2024-09-25 10:23:23,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 261 transitions. [2024-09-25 10:23:23,435 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 261 transitions. Word has length 102 [2024-09-25 10:23:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:23,435 INFO L474 AbstractCegarLoop]: Abstraction has 213 states and 261 transitions. [2024-09-25 10:23:23,435 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 81 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-25 10:23:23,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 261 transitions. [2024-09-25 10:23:23,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-25 10:23:23,437 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:23,437 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:23,455 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:23,638 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:23,638 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:23,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1669102750, now seen corresponding path program 16 times [2024-09-25 10:23:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:23,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879474468] [2024-09-25 10:23:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:23,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:23:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:23:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:23:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:23:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:23:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:23:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:23:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:23:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:23:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:23:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-25 10:23:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 88 proven. 212 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:23:24,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:24,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879474468] [2024-09-25 10:23:24,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879474468] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:24,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915635744] [2024-09-25 10:23:24,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:23:24,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:24,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:24,253 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:24,254 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-25 10:23:24,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:23:24,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:24,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-25 10:23:24,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 22 proven. 278 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:23:24,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 22 proven. 278 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:23:25,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915635744] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:25,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:25,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2024-09-25 10:23:25,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585683094] [2024-09-25 10:23:25,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:25,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-25 10:23:25,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:25,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-25 10:23:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2686, Unknown=0, NotChecked=0, Total=3192 [2024-09-25 10:23:25,229 INFO L87 Difference]: Start difference. First operand 213 states and 261 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:25,600 INFO L93 Difference]: Finished difference Result 226 states and 275 transitions. [2024-09-25 10:23:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-25 10:23:25,601 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 103 [2024-09-25 10:23:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:25,603 INFO L225 Difference]: With dead ends: 226 [2024-09-25 10:23:25,603 INFO L226 Difference]: Without dead ends: 224 [2024-09-25 10:23:25,603 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 191 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=815, Invalid=4015, Unknown=0, NotChecked=0, Total=4830 [2024-09-25 10:23:25,605 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:25,605 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 212 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:23:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-09-25 10:23:25,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2024-09-25 10:23:25,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 159 states have (on average 1.0754716981132075) internal successors, (171), 165 states have internal predecessors, (171), 51 states have call successors, (51), 13 states have call predecessors, (51), 12 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2024-09-25 10:23:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 272 transitions. [2024-09-25 10:23:25,656 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 272 transitions. Word has length 103 [2024-09-25 10:23:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:25,657 INFO L474 AbstractCegarLoop]: Abstraction has 223 states and 272 transitions. [2024-09-25 10:23:25,657 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:25,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 272 transitions. [2024-09-25 10:23:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-25 10:23:25,658 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:25,659 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:25,675 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-25 10:23:25,862 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:25,863 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:25,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:25,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1553398150, now seen corresponding path program 17 times [2024-09-25 10:23:25,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:25,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238606187] [2024-09-25 10:23:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:25,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:23:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:23:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:23:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:23:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:23:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:23:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:23:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:23:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:23:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:23:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-25 10:23:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-25 10:23:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 200 proven. 137 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:23:27,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:27,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238606187] [2024-09-25 10:23:27,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238606187] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:27,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277336121] [2024-09-25 10:23:27,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:23:27,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:27,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:27,057 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:27,058 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-25 10:23:27,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-25 10:23:27,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:27,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-25 10:23:27,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 53 proven. 317 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-09-25 10:23:28,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 53 proven. 317 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-09-25 10:23:30,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277336121] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:30,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:30,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 92 [2024-09-25 10:23:30,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136976063] [2024-09-25 10:23:30,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:30,111 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-09-25 10:23:30,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-09-25 10:23:30,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1049, Invalid=7323, Unknown=0, NotChecked=0, Total=8372 [2024-09-25 10:23:30,114 INFO L87 Difference]: Start difference. First operand 223 states and 272 transitions. Second operand has 92 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 90 states have internal predecessors, (138), 38 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-25 10:23:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:34,249 INFO L93 Difference]: Finished difference Result 348 states and 417 transitions. [2024-09-25 10:23:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-25 10:23:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 90 states have internal predecessors, (138), 38 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Word has length 110 [2024-09-25 10:23:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:34,252 INFO L225 Difference]: With dead ends: 348 [2024-09-25 10:23:34,252 INFO L226 Difference]: Without dead ends: 267 [2024-09-25 10:23:34,254 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5523 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2480, Invalid=15610, Unknown=0, NotChecked=0, Total=18090 [2024-09-25 10:23:34,254 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:34,255 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 619 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-25 10:23:34,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-25 10:23:34,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2024-09-25 10:23:34,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 190 states have (on average 1.0789473684210527) internal successors, (205), 196 states have internal predecessors, (205), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2024-09-25 10:23:34,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 330 transitions. [2024-09-25 10:23:34,328 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 330 transitions. Word has length 110 [2024-09-25 10:23:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:34,328 INFO L474 AbstractCegarLoop]: Abstraction has 267 states and 330 transitions. [2024-09-25 10:23:34,329 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 90 states have internal predecessors, (138), 38 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-25 10:23:34,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:34,329 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 330 transitions. [2024-09-25 10:23:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-25 10:23:34,331 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:34,331 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:34,349 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-25 10:23:34,532 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-25 10:23:34,533 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:34,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:34,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1041518760, now seen corresponding path program 18 times [2024-09-25 10:23:34,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:34,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734551097] [2024-09-25 10:23:34,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:34,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:23:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:23:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:23:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:23:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:23:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:23:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:23:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:23:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:23:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:23:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:23:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-25 10:23:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-25 10:23:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 236 proven. 155 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:23:35,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:35,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734551097] [2024-09-25 10:23:35,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734551097] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:35,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390758616] [2024-09-25 10:23:35,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:23:35,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:35,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:35,788 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:35,790 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-25 10:23:35,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-25 10:23:35,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:35,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-25 10:23:35,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:23:37,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:23:38,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390758616] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:38,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:38,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 95 [2024-09-25 10:23:38,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451217865] [2024-09-25 10:23:38,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:38,930 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-09-25 10:23:38,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-09-25 10:23:38,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=7771, Unknown=0, NotChecked=0, Total=8930 [2024-09-25 10:23:38,932 INFO L87 Difference]: Start difference. First operand 267 states and 330 transitions. Second operand has 95 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 93 states have internal predecessors, (142), 41 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-25 10:23:42,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:42,541 INFO L93 Difference]: Finished difference Result 383 states and 461 transitions. [2024-09-25 10:23:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-25 10:23:42,542 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 93 states have internal predecessors, (142), 41 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Word has length 118 [2024-09-25 10:23:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:42,544 INFO L225 Difference]: With dead ends: 383 [2024-09-25 10:23:42,544 INFO L226 Difference]: Without dead ends: 295 [2024-09-25 10:23:42,546 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5110 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2389, Invalid=14123, Unknown=0, NotChecked=0, Total=16512 [2024-09-25 10:23:42,546 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 2665 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:42,547 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 753 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2665 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-25 10:23:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-09-25 10:23:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 293. [2024-09-25 10:23:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 208 states have (on average 1.0769230769230769) internal successors, (224), 215 states have internal predecessors, (224), 71 states have call successors, (71), 14 states have call predecessors, (71), 13 states have return successors, (70), 63 states have call predecessors, (70), 70 states have call successors, (70) [2024-09-25 10:23:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 365 transitions. [2024-09-25 10:23:42,622 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 365 transitions. Word has length 118 [2024-09-25 10:23:42,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:42,622 INFO L474 AbstractCegarLoop]: Abstraction has 293 states and 365 transitions. [2024-09-25 10:23:42,622 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 93 states have internal predecessors, (142), 41 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-25 10:23:42,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:42,623 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 365 transitions. [2024-09-25 10:23:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-25 10:23:42,624 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:42,625 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:42,641 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:42,825 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:42,825 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:42,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:42,826 INFO L85 PathProgramCache]: Analyzing trace with hash -327161530, now seen corresponding path program 19 times [2024-09-25 10:23:42,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:42,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097821579] [2024-09-25 10:23:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:42,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:23:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:23:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:23:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:23:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:23:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:23:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:23:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:23:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:23:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:23:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:23:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:23:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-09-25 10:23:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-09-25 10:23:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 275 proven. 174 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:23:44,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:44,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097821579] [2024-09-25 10:23:44,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097821579] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:44,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750710309] [2024-09-25 10:23:44,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:23:44,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:44,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:44,099 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:44,100 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-25 10:23:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-25 10:23:44,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:23:44,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:23:46,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750710309] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:46,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:46,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 86 [2024-09-25 10:23:46,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000801080] [2024-09-25 10:23:46,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:46,918 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-25 10:23:46,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:46,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-25 10:23:46,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=6287, Unknown=0, NotChecked=0, Total=7310 [2024-09-25 10:23:46,920 INFO L87 Difference]: Start difference. First operand 293 states and 365 transitions. Second operand has 86 states, 85 states have (on average 1.6) internal successors, (136), 84 states have internal predecessors, (136), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-25 10:23:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:50,963 INFO L93 Difference]: Finished difference Result 433 states and 526 transitions. [2024-09-25 10:23:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-09-25 10:23:50,964 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.6) internal successors, (136), 84 states have internal predecessors, (136), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Word has length 126 [2024-09-25 10:23:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:50,966 INFO L225 Difference]: With dead ends: 433 [2024-09-25 10:23:50,967 INFO L226 Difference]: Without dead ends: 342 [2024-09-25 10:23:50,968 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 231 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2163, Invalid=12117, Unknown=0, NotChecked=0, Total=14280 [2024-09-25 10:23:50,968 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:50,969 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 886 Invalid, 3115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3004 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-25 10:23:50,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-09-25 10:23:51,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2024-09-25 10:23:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 241 states have (on average 1.070539419087137) internal successors, (258), 248 states have internal predecessors, (258), 85 states have call successors, (85), 15 states have call predecessors, (85), 14 states have return successors, (84), 77 states have call predecessors, (84), 84 states have call successors, (84) [2024-09-25 10:23:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 427 transitions. [2024-09-25 10:23:51,048 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 427 transitions. Word has length 126 [2024-09-25 10:23:51,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:51,049 INFO L474 AbstractCegarLoop]: Abstraction has 341 states and 427 transitions. [2024-09-25 10:23:51,049 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.6) internal successors, (136), 84 states have internal predecessors, (136), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-25 10:23:51,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 427 transitions. [2024-09-25 10:23:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-09-25 10:23:51,051 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:51,051 INFO L216 NwaCegarLoop]: trace histogram [27, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:51,069 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-25 10:23:51,252 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-25 10:23:51,253 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:51,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1728201798, now seen corresponding path program 20 times [2024-09-25 10:23:51,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:51,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329800514] [2024-09-25 10:23:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:51,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:23:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:23:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:23:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:23:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:23:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:23:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:23:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:23:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-25 10:23:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-25 10:23:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-25 10:23:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2024-09-25 10:23:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 349 proven. 275 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:23:52,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:52,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329800514] [2024-09-25 10:23:52,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329800514] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:52,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004570281] [2024-09-25 10:23:52,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:23:52,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:52,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:52,309 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:52,310 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-25 10:23:52,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:23:52,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:52,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-25 10:23:52,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 24 proven. 600 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:23:53,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 24 proven. 600 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:23:54,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004570281] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:54,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:54,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 113 [2024-09-25 10:23:54,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98201311] [2024-09-25 10:23:54,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:54,667 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-09-25 10:23:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-09-25 10:23:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2594, Invalid=10062, Unknown=0, NotChecked=0, Total=12656 [2024-09-25 10:23:54,668 INFO L87 Difference]: Start difference. First operand 341 states and 427 transitions. Second operand has 113 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 111 states have internal predecessors, (148), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-25 10:23:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:55,937 INFO L93 Difference]: Finished difference Result 762 states and 985 transitions. [2024-09-25 10:23:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-25 10:23:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 111 states have internal predecessors, (148), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 124 [2024-09-25 10:23:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:55,942 INFO L225 Difference]: With dead ends: 762 [2024-09-25 10:23:55,942 INFO L226 Difference]: Without dead ends: 760 [2024-09-25 10:23:55,944 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6964 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4040, Invalid=15420, Unknown=0, NotChecked=0, Total=19460 [2024-09-25 10:23:55,944 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 49 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:55,944 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1086 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 10:23:55,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2024-09-25 10:23:56,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 759. [2024-09-25 10:23:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 520 states have (on average 1.0326923076923078) internal successors, (537), 534 states have internal predecessors, (537), 223 states have call successors, (223), 16 states have call predecessors, (223), 15 states have return successors, (222), 208 states have call predecessors, (222), 222 states have call successors, (222) [2024-09-25 10:23:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 982 transitions. [2024-09-25 10:23:56,127 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 982 transitions. Word has length 124 [2024-09-25 10:23:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:56,127 INFO L474 AbstractCegarLoop]: Abstraction has 759 states and 982 transitions. [2024-09-25 10:23:56,128 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 111 states have internal predecessors, (148), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-25 10:23:56,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 982 transitions. [2024-09-25 10:23:56,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-25 10:23:56,131 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:56,131 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:56,149 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-25 10:23:56,332 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-25 10:23:56,333 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:56,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:56,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1782177000, now seen corresponding path program 21 times [2024-09-25 10:23:56,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:56,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497751840] [2024-09-25 10:23:56,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:56,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:23:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:23:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:23:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:23:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:23:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:23:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:23:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:23:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:23:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:23:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:23:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:23:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:23:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-25 10:23:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-25 10:23:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 317 proven. 194 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:23:57,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:57,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497751840] [2024-09-25 10:23:57,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497751840] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:57,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635576680] [2024-09-25 10:23:57,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:23:57,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:57,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:57,972 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:57,973 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-25 10:23:58,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-25 10:23:58,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:58,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-25 10:23:58,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:23:59,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:24:01,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635576680] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:01,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:01,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 107 [2024-09-25 10:24:01,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887829756] [2024-09-25 10:24:01,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:01,881 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2024-09-25 10:24:01,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:01,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2024-09-25 10:24:01,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1300, Invalid=10042, Unknown=0, NotChecked=0, Total=11342 [2024-09-25 10:24:01,883 INFO L87 Difference]: Start difference. First operand 759 states and 982 transitions. Second operand has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 47 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-25 10:24:05,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:05,914 INFO L93 Difference]: Finished difference Result 812 states and 1026 transitions. [2024-09-25 10:24:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-25 10:24:05,915 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 47 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Word has length 134 [2024-09-25 10:24:05,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:05,919 INFO L225 Difference]: With dead ends: 812 [2024-09-25 10:24:05,920 INFO L226 Difference]: Without dead ends: 710 [2024-09-25 10:24:05,922 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5884 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2595, Invalid=20661, Unknown=0, NotChecked=0, Total=23256 [2024-09-25 10:24:05,922 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:05,922 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 621 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 10:24:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2024-09-25 10:24:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 710. [2024-09-25 10:24:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 487 states have (on average 1.0328542094455853) internal successors, (503), 500 states have internal predecessors, (503), 208 states have call successors, (208), 15 states have call predecessors, (208), 14 states have return successors, (207), 194 states have call predecessors, (207), 207 states have call successors, (207) [2024-09-25 10:24:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 918 transitions. [2024-09-25 10:24:06,077 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 918 transitions. Word has length 134 [2024-09-25 10:24:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:06,077 INFO L474 AbstractCegarLoop]: Abstraction has 710 states and 918 transitions. [2024-09-25 10:24:06,077 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 47 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-25 10:24:06,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 918 transitions. [2024-09-25 10:24:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-25 10:24:06,081 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:06,081 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:06,097 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-25 10:24:06,281 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-25 10:24:06,282 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:06,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:06,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1880897274, now seen corresponding path program 22 times [2024-09-25 10:24:06,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:06,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54097504] [2024-09-25 10:24:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:06,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:24:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:24:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:24:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:24:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:24:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:24:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:24:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:24:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:24:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:24:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:24:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:24:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:24:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:24:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-25 10:24:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-25 10:24:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 362 proven. 215 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-25 10:24:07,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:07,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54097504] [2024-09-25 10:24:07,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54097504] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:07,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104414123] [2024-09-25 10:24:07,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:24:07,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:07,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:07,804 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:07,806 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-25 10:24:07,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:24:07,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:07,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-25 10:24:07,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-25 10:24:08,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-25 10:24:11,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104414123] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:11,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:11,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 96 [2024-09-25 10:24:11,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205288101] [2024-09-25 10:24:11,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:11,155 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-09-25 10:24:11,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:11,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-09-25 10:24:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=7846, Unknown=0, NotChecked=0, Total=9120 [2024-09-25 10:24:11,157 INFO L87 Difference]: Start difference. First operand 710 states and 918 transitions. Second operand has 96 states, 95 states have (on average 1.6) internal successors, (152), 94 states have internal predecessors, (152), 50 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-25 10:24:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:16,447 INFO L93 Difference]: Finished difference Result 889 states and 1127 transitions. [2024-09-25 10:24:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-09-25 10:24:16,448 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.6) internal successors, (152), 94 states have internal predecessors, (152), 50 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Word has length 142 [2024-09-25 10:24:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:16,452 INFO L225 Difference]: With dead ends: 889 [2024-09-25 10:24:16,452 INFO L226 Difference]: Without dead ends: 788 [2024-09-25 10:24:16,453 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2715, Invalid=15107, Unknown=0, NotChecked=0, Total=17822 [2024-09-25 10:24:16,454 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 3766 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 3929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 3766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:16,454 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1023 Invalid, 3929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 3766 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-25 10:24:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2024-09-25 10:24:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 778. [2024-09-25 10:24:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 534 states have (on average 1.0355805243445693) internal successors, (553), 547 states have internal predecessors, (553), 228 states have call successors, (228), 16 states have call predecessors, (228), 15 states have return successors, (227), 214 states have call predecessors, (227), 227 states have call successors, (227) [2024-09-25 10:24:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1008 transitions. [2024-09-25 10:24:16,640 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1008 transitions. Word has length 142 [2024-09-25 10:24:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:16,640 INFO L474 AbstractCegarLoop]: Abstraction has 778 states and 1008 transitions. [2024-09-25 10:24:16,640 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.6) internal successors, (152), 94 states have internal predecessors, (152), 50 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-25 10:24:16,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1008 transitions. [2024-09-25 10:24:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-09-25 10:24:16,645 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:16,645 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:16,663 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-25 10:24:16,846 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-25 10:24:16,846 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:16,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:16,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1580304088, now seen corresponding path program 23 times [2024-09-25 10:24:16,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:16,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750868881] [2024-09-25 10:24:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:16,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:24:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:24:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:24:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:24:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:24:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:24:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:24:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:24:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:24:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-25 10:24:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-25 10:24:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-25 10:24:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:24:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-25 10:24:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-25 10:24:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-09-25 10:24:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-25 10:24:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 410 proven. 237 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-25 10:24:18,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:18,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750868881] [2024-09-25 10:24:18,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750868881] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:18,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156017681] [2024-09-25 10:24:18,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:24:18,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:18,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:18,427 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:18,428 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-25 10:24:18,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-25 10:24:18,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:18,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-09-25 10:24:18,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 57 proven. 638 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-09-25 10:24:20,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 57 proven. 638 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-09-25 10:24:23,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156017681] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:23,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:23,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 122 [2024-09-25 10:24:23,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527478533] [2024-09-25 10:24:23,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:23,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-09-25 10:24:23,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-09-25 10:24:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=12916, Unknown=0, NotChecked=0, Total=14762 [2024-09-25 10:24:23,318 INFO L87 Difference]: Start difference. First operand 778 states and 1008 transitions. Second operand has 122 states, 121 states have (on average 1.512396694214876) internal successors, (183), 120 states have internal predecessors, (183), 53 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-25 10:24:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:31,106 INFO L93 Difference]: Finished difference Result 915 states and 1163 transitions. [2024-09-25 10:24:31,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-09-25 10:24:31,107 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 1.512396694214876) internal successors, (183), 120 states have internal predecessors, (183), 53 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) Word has length 150 [2024-09-25 10:24:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:31,110 INFO L225 Difference]: With dead ends: 915 [2024-09-25 10:24:31,110 INFO L226 Difference]: Without dead ends: 807 [2024-09-25 10:24:31,112 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10129 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=4440, Invalid=27780, Unknown=0, NotChecked=0, Total=32220 [2024-09-25 10:24:31,113 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 4426 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 4588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 4426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:31,113 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1064 Invalid, 4588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 4426 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-25 10:24:31,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2024-09-25 10:24:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2024-09-25 10:24:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 554 states have (on average 1.036101083032491) internal successors, (574), 567 states have internal predecessors, (574), 237 states have call successors, (237), 16 states have call predecessors, (237), 15 states have return successors, (236), 223 states have call predecessors, (236), 236 states have call successors, (236) [2024-09-25 10:24:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1047 transitions. [2024-09-25 10:24:31,346 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1047 transitions. Word has length 150 [2024-09-25 10:24:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:31,346 INFO L474 AbstractCegarLoop]: Abstraction has 807 states and 1047 transitions. [2024-09-25 10:24:31,346 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 1.512396694214876) internal successors, (183), 120 states have internal predecessors, (183), 53 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-25 10:24:31,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1047 transitions. [2024-09-25 10:24:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-09-25 10:24:31,350 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:31,350 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:31,367 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:31,550 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:31,551 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:31,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:31,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1176594234, now seen corresponding path program 24 times [2024-09-25 10:24:31,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:31,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349914511] [2024-09-25 10:24:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:31,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:24:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:24:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:24:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:24:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:24:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:24:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:24:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:24:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-25 10:24:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-25 10:24:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-25 10:24:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-25 10:24:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2024-09-25 10:24:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-25 10:24:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-09-25 10:24:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-09-25 10:24:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-09-25 10:24:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2024-09-25 10:24:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 461 proven. 260 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-25 10:24:33,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:33,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349914511] [2024-09-25 10:24:33,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349914511] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:33,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11809187] [2024-09-25 10:24:33,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:24:33,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:33,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:33,227 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:33,228 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-25 10:24:33,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-25 10:24:33,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:33,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-25 10:24:33,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 36 proven. 685 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-25 10:24:34,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 36 proven. 685 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-25 10:24:37,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11809187] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:37,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:37,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 106 [2024-09-25 10:24:37,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817240627] [2024-09-25 10:24:37,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:37,238 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-09-25 10:24:37,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:37,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-09-25 10:24:37,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1553, Invalid=9577, Unknown=0, NotChecked=0, Total=11130 [2024-09-25 10:24:37,240 INFO L87 Difference]: Start difference. First operand 807 states and 1047 transitions. Second operand has 106 states, 105 states have (on average 1.6) internal successors, (168), 104 states have internal predecessors, (168), 56 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-09-25 10:24:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:43,797 INFO L93 Difference]: Finished difference Result 956 states and 1213 transitions. [2024-09-25 10:24:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-25 10:24:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.6) internal successors, (168), 104 states have internal predecessors, (168), 56 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Word has length 158 [2024-09-25 10:24:43,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:43,803 INFO L225 Difference]: With dead ends: 956 [2024-09-25 10:24:43,804 INFO L226 Difference]: Without dead ends: 845 [2024-09-25 10:24:43,806 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3331, Invalid=18425, Unknown=0, NotChecked=0, Total=21756 [2024-09-25 10:24:43,806 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 4680 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 4877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 4680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:43,807 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1352 Invalid, 4877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 4680 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-25 10:24:43,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2024-09-25 10:24:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 837. [2024-09-25 10:24:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 575 states have (on average 1.0365217391304349) internal successors, (596), 588 states have internal predecessors, (596), 245 states have call successors, (245), 17 states have call predecessors, (245), 16 states have return successors, (244), 231 states have call predecessors, (244), 244 states have call successors, (244) [2024-09-25 10:24:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1085 transitions. [2024-09-25 10:24:44,072 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1085 transitions. Word has length 158 [2024-09-25 10:24:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:44,073 INFO L474 AbstractCegarLoop]: Abstraction has 837 states and 1085 transitions. [2024-09-25 10:24:44,073 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.6) internal successors, (168), 104 states have internal predecessors, (168), 56 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-09-25 10:24:44,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1085 transitions. [2024-09-25 10:24:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-09-25 10:24:44,077 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:44,077 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:44,095 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-25 10:24:44,277 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-25 10:24:44,278 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:44,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash -902421144, now seen corresponding path program 25 times [2024-09-25 10:24:44,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:44,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539692265] [2024-09-25 10:24:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:44,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:24:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-25 10:24:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-25 10:24:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-25 10:24:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2024-09-25 10:24:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2024-09-25 10:24:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-09-25 10:24:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2024-09-25 10:24:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-09-25 10:24:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2024-09-25 10:24:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2024-09-25 10:24:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 515 proven. 284 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-25 10:24:46,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:46,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539692265] [2024-09-25 10:24:46,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539692265] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:46,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293717560] [2024-09-25 10:24:46,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:24:46,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:46,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:46,084 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:46,085 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-25 10:24:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-25 10:24:46,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 38 proven. 761 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-25 10:24:47,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 38 proven. 761 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-25 10:24:50,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293717560] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:50,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:50,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 111 [2024-09-25 10:24:50,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313643620] [2024-09-25 10:24:50,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:50,432 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-25 10:24:50,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:50,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-25 10:24:50,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1703, Invalid=10507, Unknown=0, NotChecked=0, Total=12210 [2024-09-25 10:24:50,434 INFO L87 Difference]: Start difference. First operand 837 states and 1085 transitions. Second operand has 111 states, 110 states have (on average 1.6) internal successors, (176), 109 states have internal predecessors, (176), 59 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2024-09-25 10:24:57,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:57,542 INFO L93 Difference]: Finished difference Result 989 states and 1253 transitions. [2024-09-25 10:24:57,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-09-25 10:24:57,543 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 1.6) internal successors, (176), 109 states have internal predecessors, (176), 59 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) Word has length 166 [2024-09-25 10:24:57,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:57,549 INFO L225 Difference]: With dead ends: 989 [2024-09-25 10:24:57,549 INFO L226 Difference]: Without dead ends: 871 [2024-09-25 10:24:57,551 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 306 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6357 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=3663, Invalid=20207, Unknown=0, NotChecked=0, Total=23870 [2024-09-25 10:24:57,551 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 4709 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 4927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 4709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:57,551 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1220 Invalid, 4927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 4709 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-25 10:24:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2024-09-25 10:24:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 864. [2024-09-25 10:24:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 594 states have (on average 1.037037037037037) internal successors, (616), 607 states have internal predecessors, (616), 252 states have call successors, (252), 18 states have call predecessors, (252), 17 states have return successors, (251), 238 states have call predecessors, (251), 251 states have call successors, (251) [2024-09-25 10:24:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1119 transitions. [2024-09-25 10:24:57,802 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1119 transitions. Word has length 166 [2024-09-25 10:24:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:57,802 INFO L474 AbstractCegarLoop]: Abstraction has 864 states and 1119 transitions. [2024-09-25 10:24:57,803 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 1.6) internal successors, (176), 109 states have internal predecessors, (176), 59 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2024-09-25 10:24:57,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1119 transitions. [2024-09-25 10:24:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-09-25 10:24:57,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:57,807 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:57,825 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-25 10:24:58,008 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-25 10:24:58,008 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:58,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:58,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1015830662, now seen corresponding path program 26 times [2024-09-25 10:24:58,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:58,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379881912] [2024-09-25 10:24:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:58,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-25 10:24:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-25 10:24:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-09-25 10:24:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-09-25 10:24:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2024-09-25 10:24:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2024-09-25 10:24:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2024-09-25 10:24:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2024-09-25 10:24:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2024-09-25 10:24:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2024-09-25 10:25:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 572 proven. 309 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-25 10:25:00,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:00,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379881912] [2024-09-25 10:25:00,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379881912] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:00,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936092313] [2024-09-25 10:25:00,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:25:00,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:00,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:00,006 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:00,006 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-25 10:25:00,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:25:00,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:00,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-09-25 10:25:00,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 40 proven. 841 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-25 10:25:01,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 40 proven. 841 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-25 10:25:04,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936092313] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:04,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:04,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 116 [2024-09-25 10:25:04,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868242499] [2024-09-25 10:25:04,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:04,705 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-09-25 10:25:04,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:04,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-09-25 10:25:04,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1860, Invalid=11480, Unknown=0, NotChecked=0, Total=13340 [2024-09-25 10:25:04,707 INFO L87 Difference]: Start difference. First operand 864 states and 1119 transitions. Second operand has 116 states, 115 states have (on average 1.6) internal successors, (184), 114 states have internal predecessors, (184), 62 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-09-25 10:25:12,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:12,457 INFO L93 Difference]: Finished difference Result 1019 states and 1289 transitions. [2024-09-25 10:25:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-09-25 10:25:12,458 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.6) internal successors, (184), 114 states have internal predecessors, (184), 62 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Word has length 174 [2024-09-25 10:25:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:12,462 INFO L225 Difference]: With dead ends: 1019 [2024-09-25 10:25:12,462 INFO L226 Difference]: Without dead ends: 894 [2024-09-25 10:25:12,463 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6957 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=4011, Invalid=22071, Unknown=0, NotChecked=0, Total=26082 [2024-09-25 10:25:12,464 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 4929 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 5147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 4929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:12,464 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1344 Invalid, 5147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 4929 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-25 10:25:12,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2024-09-25 10:25:12,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 888. [2024-09-25 10:25:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 611 states have (on average 1.0376432078559739) internal successors, (634), 624 states have internal predecessors, (634), 258 states have call successors, (258), 19 states have call predecessors, (258), 18 states have return successors, (257), 244 states have call predecessors, (257), 257 states have call successors, (257) [2024-09-25 10:25:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1149 transitions. [2024-09-25 10:25:12,751 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1149 transitions. Word has length 174 [2024-09-25 10:25:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:12,751 INFO L474 AbstractCegarLoop]: Abstraction has 888 states and 1149 transitions. [2024-09-25 10:25:12,752 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.6) internal successors, (184), 114 states have internal predecessors, (184), 62 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-09-25 10:25:12,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1149 transitions. [2024-09-25 10:25:12,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-09-25 10:25:12,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:12,754 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:12,767 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:12,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:12,955 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:12,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:12,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1982537304, now seen corresponding path program 27 times [2024-09-25 10:25:12,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:12,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972779051] [2024-09-25 10:25:12,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:12,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:25:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:25:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:25:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:25:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:25:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-09-25 10:25:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-09-25 10:25:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2024-09-25 10:25:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2024-09-25 10:25:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-25 10:25:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2024-09-25 10:25:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2024-09-25 10:25:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2024-09-25 10:25:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2024-09-25 10:25:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2024-09-25 10:25:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 632 proven. 335 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-25 10:25:15,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:15,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972779051] [2024-09-25 10:25:15,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972779051] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:15,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051781917] [2024-09-25 10:25:15,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:25:15,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:15,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:15,059 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:15,060 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-25 10:25:15,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-25 10:25:15,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:15,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-09-25 10:25:15,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 42 proven. 925 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-25 10:25:16,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 42 proven. 925 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-25 10:25:20,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051781917] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:20,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:20,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 121 [2024-09-25 10:25:20,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516865153] [2024-09-25 10:25:20,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:20,078 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-09-25 10:25:20,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-09-25 10:25:20,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=12496, Unknown=0, NotChecked=0, Total=14520 [2024-09-25 10:25:20,081 INFO L87 Difference]: Start difference. First operand 888 states and 1149 transitions. Second operand has 121 states, 120 states have (on average 1.6) internal successors, (192), 119 states have internal predecessors, (192), 65 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2024-09-25 10:25:28,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:28,764 INFO L93 Difference]: Finished difference Result 1042 states and 1318 transitions. [2024-09-25 10:25:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-09-25 10:25:28,765 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 120 states have (on average 1.6) internal successors, (192), 119 states have internal predecessors, (192), 65 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) Word has length 182 [2024-09-25 10:25:28,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:28,769 INFO L225 Difference]: With dead ends: 1042 [2024-09-25 10:25:28,769 INFO L226 Difference]: Without dead ends: 910 [2024-09-25 10:25:28,771 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7488 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=4375, Invalid=24017, Unknown=0, NotChecked=0, Total=28392 [2024-09-25 10:25:28,771 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 5629 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 5868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 5629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:28,771 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1452 Invalid, 5868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 5629 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-25 10:25:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2024-09-25 10:25:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 905. [2024-09-25 10:25:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 623 states have (on average 1.0385232744783306) internal successors, (647), 636 states have internal predecessors, (647), 263 states have call successors, (263), 19 states have call predecessors, (263), 18 states have return successors, (262), 249 states have call predecessors, (262), 262 states have call successors, (262) [2024-09-25 10:25:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1172 transitions. [2024-09-25 10:25:29,090 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1172 transitions. Word has length 182 [2024-09-25 10:25:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:29,090 INFO L474 AbstractCegarLoop]: Abstraction has 905 states and 1172 transitions. [2024-09-25 10:25:29,091 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 120 states have (on average 1.6) internal successors, (192), 119 states have internal predecessors, (192), 65 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2024-09-25 10:25:29,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1172 transitions. [2024-09-25 10:25:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-09-25 10:25:29,094 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:29,094 INFO L216 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:29,112 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:29,295 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-09-25 10:25:29,295 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:29,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:29,296 INFO L85 PathProgramCache]: Analyzing trace with hash 151586886, now seen corresponding path program 28 times [2024-09-25 10:25:29,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:29,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596755674] [2024-09-25 10:25:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:29,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-25 10:25:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-25 10:25:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2024-09-25 10:25:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2024-09-25 10:25:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2024-09-25 10:25:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2024-09-25 10:25:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2024-09-25 10:25:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2024-09-25 10:25:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2024-09-25 10:25:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2024-09-25 10:25:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 695 proven. 362 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-25 10:25:31,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:31,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596755674] [2024-09-25 10:25:31,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596755674] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:31,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836443629] [2024-09-25 10:25:31,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:25:31,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:31,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:31,532 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:31,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-25 10:25:31,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:25:31,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:31,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-09-25 10:25:31,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 44 proven. 1013 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-25 10:25:33,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 44 proven. 1013 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-25 10:25:36,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836443629] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:36,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:36,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 126 [2024-09-25 10:25:36,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378427213] [2024-09-25 10:25:36,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:36,826 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2024-09-25 10:25:36,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:36,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2024-09-25 10:25:36,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2195, Invalid=13555, Unknown=0, NotChecked=0, Total=15750 [2024-09-25 10:25:36,829 INFO L87 Difference]: Start difference. First operand 905 states and 1172 transitions. Second operand has 126 states, 125 states have (on average 1.6) internal successors, (200), 124 states have internal predecessors, (200), 68 states have call successors, (70), 3 states have call predecessors, (70), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2024-09-25 10:25:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:46,291 INFO L93 Difference]: Finished difference Result 1062 states and 1343 transitions. [2024-09-25 10:25:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-09-25 10:25:46,292 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.6) internal successors, (200), 124 states have internal predecessors, (200), 68 states have call successors, (70), 3 states have call predecessors, (70), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) Word has length 190 [2024-09-25 10:25:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:46,297 INFO L225 Difference]: With dead ends: 1062 [2024-09-25 10:25:46,297 INFO L226 Difference]: Without dead ends: 927 [2024-09-25 10:25:46,299 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8138 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=4755, Invalid=26045, Unknown=0, NotChecked=0, Total=30800 [2024-09-25 10:25:46,300 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 33 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 6096 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 6379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 6096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:46,300 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1649 Invalid, 6379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 6096 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-25 10:25:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2024-09-25 10:25:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 923. [2024-09-25 10:25:46,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 636 states have (on average 1.0393081761006289) internal successors, (661), 649 states have internal predecessors, (661), 267 states have call successors, (267), 20 states have call predecessors, (267), 19 states have return successors, (266), 253 states have call predecessors, (266), 266 states have call successors, (266) [2024-09-25 10:25:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1194 transitions. [2024-09-25 10:25:46,573 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1194 transitions. Word has length 190 [2024-09-25 10:25:46,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:46,573 INFO L474 AbstractCegarLoop]: Abstraction has 923 states and 1194 transitions. [2024-09-25 10:25:46,573 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.6) internal successors, (200), 124 states have internal predecessors, (200), 68 states have call successors, (70), 3 states have call predecessors, (70), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2024-09-25 10:25:46,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:46,574 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1194 transitions. [2024-09-25 10:25:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-09-25 10:25:46,577 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:46,577 INFO L216 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:46,595 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-25 10:25:46,778 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:46,778 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:46,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:46,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2012303896, now seen corresponding path program 29 times [2024-09-25 10:25:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:46,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757892053] [2024-09-25 10:25:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:46,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:25:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:25:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:25:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:25:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:25:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:25:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:25:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:25:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:25:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:25:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:25:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:25:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:25:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-25 10:25:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-25 10:25:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2024-09-25 10:25:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2024-09-25 10:25:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2024-09-25 10:25:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2024-09-25 10:25:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2024-09-25 10:25:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2024-09-25 10:25:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2024-09-25 10:25:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2024-09-25 10:25:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 761 proven. 390 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-09-25 10:25:49,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:49,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757892053] [2024-09-25 10:25:49,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757892053] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:49,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468885493] [2024-09-25 10:25:49,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:25:49,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:49,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:49,201 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:49,202 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-25 10:25:49,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-25 10:25:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:49,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-09-25 10:25:49,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 46 proven. 1105 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-09-25 10:25:50,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 46 proven. 1105 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-09-25 10:25:54,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468885493] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:54,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:54,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 131 [2024-09-25 10:25:54,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429681640] [2024-09-25 10:25:54,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:54,997 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-09-25 10:25:54,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:54,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-09-25 10:25:54,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2373, Invalid=14657, Unknown=0, NotChecked=0, Total=17030 [2024-09-25 10:25:55,000 INFO L87 Difference]: Start difference. First operand 923 states and 1194 transitions. Second operand has 131 states, 130 states have (on average 1.6) internal successors, (208), 129 states have internal predecessors, (208), 71 states have call successors, (73), 3 states have call predecessors, (73), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2024-09-25 10:26:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:05,333 INFO L93 Difference]: Finished difference Result 1083 states and 1367 transitions. [2024-09-25 10:26:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-09-25 10:26:05,334 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 1.6) internal successors, (208), 129 states have internal predecessors, (208), 71 states have call successors, (73), 3 states have call predecessors, (73), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) Word has length 198 [2024-09-25 10:26:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:05,338 INFO L225 Difference]: With dead ends: 1083 [2024-09-25 10:26:05,338 INFO L226 Difference]: Without dead ends: 941 [2024-09-25 10:26:05,339 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 366 SyntacticMatches, 3 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8919 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=5151, Invalid=28155, Unknown=0, NotChecked=0, Total=33306 [2024-09-25 10:26:05,340 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 6396 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 6704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 6396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:05,340 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1674 Invalid, 6704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 6396 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-09-25 10:26:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2024-09-25 10:26:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 938. [2024-09-25 10:26:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 647 states have (on average 1.0401854714064915) internal successors, (673), 660 states have internal predecessors, (673), 270 states have call successors, (270), 21 states have call predecessors, (270), 20 states have return successors, (269), 256 states have call predecessors, (269), 269 states have call successors, (269) [2024-09-25 10:26:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1212 transitions. [2024-09-25 10:26:05,623 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1212 transitions. Word has length 198 [2024-09-25 10:26:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:05,624 INFO L474 AbstractCegarLoop]: Abstraction has 938 states and 1212 transitions. [2024-09-25 10:26:05,624 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 1.6) internal successors, (208), 129 states have internal predecessors, (208), 71 states have call successors, (73), 3 states have call predecessors, (73), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2024-09-25 10:26:05,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:05,625 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1212 transitions. [2024-09-25 10:26:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-09-25 10:26:05,628 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:05,628 INFO L216 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:05,643 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-25 10:26:05,832 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-25 10:26:05,832 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:05,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:05,833 INFO L85 PathProgramCache]: Analyzing trace with hash -277829626, now seen corresponding path program 30 times [2024-09-25 10:26:05,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:05,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370881268] [2024-09-25 10:26:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:05,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:26:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:26:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:26:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:26:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:26:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:26:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:26:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:26:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-25 10:26:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-25 10:26:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-25 10:26:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:26:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-25 10:26:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-25 10:26:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-09-25 10:26:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-25 10:26:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2024-09-25 10:26:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2024-09-25 10:26:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2024-09-25 10:26:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-09-25 10:26:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2024-09-25 10:26:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2024-09-25 10:26:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2024-09-25 10:26:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2024-09-25 10:26:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 830 proven. 419 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-09-25 10:26:08,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:08,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370881268] [2024-09-25 10:26:08,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370881268] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:08,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176866911] [2024-09-25 10:26:08,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:26:08,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:08,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:08,434 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:08,435 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-25 10:26:08,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2024-09-25 10:26:08,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:08,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-25 10:26:08,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 48 proven. 1201 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-09-25 10:26:11,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 48 proven. 1201 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-09-25 10:26:16,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176866911] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:16,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:16,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 161 [2024-09-25 10:26:16,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357107689] [2024-09-25 10:26:16,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:16,440 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2024-09-25 10:26:16,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2024-09-25 10:26:16,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2911, Invalid=22849, Unknown=0, NotChecked=0, Total=25760 [2024-09-25 10:26:16,444 INFO L87 Difference]: Start difference. First operand 938 states and 1212 transitions. Second operand has 161 states, 160 states have (on average 1.50625) internal successors, (241), 159 states have internal predecessors, (241), 74 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2024-09-25 10:26:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:26,964 INFO L93 Difference]: Finished difference Result 1019 states and 1277 transitions. [2024-09-25 10:26:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-09-25 10:26:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 160 states have (on average 1.50625) internal successors, (241), 159 states have internal predecessors, (241), 74 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Word has length 206 [2024-09-25 10:26:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:26,970 INFO L225 Difference]: With dead ends: 1019 [2024-09-25 10:26:26,970 INFO L226 Difference]: Without dead ends: 866 [2024-09-25 10:26:26,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 356 SyntacticMatches, 3 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14020 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=5952, Invalid=48570, Unknown=0, NotChecked=0, Total=54522 [2024-09-25 10:26:26,974 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 3929 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 4258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 3929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:26,975 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1401 Invalid, 4258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 3929 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-25 10:26:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2024-09-25 10:26:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2024-09-25 10:26:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 599 states have (on average 1.0417362270450752) internal successors, (624), 611 states have internal predecessors, (624), 246 states have call successors, (246), 21 states have call predecessors, (246), 20 states have return successors, (245), 233 states have call predecessors, (245), 245 states have call successors, (245) [2024-09-25 10:26:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1115 transitions. [2024-09-25 10:26:27,308 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1115 transitions. Word has length 206 [2024-09-25 10:26:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:27,308 INFO L474 AbstractCegarLoop]: Abstraction has 866 states and 1115 transitions. [2024-09-25 10:26:27,309 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 160 states have (on average 1.50625) internal successors, (241), 159 states have internal predecessors, (241), 74 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2024-09-25 10:26:27,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1115 transitions. [2024-09-25 10:26:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2024-09-25 10:26:27,311 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:27,311 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:27,323 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-25 10:26:27,511 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-25 10:26:27,512 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:27,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1387820504, now seen corresponding path program 31 times [2024-09-25 10:26:27,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:27,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476911064] [2024-09-25 10:26:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:27,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:26:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:26:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:26:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:26:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:26:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:26:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:26:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-25 10:26:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-25 10:26:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-25 10:26:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-25 10:26:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2024-09-25 10:26:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-25 10:26:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-09-25 10:26:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-09-25 10:26:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-09-25 10:26:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2024-09-25 10:26:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2024-09-25 10:26:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2024-09-25 10:26:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2024-09-25 10:26:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2024-09-25 10:26:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2024-09-25 10:26:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2024-09-25 10:26:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2024-09-25 10:26:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2024-09-25 10:26:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 902 proven. 449 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-09-25 10:26:30,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:30,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476911064] [2024-09-25 10:26:30,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476911064] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:30,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269471406] [2024-09-25 10:26:30,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:26:30,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:30,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:30,296 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:30,296 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-25 10:26:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-25 10:26:30,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 50 proven. 1301 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-09-25 10:26:32,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 50 proven. 1301 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-09-25 10:26:36,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269471406] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:36,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:36,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 141 [2024-09-25 10:26:36,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454146875] [2024-09-25 10:26:36,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:36,944 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-09-25 10:26:36,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:36,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-09-25 10:26:36,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2750, Invalid=16990, Unknown=0, NotChecked=0, Total=19740 [2024-09-25 10:26:36,948 INFO L87 Difference]: Start difference. First operand 866 states and 1115 transitions. Second operand has 141 states, 140 states have (on average 1.6) internal successors, (224), 139 states have internal predecessors, (224), 77 states have call successors, (79), 3 states have call predecessors, (79), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76)