./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6977cec8a403ff3f16926270da45a38f7b1f51a39c72ba3797fb74b9637fd796 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:27:23,021 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:27:23,071 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:27:23,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:27:23,077 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:27:23,101 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:27:23,103 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:27:23,103 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:27:23,103 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:27:23,104 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:27:23,104 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:27:23,104 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:27:23,105 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:27:23,105 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:27:23,106 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:27:23,106 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:27:23,106 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:27:23,107 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:27:23,107 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:27:23,107 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:27:23,107 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:27:23,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:27:23,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:27:23,108 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:27:23,108 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:27:23,108 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:27:23,108 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:27:23,109 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:27:23,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:27:23,109 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:27:23,109 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:27:23,109 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:27:23,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:27:23,110 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:27:23,110 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:27:23,115 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:27:23,115 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:27:23,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:27:23,116 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:27:23,116 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:27:23,116 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:27:23,117 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:27:23,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6977cec8a403ff3f16926270da45a38f7b1f51a39c72ba3797fb74b9637fd796 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:27:23,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:27:23,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:27:23,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:27:23,381 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:27:23,381 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:27:23,382 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c [2024-09-15 19:27:24,603 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:27:24,763 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:27:24,763 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c [2024-09-15 19:27:24,772 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1ea7057e9/4d5d387e420c4c9c9a5779be5dd904b7/FLAG0bf3cea1d [2024-09-15 19:27:24,784 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1ea7057e9/4d5d387e420c4c9c9a5779be5dd904b7 [2024-09-15 19:27:24,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:27:24,788 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:27:24,790 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:27:24,791 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:27:24,795 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:27:24,795 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:27:24" (1/1) ... [2024-09-15 19:27:24,796 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf7c458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:24, skipping insertion in model container [2024-09-15 19:27:24,796 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:27:24" (1/1) ... [2024-09-15 19:27:24,813 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:27:24,935 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c[538,551] [2024-09-15 19:27:24,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:27:24,965 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:27:24,976 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c[538,551] [2024-09-15 19:27:24,993 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:27:25,008 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:27:25,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25 WrapperNode [2024-09-15 19:27:25,008 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:27:25,009 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:27:25,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:27:25,010 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:27:25,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (1/1) ... [2024-09-15 19:27:25,020 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (1/1) ... [2024-09-15 19:27:25,026 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:27:25,027 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:27:25,028 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:27:25,028 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:27:25,028 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:27:25,037 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (1/1) ... [2024-09-15 19:27:25,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (1/1) ... [2024-09-15 19:27:25,042 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (1/1) ... [2024-09-15 19:27:25,059 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]. [2024-09-15 19:27:25,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (1/1) ... [2024-09-15 19:27:25,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (1/1) ... [2024-09-15 19:27:25,065 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (1/1) ... [2024-09-15 19:27:25,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (1/1) ... [2024-09-15 19:27:25,073 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (1/1) ... [2024-09-15 19:27:25,074 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (1/1) ... [2024-09-15 19:27:25,075 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:27:25,077 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:27:25,077 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:27:25,077 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:27:25,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (1/1) ... [2024-09-15 19:27:25,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:27:25,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:25,111 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) [2024-09-15 19:27:25,114 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 [2024-09-15 19:27:25,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:27:25,154 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:27:25,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:27:25,155 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:27:25,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:27:25,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:27:25,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:27:25,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:27:25,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:27:25,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:27:25,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:27:25,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:27:25,213 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:27:25,216 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:27:25,401 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 19:27:25,403 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:27:25,426 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:27:25,427 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 19:27:25,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:27:25 BoogieIcfgContainer [2024-09-15 19:27:25,428 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:27:25,430 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:27:25,430 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:27:25,432 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:27:25,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:27:24" (1/3) ... [2024-09-15 19:27:25,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257c5ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:27:25, skipping insertion in model container [2024-09-15 19:27:25,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:25" (2/3) ... [2024-09-15 19:27:25,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257c5ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:27:25, skipping insertion in model container [2024-09-15 19:27:25,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:27:25" (3/3) ... [2024-09-15 19:27:25,436 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound20.c [2024-09-15 19:27:25,448 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:27:25,448 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:27:25,500 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:27:25,505 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;@1e26d6df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:27:25,505 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:27:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-15 19:27:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:27:25,515 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:25,515 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:25,516 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:25,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:25,522 INFO L85 PathProgramCache]: Analyzing trace with hash 367441184, now seen corresponding path program 1 times [2024-09-15 19:27:25,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:25,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493265498] [2024-09-15 19:27:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:25,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:25,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:25,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:25,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:25,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:27:25,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:25,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493265498] [2024-09-15 19:27:25,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493265498] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:27:25,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:27:25,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:27:25,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142475726] [2024-09-15 19:27:25,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:25,700 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:27:25,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:25,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:27:25,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:27:25,719 INFO L87 Difference]: Start difference. First operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:27:25,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:25,747 INFO L93 Difference]: Finished difference Result 66 states and 107 transitions. [2024-09-15 19:27:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:27:25,752 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-15 19:27:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:25,758 INFO L225 Difference]: With dead ends: 66 [2024-09-15 19:27:25,759 INFO L226 Difference]: Without dead ends: 32 [2024-09-15 19:27:25,762 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:27:25,766 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:25,767 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-15 19:27:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-15 19:27:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:27:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-09-15 19:27:25,801 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 27 [2024-09-15 19:27:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:25,801 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-09-15 19:27:25,801 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:27:25,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-09-15 19:27:25,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:27:25,804 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:25,804 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:25,804 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:27:25,805 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:25,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:25,805 INFO L85 PathProgramCache]: Analyzing trace with hash -781266146, now seen corresponding path program 1 times [2024-09-15 19:27:25,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:25,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181263204] [2024-09-15 19:27:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:25,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:25,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:25,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:25,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:25,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:27:25,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:25,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181263204] [2024-09-15 19:27:25,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181263204] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:27:25,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:27:25,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:27:25,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461187112] [2024-09-15 19:27:25,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:25,977 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:25,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:25,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:25,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:27:25,978 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-15 19:27:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:26,032 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-09-15 19:27:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:27:26,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-15 19:27:26,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:26,036 INFO L225 Difference]: With dead ends: 45 [2024-09-15 19:27:26,036 INFO L226 Difference]: Without dead ends: 43 [2024-09-15 19:27:26,036 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:27:26,037 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:26,037 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-15 19:27:26,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-15 19:27:26,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:27:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-15 19:27:26,045 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 27 [2024-09-15 19:27:26,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:26,046 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-15 19:27:26,046 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-15 19:27:26,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-15 19:27:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 19:27:26,047 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:26,047 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:26,047 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 19:27:26,048 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:26,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:26,049 INFO L85 PathProgramCache]: Analyzing trace with hash 992341126, now seen corresponding path program 1 times [2024-09-15 19:27:26,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:26,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582237401] [2024-09-15 19:27:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:26,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:26,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:26,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:26,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:26,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:26,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:27:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:27:26,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:26,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582237401] [2024-09-15 19:27:26,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582237401] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:27:26,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:27:26,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:27:26,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553747531] [2024-09-15 19:27:26,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:26,208 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:26,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:26,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:27:26,209 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:27:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:26,279 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-15 19:27:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:27:26,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-15 19:27:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:26,281 INFO L225 Difference]: With dead ends: 49 [2024-09-15 19:27:26,281 INFO L226 Difference]: Without dead ends: 47 [2024-09-15 19:27:26,281 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:27:26,282 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:26,282 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:27:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-15 19:27:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-09-15 19:27:26,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:27:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-15 19:27:26,292 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2024-09-15 19:27:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:26,292 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-15 19:27:26,292 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:27:26,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-15 19:27:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-15 19:27:26,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:26,295 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:26,295 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 19:27:26,295 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:26,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:26,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1500804130, now seen corresponding path program 1 times [2024-09-15 19:27:26,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:26,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671602992] [2024-09-15 19:27:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:26,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:26,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712796686] [2024-09-15 19:27:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:26,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:26,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:26,330 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) [2024-09-15 19:27:26,331 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:27:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:26,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:27:26,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 19:27:26,479 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:27:26,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:26,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671602992] [2024-09-15 19:27:26,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:27:26,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712796686] [2024-09-15 19:27:26,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712796686] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:27:26,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:27:26,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:27:26,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707126842] [2024-09-15 19:27:26,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:26,483 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:26,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:26,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:26,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:27:26,484 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-15 19:27:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:26,552 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-09-15 19:27:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:27:26,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-15 19:27:26,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:26,554 INFO L225 Difference]: With dead ends: 66 [2024-09-15 19:27:26,556 INFO L226 Difference]: Without dead ends: 53 [2024-09-15 19:27:26,557 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:27:26,557 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:26,558 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:27:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-15 19:27:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-15 19:27:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-15 19:27:26,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-15 19:27:26,574 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 37 [2024-09-15 19:27:26,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:26,574 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-15 19:27:26,574 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-15 19:27:26,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:26,575 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-15 19:27:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 19:27:26,575 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:26,576 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:26,590 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:27:26,780 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:26,781 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:26,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:26,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1357220557, now seen corresponding path program 1 times [2024-09-15 19:27:26,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:26,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098735071] [2024-09-15 19:27:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:26,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:26,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117588432] [2024-09-15 19:27:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:26,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:26,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:26,800 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) [2024-09-15 19:27:26,805 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:27:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:26,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-15 19:27:26,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 19:27:26,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 19:27:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:27,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098735071] [2024-09-15 19:27:27,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:27:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117588432] [2024-09-15 19:27:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117588432] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:27,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:27:27,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-15 19:27:27,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071928531] [2024-09-15 19:27:27,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:27,137 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 19:27:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 19:27:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-15 19:27:27,139 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-15 19:27:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:27,239 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2024-09-15 19:27:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:27:27,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 44 [2024-09-15 19:27:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:27,242 INFO L225 Difference]: With dead ends: 68 [2024-09-15 19:27:27,245 INFO L226 Difference]: Without dead ends: 66 [2024-09-15 19:27:27,245 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:27:27,246 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:27,246 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:27:27,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-15 19:27:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-09-15 19:27:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-15 19:27:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-09-15 19:27:27,256 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 44 [2024-09-15 19:27:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:27,256 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-09-15 19:27:27,256 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-15 19:27:27,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-09-15 19:27:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 19:27:27,258 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:27,258 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:27,270 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:27:27,462 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:27,463 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:27,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:27,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1728018148, now seen corresponding path program 1 times [2024-09-15 19:27:27,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:27,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862040203] [2024-09-15 19:27:27,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:27,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:27,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732131666] [2024-09-15 19:27:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:27,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:27,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:27,491 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) [2024-09-15 19:27:27,492 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:27:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:27,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 19:27:27,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-15 19:27:27,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-15 19:27:27,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:27,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862040203] [2024-09-15 19:27:27,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:27:27,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732131666] [2024-09-15 19:27:27,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732131666] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:27:27,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:27:27,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-15 19:27:27,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079148103] [2024-09-15 19:27:27,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:27,744 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:27,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:27,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:27:27,745 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-15 19:27:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:27,810 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2024-09-15 19:27:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:27:27,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2024-09-15 19:27:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:27,812 INFO L225 Difference]: With dead ends: 73 [2024-09-15 19:27:27,812 INFO L226 Difference]: Without dead ends: 71 [2024-09-15 19:27:27,812 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:27:27,813 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:27,813 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 125 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-15 19:27:27,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-09-15 19:27:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-15 19:27:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2024-09-15 19:27:27,833 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 54 [2024-09-15 19:27:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:27,833 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2024-09-15 19:27:27,833 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-15 19:27:27,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:27,834 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2024-09-15 19:27:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-15 19:27:27,837 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:27,837 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:27,850 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 19:27:28,037 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-15 19:27:28,038 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:28,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:28,039 INFO L85 PathProgramCache]: Analyzing trace with hash 515743006, now seen corresponding path program 1 times [2024-09-15 19:27:28,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:28,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257186420] [2024-09-15 19:27:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:28,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:28,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:28,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:28,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:28,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:28,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:27:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:28,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:27:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:28,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:27:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:28,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:27:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:28,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:27:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:28,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 19:27:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-15 19:27:28,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:28,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257186420] [2024-09-15 19:27:28,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257186420] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:27:28,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:27:28,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:27:28,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432674753] [2024-09-15 19:27:28,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:28,199 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:28,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:28,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:28,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:27:28,203 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-15 19:27:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:28,247 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2024-09-15 19:27:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:27:28,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2024-09-15 19:27:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:28,248 INFO L225 Difference]: With dead ends: 78 [2024-09-15 19:27:28,248 INFO L226 Difference]: Without dead ends: 66 [2024-09-15 19:27:28,249 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:27:28,249 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:28,249 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-15 19:27:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-15 19:27:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-15 19:27:28,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2024-09-15 19:27:28,265 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 60 [2024-09-15 19:27:28,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:28,266 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2024-09-15 19:27:28,266 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-15 19:27:28,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2024-09-15 19:27:28,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-15 19:27:28,267 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:28,268 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:28,268 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-15 19:27:28,268 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:28,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:28,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1452252536, now seen corresponding path program 1 times [2024-09-15 19:27:28,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:28,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029965080] [2024-09-15 19:27:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:28,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:28,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471404600] [2024-09-15 19:27:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:28,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:28,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:28,302 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) [2024-09-15 19:27:28,303 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:27:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:28,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-15 19:27:28,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-09-15 19:27:28,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-15 19:27:30,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:30,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029965080] [2024-09-15 19:27:30,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:27:30,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471404600] [2024-09-15 19:27:30,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471404600] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:30,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:27:30,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-09-15 19:27:30,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161058204] [2024-09-15 19:27:30,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:30,172 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 19:27:30,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:30,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 19:27:30,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-15 19:27:30,173 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-15 19:27:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:31,295 INFO L93 Difference]: Finished difference Result 153 states and 210 transitions. [2024-09-15 19:27:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 19:27:31,295 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 74 [2024-09-15 19:27:31,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:31,297 INFO L225 Difference]: With dead ends: 153 [2024-09-15 19:27:31,297 INFO L226 Difference]: Without dead ends: 130 [2024-09-15 19:27:31,298 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-09-15 19:27:31,298 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:31,299 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 256 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 19:27:31,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-15 19:27:31,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2024-09-15 19:27:31,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-15 19:27:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2024-09-15 19:27:31,323 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 74 [2024-09-15 19:27:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:31,323 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2024-09-15 19:27:31,323 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-15 19:27:31,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2024-09-15 19:27:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-15 19:27:31,325 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:31,325 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:31,338 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 19:27:31,525 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:31,525 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:31,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:31,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1571705391, now seen corresponding path program 1 times [2024-09-15 19:27:31,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:31,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701553993] [2024-09-15 19:27:31,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:31,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:31,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040290841] [2024-09-15 19:27:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:31,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:31,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:31,554 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) [2024-09-15 19:27:31,560 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:27:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:31,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-15 19:27:31,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-09-15 19:27:31,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-15 19:27:32,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:32,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701553993] [2024-09-15 19:27:32,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:27:32,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040290841] [2024-09-15 19:27:32,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040290841] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:32,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:27:32,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-15 19:27:32,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941931449] [2024-09-15 19:27:32,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:32,445 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 19:27:32,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:32,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 19:27:32,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-15 19:27:32,446 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-15 19:27:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:32,926 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2024-09-15 19:27:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 19:27:32,927 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 85 [2024-09-15 19:27:32,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:32,929 INFO L225 Difference]: With dead ends: 145 [2024-09-15 19:27:32,929 INFO L226 Difference]: Without dead ends: 111 [2024-09-15 19:27:32,930 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-15 19:27:32,930 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 25 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:32,931 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 414 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:27:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-15 19:27:32,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2024-09-15 19:27:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-15 19:27:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2024-09-15 19:27:32,971 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 85 [2024-09-15 19:27:32,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:32,971 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2024-09-15 19:27:32,971 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-15 19:27:32,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2024-09-15 19:27:32,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-15 19:27:32,973 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:32,973 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:32,991 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 19:27:33,177 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:33,178 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:33,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:33,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1973508941, now seen corresponding path program 2 times [2024-09-15 19:27:33,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:33,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332885071] [2024-09-15 19:27:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:33,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:27:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:27:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:27:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:27:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:27:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:27:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 19:27:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:27:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 19:27:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-15 19:27:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-15 19:27:33,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:33,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332885071] [2024-09-15 19:27:33,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332885071] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:27:33,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786472803] [2024-09-15 19:27:33,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:27:33,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:33,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:33,340 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) [2024-09-15 19:27:33,341 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:27:33,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:27:33,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:27:33,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:27:33,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-15 19:27:33,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-15 19:27:33,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786472803] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:33,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:27:33,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-15 19:27:33,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909608741] [2024-09-15 19:27:33,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:33,484 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:33,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:27:33,484 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-15 19:27:33,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:33,540 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2024-09-15 19:27:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 19:27:33,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 87 [2024-09-15 19:27:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:33,542 INFO L225 Difference]: With dead ends: 124 [2024-09-15 19:27:33,542 INFO L226 Difference]: Without dead ends: 102 [2024-09-15 19:27:33,542 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:27:33,542 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:33,543 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-15 19:27:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-09-15 19:27:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-15 19:27:33,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2024-09-15 19:27:33,567 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 87 [2024-09-15 19:27:33,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:33,567 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2024-09-15 19:27:33,567 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-15 19:27:33,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:33,568 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2024-09-15 19:27:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-15 19:27:33,569 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:33,569 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:33,586 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-15 19:27:33,770 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-15 19:27:33,771 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:33,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:33,771 INFO L85 PathProgramCache]: Analyzing trace with hash -637517709, now seen corresponding path program 1 times [2024-09-15 19:27:33,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:33,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40638552] [2024-09-15 19:27:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:33,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:33,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:27:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:34,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:27:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:34,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:27:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:34,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:27:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:34,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:27:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:34,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:27:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:34,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 19:27:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:34,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:27:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:34,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 19:27:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:34,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-15 19:27:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:34,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-15 19:27:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-15 19:27:34,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:34,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40638552] [2024-09-15 19:27:34,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40638552] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:27:34,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339607308] [2024-09-15 19:27:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:34,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:34,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:34,057 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) [2024-09-15 19:27:34,060 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 19:27:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:34,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-15 19:27:34,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-15 19:27:34,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-15 19:27:34,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339607308] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:34,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:27:34,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-09-15 19:27:34,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274587348] [2024-09-15 19:27:34,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:34,634 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 19:27:34,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 19:27:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-15 19:27:34,635 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-15 19:27:34,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:34,877 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2024-09-15 19:27:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:27:34,878 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 90 [2024-09-15 19:27:34,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:34,879 INFO L225 Difference]: With dead ends: 117 [2024-09-15 19:27:34,879 INFO L226 Difference]: Without dead ends: 100 [2024-09-15 19:27:34,881 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-09-15 19:27:34,882 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 27 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:34,883 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 384 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:27:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-15 19:27:34,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2024-09-15 19:27:34,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-15 19:27:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-09-15 19:27:34,906 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 90 [2024-09-15 19:27:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:34,906 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-09-15 19:27:34,907 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-15 19:27:34,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-09-15 19:27:34,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-15 19:27:34,908 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:34,908 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:34,923 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-15 19:27:35,112 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:35,113 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:35,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:35,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1204328542, now seen corresponding path program 1 times [2024-09-15 19:27:35,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:35,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397265783] [2024-09-15 19:27:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:35,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:27:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:27:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:27:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:27:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:27:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:27:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 19:27:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:27:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 19:27:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-15 19:27:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-15 19:27:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-15 19:27:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-15 19:27:35,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:35,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397265783] [2024-09-15 19:27:35,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397265783] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:27:35,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64180326] [2024-09-15 19:27:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:35,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:35,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:35,221 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) [2024-09-15 19:27:35,222 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 19:27:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:35,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-15 19:27:35,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-09-15 19:27:35,298 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:27:35,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64180326] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:27:35,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:27:35,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-15 19:27:35,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898747069] [2024-09-15 19:27:35,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:35,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:35,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:35,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:35,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:27:35,301 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-15 19:27:35,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:35,361 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2024-09-15 19:27:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:27:35,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 94 [2024-09-15 19:27:35,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:35,363 INFO L225 Difference]: With dead ends: 100 [2024-09-15 19:27:35,363 INFO L226 Difference]: Without dead ends: 88 [2024-09-15 19:27:35,364 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:27:35,364 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:35,364 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:35,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-15 19:27:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-15 19:27:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-15 19:27:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2024-09-15 19:27:35,386 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 94 [2024-09-15 19:27:35,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:35,386 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2024-09-15 19:27:35,387 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-15 19:27:35,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2024-09-15 19:27:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-15 19:27:35,388 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:35,388 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:35,401 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 19:27:35,588 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:35,589 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:35,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:35,589 INFO L85 PathProgramCache]: Analyzing trace with hash -588826413, now seen corresponding path program 3 times [2024-09-15 19:27:35,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:35,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966636837] [2024-09-15 19:27:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:35,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:35,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468492457] [2024-09-15 19:27:35,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:27:35,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:35,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:35,626 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) [2024-09-15 19:27:35,627 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 19:27:35,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 19:27:35,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:27:35,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-15 19:27:35,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 69 proven. 47 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2024-09-15 19:27:36,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:51,016 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:28:54,668 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-15 19:29:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 74 proven. 42 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2024-09-15 19:29:48,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:29:48,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966636837] [2024-09-15 19:29:48,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:29:48,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468492457] [2024-09-15 19:29:48,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468492457] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:29:48,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:29:48,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-09-15 19:29:48,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122120419] [2024-09-15 19:29:48,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:29:48,243 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 19:29:48,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:29:48,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 19:29:48,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-09-15 19:29:48,246 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 19 states have internal predecessors, (47), 11 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-15 19:29:57,497 WARN L293 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 112 DAG size of output: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-15 19:30:05,827 WARN L293 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 108 DAG size of output: 79 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-15 19:30:12,968 WARN L293 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 114 DAG size of output: 85 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-15 19:30:19,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:30:26,345 WARN L293 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 122 DAG size of output: 83 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-15 19:30:32,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:30:32,859 INFO L93 Difference]: Finished difference Result 181 states and 242 transitions. [2024-09-15 19:30:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 19:30:32,860 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 19 states have internal predecessors, (47), 11 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) Word has length 104 [2024-09-15 19:30:32,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:30:32,861 INFO L225 Difference]: With dead ends: 181 [2024-09-15 19:30:32,861 INFO L226 Difference]: Without dead ends: 159 [2024-09-15 19:30:32,862 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2024-09-15 19:30:32,862 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 47 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:30:32,862 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 324 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-09-15 19:30:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-15 19:30:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 140. [2024-09-15 19:30:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 87 states have internal predecessors, (95), 43 states have call successors, (43), 15 states have call predecessors, (43), 14 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2024-09-15 19:30:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 179 transitions. [2024-09-15 19:30:32,906 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 179 transitions. Word has length 104 [2024-09-15 19:30:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:30:32,906 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 179 transitions. [2024-09-15 19:30:32,907 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 19 states have internal predecessors, (47), 11 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-15 19:30:32,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 179 transitions. [2024-09-15 19:30:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-15 19:30:32,908 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:30:32,908 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:30:32,915 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 19:30:33,108 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-15 19:30:33,109 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:30:33,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:33,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1973122394, now seen corresponding path program 2 times [2024-09-15 19:30:33,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:30:33,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646650513] [2024-09-15 19:30:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:33,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:30:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:30:33,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618002742] [2024-09-15 19:30:33,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:30:33,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:33,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:30:33,139 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) [2024-09-15 19:30:33,143 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 19:30:33,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:30:33,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:30:33,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-15 19:30:33,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:30:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 124 proven. 22 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2024-09-15 19:30:33,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:30:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-15 19:30:33,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:30:33,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646650513] [2024-09-15 19:30:33,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:30:33,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618002742] [2024-09-15 19:30:33,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618002742] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:30:33,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:30:33,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-09-15 19:30:33,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728255715] [2024-09-15 19:30:33,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:30:33,509 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 19:30:33,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:30:33,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 19:30:33,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-09-15 19:30:33,510 INFO L87 Difference]: Start difference. First operand 140 states and 179 transitions. Second operand has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-15 19:30:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:30:34,119 INFO L93 Difference]: Finished difference Result 156 states and 193 transitions. [2024-09-15 19:30:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 19:30:34,120 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 115 [2024-09-15 19:30:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:30:34,121 INFO L225 Difference]: With dead ends: 156 [2024-09-15 19:30:34,121 INFO L226 Difference]: Without dead ends: 154 [2024-09-15 19:30:34,121 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-09-15 19:30:34,122 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:30:34,122 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 233 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:30:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-09-15 19:30:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2024-09-15 19:30:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 92 states have (on average 1.141304347826087) internal successors, (105), 98 states have internal predecessors, (105), 44 states have call successors, (44), 18 states have call predecessors, (44), 17 states have return successors, (42), 37 states have call predecessors, (42), 42 states have call successors, (42) [2024-09-15 19:30:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 191 transitions. [2024-09-15 19:30:34,174 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 191 transitions. Word has length 115 [2024-09-15 19:30:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:30:34,174 INFO L474 AbstractCegarLoop]: Abstraction has 154 states and 191 transitions. [2024-09-15 19:30:34,174 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-15 19:30:34,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 191 transitions. [2024-09-15 19:30:34,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-15 19:30:34,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:30:34,176 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:30:34,188 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-15 19:30:34,379 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-15 19:30:34,380 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:30:34,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1536141598, now seen corresponding path program 4 times [2024-09-15 19:30:34,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:30:34,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742179461] [2024-09-15 19:30:34,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:34,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:30:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:30:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:30:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:30:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:30:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:30:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:30:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:30:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:30:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:30:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:30:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 19:30:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:30:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 19:30:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-15 19:30:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-15 19:30:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-15 19:30:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-15 19:30:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-15 19:30:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-15 19:30:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-15 19:30:34,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:30:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742179461] [2024-09-15 19:30:34,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742179461] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:30:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059122670] [2024-09-15 19:30:34,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 19:30:34,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:34,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:30:34,622 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) [2024-09-15 19:30:34,623 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 19:30:34,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 19:30:34,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:30:34,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 19:30:34,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:30:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-15 19:30:34,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:30:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-15 19:30:34,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059122670] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:30:34,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:30:34,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-09-15 19:30:34,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495102524] [2024-09-15 19:30:34,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:30:34,881 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 19:30:34,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:30:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 19:30:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:30:34,882 INFO L87 Difference]: Start difference. First operand 154 states and 191 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-15 19:30:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:30:34,977 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2024-09-15 19:30:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:30:34,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 117 [2024-09-15 19:30:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:30:34,979 INFO L225 Difference]: With dead ends: 184 [2024-09-15 19:30:34,979 INFO L226 Difference]: Without dead ends: 144 [2024-09-15 19:30:34,979 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:30:34,980 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:30:34,980 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 188 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:30:34,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-15 19:30:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2024-09-15 19:30:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 90 states have internal predecessors, (94), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-15 19:30:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 170 transitions. [2024-09-15 19:30:35,021 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 170 transitions. Word has length 117 [2024-09-15 19:30:35,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:30:35,021 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 170 transitions. [2024-09-15 19:30:35,021 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-15 19:30:35,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 170 transitions. [2024-09-15 19:30:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-15 19:30:35,023 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:30:35,023 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:30:35,037 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-15 19:30:35,223 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-15 19:30:35,223 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:30:35,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 47128766, now seen corresponding path program 2 times [2024-09-15 19:30:35,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:30:35,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725250022] [2024-09-15 19:30:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:30:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:30:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:30:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:30:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:30:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:30:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:30:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:30:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:30:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:30:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:30:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 19:30:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:30:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 19:30:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-15 19:30:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-15 19:30:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-15 19:30:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-15 19:30:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-15 19:30:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-15 19:30:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-15 19:30:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-09-15 19:30:35,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:30:35,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725250022] [2024-09-15 19:30:35,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725250022] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:30:35,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351079433] [2024-09-15 19:30:35,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:30:35,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:35,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:30:35,554 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) [2024-09-15 19:30:35,555 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 19:30:35,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:30:35,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:30:35,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-15 19:30:35,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:30:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-15 19:30:36,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:30:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-15 19:30:36,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351079433] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:30:36,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:30:36,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 30 [2024-09-15 19:30:36,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029670114] [2024-09-15 19:30:36,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:30:36,906 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-15 19:30:36,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:30:36,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-15 19:30:36,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-09-15 19:30:36,907 INFO L87 Difference]: Start difference. First operand 142 states and 170 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-15 19:30:37,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:30:37,621 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2024-09-15 19:30:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 19:30:37,621 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) Word has length 120 [2024-09-15 19:30:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:30:37,624 INFO L225 Difference]: With dead ends: 158 [2024-09-15 19:30:37,624 INFO L226 Difference]: Without dead ends: 130 [2024-09-15 19:30:37,624 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 19:30:37,625 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 19 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 19:30:37,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 657 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 19:30:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-15 19:30:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2024-09-15 19:30:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 80 states have internal predecessors, (83), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-15 19:30:37,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2024-09-15 19:30:37,669 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 120 [2024-09-15 19:30:37,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:30:37,669 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2024-09-15 19:30:37,670 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-15 19:30:37,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:37,670 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2024-09-15 19:30:37,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-15 19:30:37,671 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:30:37,671 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:30:37,685 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-15 19:30:37,871 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-15 19:30:37,872 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:30:37,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:37,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1414642200, now seen corresponding path program 5 times [2024-09-15 19:30:37,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:30:37,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702723072] [2024-09-15 19:30:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:37,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:30:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:30:37,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824473784] [2024-09-15 19:30:37,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 19:30:37,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:37,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:30:37,922 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) [2024-09-15 19:30:37,923 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 19:30:38,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-15 19:30:38,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:30:38,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-15 19:30:38,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:30:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 82 proven. 101 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2024-09-15 19:30:38,708 INFO L327 TraceCheckSpWp]: Computing backward predicates...