./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested3-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/nested3-1.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 ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 14:27:00,403 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 14:27:00,449 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 14:27:00,452 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 14:27:00,452 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 14:27:00,476 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 14:27:00,476 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 14:27:00,477 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 14:27:00,477 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 14:27:00,480 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 14:27:00,480 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 14:27:00,480 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 14:27:00,481 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 14:27:00,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 14:27:00,481 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 14:27:00,481 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 14:27:00,481 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 14:27:00,482 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 14:27:00,482 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 14:27:00,482 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 14:27:00,483 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 14:27:00,484 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 14:27:00,484 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 14:27:00,484 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 14:27:00,485 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 14:27:00,485 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 14:27:00,485 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 14:27:00,485 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 14:27:00,486 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 14:27:00,486 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 14:27:00,486 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 14:27:00,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 14:27:00,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:27:00,487 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 14:27:00,487 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 14:27:00,488 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 14:27:00,488 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 14:27:00,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 14:27:00,488 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 14:27:00,488 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 14:27:00,489 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 14:27:00,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 14:27:00,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 14:27:00,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 14:27:00,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 14:27:00,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 14:27:00,709 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 14:27:00,709 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 14:27:00,710 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2024-10-15 14:27:01,938 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 14:27:02,081 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 14:27:02,082 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2024-10-15 14:27:02,092 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c05d71007/bc3bad2c89c74514b7fe1e6f59640bbb/FLAG32cd21dd7 [2024-10-15 14:27:02,106 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c05d71007/bc3bad2c89c74514b7fe1e6f59640bbb [2024-10-15 14:27:02,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 14:27:02,109 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 14:27:02,110 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 14:27:02,110 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 14:27:02,115 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 14:27:02,115 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,116 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4648e154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02, skipping insertion in model container [2024-10-15 14:27:02,116 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,132 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 14:27:02,294 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2024-10-15 14:27:02,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:27:02,315 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 14:27:02,322 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2024-10-15 14:27:02,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:27:02,338 INFO L204 MainTranslator]: Completed translation [2024-10-15 14:27:02,340 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02 WrapperNode [2024-10-15 14:27:02,340 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 14:27:02,341 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 14:27:02,341 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 14:27:02,341 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 14:27:02,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,351 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,356 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 14:27:02,356 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 14:27:02,356 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 14:27:02,356 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 14:27:02,357 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 14:27:02,363 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,368 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,383 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]. [2024-10-15 14:27:02,383 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,383 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,385 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,387 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,388 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,390 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 14:27:02,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 14:27:02,392 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 14:27:02,392 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 14:27:02,393 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (1/1) ... [2024-10-15 14:27:02,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:27:02,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:27:02,417 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) [2024-10-15 14:27:02,419 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 [2024-10-15 14:27:02,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 14:27:02,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 14:27:02,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 14:27:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 14:27:02,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 14:27:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 14:27:02,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 14:27:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 14:27:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 14:27:02,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 14:27:02,501 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 14:27:02,503 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 14:27:02,604 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-15 14:27:02,604 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 14:27:02,623 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 14:27:02,623 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-15 14:27:02,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:27:02 BoogieIcfgContainer [2024-10-15 14:27:02,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 14:27:02,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 14:27:02,627 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 14:27:02,629 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 14:27:02,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:27:02" (1/3) ... [2024-10-15 14:27:02,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f7494fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:27:02, skipping insertion in model container [2024-10-15 14:27:02,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:27:02" (2/3) ... [2024-10-15 14:27:02,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f7494fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:27:02, skipping insertion in model container [2024-10-15 14:27:02,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:27:02" (3/3) ... [2024-10-15 14:27:02,631 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2024-10-15 14:27:02,642 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 14:27:02,642 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 14:27:02,681 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 14:27:02,685 INFO L333 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;@44090f7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 14:27:02,686 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 14:27:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-15 14:27:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-15 14:27:02,694 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:27:02,695 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:27:02,695 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:27:02,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:02,703 INFO L85 PathProgramCache]: Analyzing trace with hash -91449342, now seen corresponding path program 1 times [2024-10-15 14:27:02,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:27:02,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247024348] [2024-10-15 14:27:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:27:02,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:27:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:02,912 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:27:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:27:02,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:27:02,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247024348] [2024-10-15 14:27:02,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247024348] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:27:02,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:27:02,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-15 14:27:02,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143047707] [2024-10-15 14:27:02,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:27:02,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-15 14:27:02,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:27:02,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-15 14:27:02,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 14:27:02,949 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:27:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:27:02,978 INFO L93 Difference]: Finished difference Result 48 states and 77 transitions. [2024-10-15 14:27:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-15 14:27:02,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-10-15 14:27:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:27:02,984 INFO L225 Difference]: With dead ends: 48 [2024-10-15 14:27:02,985 INFO L226 Difference]: Without dead ends: 26 [2024-10-15 14:27:02,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 14:27:02,989 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:27:02,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:27:03,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-15 14:27:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2024-10-15 14:27:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:27:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-15 14:27:03,025 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2024-10-15 14:27:03,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:27:03,026 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-15 14:27:03,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:27:03,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:03,026 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-15 14:27:03,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-15 14:27:03,027 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:27:03,027 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:27:03,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 14:27:03,027 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:27:03,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1474394065, now seen corresponding path program 1 times [2024-10-15 14:27:03,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:27:03,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746664293] [2024-10-15 14:27:03,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:27:03,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:27:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:03,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:27:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:27:03,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:27:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746664293] [2024-10-15 14:27:03,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746664293] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:27:03,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:27:03,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-15 14:27:03,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763047722] [2024-10-15 14:27:03,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:27:03,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-15 14:27:03,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:27:03,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-15 14:27:03,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 14:27:03,145 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:27:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:27:03,167 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2024-10-15 14:27:03,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-15 14:27:03,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-10-15 14:27:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:27:03,168 INFO L225 Difference]: With dead ends: 38 [2024-10-15 14:27:03,168 INFO L226 Difference]: Without dead ends: 24 [2024-10-15 14:27:03,169 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 14:27:03,170 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:27:03,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:27:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-15 14:27:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2024-10-15 14:27:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:27:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-10-15 14:27:03,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2024-10-15 14:27:03,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:27:03,177 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-10-15 14:27:03,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:27:03,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-10-15 14:27:03,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-15 14:27:03,178 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:27:03,178 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:27:03,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-15 14:27:03,179 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:27:03,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:03,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1513968721, now seen corresponding path program 1 times [2024-10-15 14:27:03,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:27:03,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490894822] [2024-10-15 14:27:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:27:03,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:27:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:03,242 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:27:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:27:03,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:27:03,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490894822] [2024-10-15 14:27:03,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490894822] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:27:03,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:27:03,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-15 14:27:03,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126868639] [2024-10-15 14:27:03,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:27:03,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-15 14:27:03,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:27:03,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-15 14:27:03,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 14:27:03,250 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:27:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:27:03,259 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2024-10-15 14:27:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-15 14:27:03,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-10-15 14:27:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:27:03,260 INFO L225 Difference]: With dead ends: 37 [2024-10-15 14:27:03,260 INFO L226 Difference]: Without dead ends: 22 [2024-10-15 14:27:03,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 14:27:03,262 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:27:03,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:27:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-15 14:27:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-15 14:27:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:27:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-10-15 14:27:03,266 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2024-10-15 14:27:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:27:03,266 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-10-15 14:27:03,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:27:03,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:03,267 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-10-15 14:27:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-15 14:27:03,268 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:27:03,268 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:27:03,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-15 14:27:03,268 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:27:03,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash 337912467, now seen corresponding path program 1 times [2024-10-15 14:27:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:27:03,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910978337] [2024-10-15 14:27:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:27:03,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:27:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:03,364 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:27:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:27:03,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:27:03,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910978337] [2024-10-15 14:27:03,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910978337] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:27:03,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758949974] [2024-10-15 14:27:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:27:03,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:27:03,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:27:03,374 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) [2024-10-15 14:27:03,375 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 14:27:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:03,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-15 14:27:03,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:27:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:27:03,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:27:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:27:03,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758949974] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:27:03,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:27:03,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2024-10-15 14:27:03,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54412877] [2024-10-15 14:27:03,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:27:03,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 14:27:03,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:27:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 14:27:03,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:27:03,529 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:27:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:27:03,631 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2024-10-15 14:27:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 14:27:03,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-15 14:27:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:27:03,633 INFO L225 Difference]: With dead ends: 61 [2024-10-15 14:27:03,633 INFO L226 Difference]: Without dead ends: 45 [2024-10-15 14:27:03,634 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-15 14:27:03,636 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:27:03,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 176 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:27:03,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-15 14:27:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2024-10-15 14:27:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-15 14:27:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-10-15 14:27:03,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 13 [2024-10-15 14:27:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:27:03,645 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-10-15 14:27:03,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:27:03,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:03,646 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-10-15 14:27:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-15 14:27:03,646 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:27:03,647 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:27:03,659 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 14:27:03,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:27:03,848 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:27:03,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash -304397137, now seen corresponding path program 2 times [2024-10-15 14:27:03,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:27:03,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535788365] [2024-10-15 14:27:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:27:03,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:27:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:03,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:27:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:27:03,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:27:03,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535788365] [2024-10-15 14:27:03,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535788365] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:27:03,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993621100] [2024-10-15 14:27:03,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:27:03,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:27:03,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:27:03,940 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) [2024-10-15 14:27:03,941 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 14:27:03,976 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:27:03,977 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:27:03,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-15 14:27:03,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:27:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:27:03,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:27:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:27:04,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993621100] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:27:04,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:27:04,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-15 14:27:04,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468741070] [2024-10-15 14:27:04,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:27:04,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-15 14:27:04,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:27:04,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-15 14:27:04,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-10-15 14:27:04,081 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:27:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:27:04,216 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2024-10-15 14:27:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:27:04,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-10-15 14:27:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:27:04,219 INFO L225 Difference]: With dead ends: 55 [2024-10-15 14:27:04,220 INFO L226 Difference]: Without dead ends: 31 [2024-10-15 14:27:04,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2024-10-15 14:27:04,221 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:27:04,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:27:04,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-15 14:27:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-10-15 14:27:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:27:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-10-15 14:27:04,227 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 16 [2024-10-15 14:27:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:27:04,228 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-10-15 14:27:04,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:27:04,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-10-15 14:27:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-15 14:27:04,230 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:27:04,230 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:27:04,242 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-15 14:27:04,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:27:04,433 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:27:04,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:04,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2050377169, now seen corresponding path program 3 times [2024-10-15 14:27:04,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:27:04,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630691126] [2024-10-15 14:27:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:27:04,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:27:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:04,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:27:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:27:04,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:27:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630691126] [2024-10-15 14:27:04,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630691126] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:27:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864414001] [2024-10-15 14:27:04,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:27:04,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:27:04,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:27:04,627 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) [2024-10-15 14:27:04,627 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 14:27:04,691 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-15 14:27:04,691 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:27:04,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-15 14:27:04,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:27:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-15 14:27:04,872 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:27:04,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864414001] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:27:04,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:27:04,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2024-10-15 14:27:04,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453679651] [2024-10-15 14:27:04,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:27:04,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-15 14:27:04,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:27:04,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-15 14:27:04,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-10-15 14:27:04,874 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:27:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:27:04,956 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2024-10-15 14:27:04,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:27:04,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-10-15 14:27:04,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:27:04,958 INFO L225 Difference]: With dead ends: 38 [2024-10-15 14:27:04,958 INFO L226 Difference]: Without dead ends: 36 [2024-10-15 14:27:04,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-15 14:27:04,959 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:27:04,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:27:04,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-15 14:27:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-10-15 14:27:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:27:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-10-15 14:27:04,971 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2024-10-15 14:27:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:27:04,972 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-10-15 14:27:04,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:27:04,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-10-15 14:27:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-15 14:27:04,973 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:27:04,973 INFO L215 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:27:04,985 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 14:27:05,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-15 14:27:05,174 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:27:05,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:05,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1587762515, now seen corresponding path program 1 times [2024-10-15 14:27:05,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:27:05,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628889692] [2024-10-15 14:27:05,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:27:05,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:27:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:05,327 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:27:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:05,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-15 14:27:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:27:05,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:27:05,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628889692] [2024-10-15 14:27:05,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628889692] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:27:05,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744223365] [2024-10-15 14:27:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:27:05,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:27:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:27:05,338 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) [2024-10-15 14:27:05,339 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 14:27:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:05,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-15 14:27:05,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:27:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:27:05,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:27:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:27:05,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744223365] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:27:05,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:27:05,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2024-10-15 14:27:05,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089352460] [2024-10-15 14:27:05,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:27:05,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:27:05,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:27:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:27:05,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:27:05,564 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-15 14:27:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:27:06,294 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2024-10-15 14:27:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-10-15 14:27:06,295 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-10-15 14:27:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:27:06,296 INFO L225 Difference]: With dead ends: 110 [2024-10-15 14:27:06,296 INFO L226 Difference]: Without dead ends: 81 [2024-10-15 14:27:06,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2024-10-15 14:27:06,298 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:27:06,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 269 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:27:06,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-15 14:27:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-10-15 14:27:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 70 states have internal predecessors, (76), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-15 14:27:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2024-10-15 14:27:06,313 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 29 [2024-10-15 14:27:06,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:27:06,314 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2024-10-15 14:27:06,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-15 14:27:06,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2024-10-15 14:27:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-10-15 14:27:06,316 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:27:06,316 INFO L215 NwaCegarLoop]: trace histogram [44, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:27:06,328 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 14:27:06,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:27:06,517 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:27:06,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1307739729, now seen corresponding path program 2 times [2024-10-15 14:27:06,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:27:06,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008968854] [2024-10-15 14:27:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:27:06,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:27:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:06,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:27:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:06,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-15 14:27:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:06,813 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-15 14:27:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:06,815 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-10-15 14:27:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:06,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-15 14:27:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-10-15 14:27:06,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:27:06,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008968854] [2024-10-15 14:27:06,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008968854] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:27:06,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566880792] [2024-10-15 14:27:06,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:27:06,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:27:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:27:06,822 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) [2024-10-15 14:27:06,823 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 14:27:06,878 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:27:06,878 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:27:06,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-15 14:27:06,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:27:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 8 proven. 931 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-10-15 14:27:07,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:27:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 43 proven. 896 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-10-15 14:27:07,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566880792] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:27:07,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:27:07,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2024-10-15 14:27:07,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635634527] [2024-10-15 14:27:07,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:27:07,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-15 14:27:07,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:27:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-15 14:27:07,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:27:07,485 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-15 14:27:10,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:27:10,813 INFO L93 Difference]: Finished difference Result 256 states and 302 transitions. [2024-10-15 14:27:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2024-10-15 14:27:10,813 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 87 [2024-10-15 14:27:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:27:10,815 INFO L225 Difference]: With dead ends: 256 [2024-10-15 14:27:10,815 INFO L226 Difference]: Without dead ends: 181 [2024-10-15 14:27:10,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8825 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3165, Invalid=21327, Unknown=0, NotChecked=0, Total=24492 [2024-10-15 14:27:10,822 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 97 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:27:10,822 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 537 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:27:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-10-15 14:27:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-10-15 14:27:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 164 states have internal predecessors, (176), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-15 14:27:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 202 transitions. [2024-10-15 14:27:10,849 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 202 transitions. Word has length 87 [2024-10-15 14:27:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:27:10,850 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 202 transitions. [2024-10-15 14:27:10,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-15 14:27:10,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 202 transitions. [2024-10-15 14:27:10,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-10-15 14:27:10,854 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:27:10,854 INFO L215 NwaCegarLoop]: trace histogram [120, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:27:10,868 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 14:27:11,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-15 14:27:11,055 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:27:11,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:11,055 INFO L85 PathProgramCache]: Analyzing trace with hash 709816549, now seen corresponding path program 3 times [2024-10-15 14:27:11,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:27:11,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142172036] [2024-10-15 14:27:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:27:11,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:27:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:11,553 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:27:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:11,556 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 14:27:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:11,558 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-15 14:27:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:11,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-15 14:27:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:11,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-10-15 14:27:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:11,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-10-15 14:27:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:11,564 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2024-10-15 14:27:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:11,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-10-15 14:27:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:11,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2024-10-15 14:27:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:11,570 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2024-10-15 14:27:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:11,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2024-10-15 14:27:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1551 proven. 78 refuted. 0 times theorem prover too weak. 7101 trivial. 0 not checked. [2024-10-15 14:27:11,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:27:11,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142172036] [2024-10-15 14:27:11,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142172036] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:27:11,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589516599] [2024-10-15 14:27:11,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:27:11,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:27:11,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:27:11,584 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) [2024-10-15 14:27:11,585 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 14:27:11,674 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-10-15 14:27:11,674 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:27:11,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-15 14:27:11,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:27:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1447 proven. 1548 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2024-10-15 14:27:11,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:27:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1569 proven. 78 refuted. 0 times theorem prover too weak. 7083 trivial. 0 not checked. [2024-10-15 14:27:11,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589516599] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:27:11,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:27:11,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-10-15 14:27:11,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879646313] [2024-10-15 14:27:11,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:27:11,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-15 14:27:11,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:27:11,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-15 14:27:11,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2024-10-15 14:27:11,983 INFO L87 Difference]: Start difference. First operand 181 states and 202 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 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) [2024-10-15 14:27:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:27:16,624 INFO L93 Difference]: Finished difference Result 496 states and 678 transitions. [2024-10-15 14:27:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-15 14:27:16,625 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 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 211 [2024-10-15 14:27:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:27:16,627 INFO L225 Difference]: With dead ends: 496 [2024-10-15 14:27:16,628 INFO L226 Difference]: Without dead ends: 321 [2024-10-15 14:27:16,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=598, Invalid=1042, Unknown=0, NotChecked=0, Total=1640 [2024-10-15 14:27:16,631 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:27:16,632 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 306 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:27:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2024-10-15 14:27:16,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2024-10-15 14:27:16,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 303 states have (on average 1.0429042904290429) internal successors, (316), 304 states have internal predecessors, (316), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-15 14:27:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 342 transitions. [2024-10-15 14:27:16,670 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 342 transitions. Word has length 211 [2024-10-15 14:27:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:27:16,671 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 342 transitions. [2024-10-15 14:27:16,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 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) [2024-10-15 14:27:16,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:16,671 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 342 transitions. [2024-10-15 14:27:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2024-10-15 14:27:16,679 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:27:16,679 INFO L215 NwaCegarLoop]: trace histogram [260, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:27:16,692 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 14:27:16,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:27:16,880 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:27:16,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:27:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash -434978715, now seen corresponding path program 4 times [2024-10-15 14:27:16,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:27:16,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293486598] [2024-10-15 14:27:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:27:16,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:27:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:18,259 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:27:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:18,261 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-15 14:27:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:18,264 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-15 14:27:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:18,265 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-10-15 14:27:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:18,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-10-15 14:27:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:18,267 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2024-10-15 14:27:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:18,269 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2024-10-15 14:27:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:18,270 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2024-10-15 14:27:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:18,271 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2024-10-15 14:27:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:18,277 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2024-10-15 14:27:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:18,278 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2024-10-15 14:27:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:27:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 6591 proven. 351 refuted. 0 times theorem prover too weak. 29718 trivial. 0 not checked. [2024-10-15 14:27:18,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:27:18,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293486598] [2024-10-15 14:27:18,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293486598] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:27:18,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101965753] [2024-10-15 14:27:18,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:27:18,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:27:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:27:18,291 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) [2024-10-15 14:27:18,292 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 14:27:18,459 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:27:18,459 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:27:18,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-15 14:27:18,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:27:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 20 proven. 33181 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2024-10-15 14:27:19,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:27:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 196 proven. 33005 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2024-10-15 14:27:20,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101965753] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:27:20,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:27:20,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 73 [2024-10-15 14:27:20,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923134153] [2024-10-15 14:27:20,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:27:20,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-10-15 14:27:20,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:27:20,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-10-15 14:27:20,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=4559, Unknown=0, NotChecked=0, Total=5256 [2024-10-15 14:27:20,480 INFO L87 Difference]: Start difference. First operand 321 states and 342 transitions. Second operand has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-15 14:29:31,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:31,931 INFO L93 Difference]: Finished difference Result 1018 states and 1118 transitions. [2024-10-15 14:29:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 628 states. [2024-10-15 14:29:31,931 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 351 [2024-10-15 14:29:31,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:31,934 INFO L225 Difference]: With dead ends: 1018 [2024-10-15 14:29:31,934 INFO L226 Difference]: Without dead ends: 703 [2024-10-15 14:29:31,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1356 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 674 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196022 ImplicationChecksByTransitivity, 129.3s TimeCoverageRelationStatistics Valid=29805, Invalid=426495, Unknown=0, NotChecked=0, Total=456300 [2024-10-15 14:29:31,961 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 396 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 11787 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 11823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 11787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:31,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 870 Invalid, 11823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 11787 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-10-15 14:29:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2024-10-15 14:29:32,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2024-10-15 14:29:32,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 673 states have (on average 1.037147102526003) internal successors, (698), 674 states have internal predecessors, (698), 26 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-15 14:29:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 748 transitions. [2024-10-15 14:29:32,073 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 748 transitions. Word has length 351 [2024-10-15 14:29:32,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:32,073 INFO L471 AbstractCegarLoop]: Abstraction has 703 states and 748 transitions. [2024-10-15 14:29:32,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-15 14:29:32,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 748 transitions. [2024-10-15 14:29:32,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2024-10-15 14:29:32,083 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:32,084 INFO L215 NwaCegarLoop]: trace histogram [594, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:32,098 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 14:29:32,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:32,285 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:32,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:32,285 INFO L85 PathProgramCache]: Analyzing trace with hash 674821009, now seen corresponding path program 5 times [2024-10-15 14:29:32,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:32,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848421866] [2024-10-15 14:29:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:32,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,189 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-15 14:29:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-10-15 14:29:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-10-15 14:29:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-10-15 14:29:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2024-10-15 14:29:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2024-10-15 14:29:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2024-10-15 14:29:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2024-10-15 14:29:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2024-10-15 14:29:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2024-10-15 14:29:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 385 [2024-10-15 14:29:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,213 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2024-10-15 14:29:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 455 [2024-10-15 14:29:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2024-10-15 14:29:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,216 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 525 [2024-10-15 14:29:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2024-10-15 14:29:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,219 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 595 [2024-10-15 14:29:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 630 [2024-10-15 14:29:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 665 [2024-10-15 14:29:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 700 [2024-10-15 14:29:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 735 [2024-10-15 14:29:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,224 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 770 [2024-10-15 14:29:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 191103 backedges. 16530 proven. 378 refuted. 0 times theorem prover too weak. 174195 trivial. 0 not checked. [2024-10-15 14:29:35,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:35,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848421866] [2024-10-15 14:29:35,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848421866] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:35,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596876805] [2024-10-15 14:29:35,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:29:35,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:35,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:35,235 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) [2024-10-15 14:29:35,255 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 14:29:40,534 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-10-15 14:29:40,534 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:40,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-15 14:29:40,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 191103 backedges. 59224 proven. 378 refuted. 0 times theorem prover too weak. 131501 trivial. 0 not checked. [2024-10-15 14:29:40,615 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 191103 backedges. 59034 proven. 378 refuted. 0 times theorem prover too weak. 131691 trivial. 0 not checked. [2024-10-15 14:29:41,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596876805] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:41,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:41,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2024-10-15 14:29:41,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857897523] [2024-10-15 14:29:41,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:41,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-10-15 14:29:41,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:41,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-10-15 14:29:41,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=2467, Unknown=0, NotChecked=0, Total=3422 [2024-10-15 14:29:41,673 INFO L87 Difference]: Start difference. First operand 703 states and 748 transitions. Second operand has 59 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 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) [2024-10-15 14:29:47,580 WARN L286 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 114 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)