./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.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 de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd3-ll.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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 18:32:13,277 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:32:13,330 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:32:13,333 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:32:13,334 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:32:13,355 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:32:13,355 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:32:13,356 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:32:13,356 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:32:13,356 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:32:13,357 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:32:13,357 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:32:13,357 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:32:13,358 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:32:13,358 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:32:13,358 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:32:13,359 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:32:13,359 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:32:13,359 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:32:13,359 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:32:13,360 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:32:13,360 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:32:13,360 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:32:13,361 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:32:13,361 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:32:13,361 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:32:13,361 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:32:13,362 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:32:13,362 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:32:13,362 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:32:13,362 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:32:13,363 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:32:13,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:32:13,363 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:32:13,363 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:32:13,364 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:32:13,364 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:32:13,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:32:13,364 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:32:13,365 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:32:13,365 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:32:13,365 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:32:13,365 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:32:13,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:32:13,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:32:13,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:32:13,566 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:32:13,567 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:32:13,568 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-09-17 18:32:15,040 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:32:15,196 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:32:15,197 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-09-17 18:32:15,202 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f5efc98db/279f237917d74504b9487fa0161b91ac/FLAGcc3c21375 [2024-09-17 18:32:15,213 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f5efc98db/279f237917d74504b9487fa0161b91ac [2024-09-17 18:32:15,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:32:15,216 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:32:15,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:32:15,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:32:15,221 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:32:15,222 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26964907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15, skipping insertion in model container [2024-09-17 18:32:15,223 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,238 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:32:15,374 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2024-09-17 18:32:15,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:32:15,413 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:32:15,434 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2024-09-17 18:32:15,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:32:15,472 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:32:15,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15 WrapperNode [2024-09-17 18:32:15,475 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:32:15,478 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:32:15,478 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:32:15,478 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:32:15,490 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,498 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,515 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:32:15,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:32:15,520 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:32:15,523 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:32:15,523 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:32:15,534 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,536 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,550 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-17 18:32:15,554 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,554 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,559 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,568 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,572 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:32:15,575 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:32:15,578 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:32:15,578 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:32:15,579 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (1/1) ... [2024-09-17 18:32:15,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:32:15,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:15,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-17 18:32:15,643 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-17 18:32:15,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:32:15,681 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-17 18:32:15,682 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-17 18:32:15,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:32:15,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:32:15,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:32:15,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:32:15,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:32:15,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:32:15,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:32:15,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:32:15,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:32:15,733 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:32:15,734 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:32:15,939 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-17 18:32:15,940 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:32:15,960 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:32:15,960 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-17 18:32:15,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:32:15 BoogieIcfgContainer [2024-09-17 18:32:15,961 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:32:15,962 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:32:15,962 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:32:15,965 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:32:15,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:32:15" (1/3) ... [2024-09-17 18:32:15,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21247572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:32:15, skipping insertion in model container [2024-09-17 18:32:15,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:15" (2/3) ... [2024-09-17 18:32:15,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21247572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:32:15, skipping insertion in model container [2024-09-17 18:32:15,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:32:15" (3/3) ... [2024-09-17 18:32:15,967 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2024-09-17 18:32:15,979 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:32:15,980 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:32:16,023 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:32:16,031 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4938bda5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:32:16,031 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:32:16,035 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:32:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-17 18:32:16,049 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:16,050 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:16,050 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:16,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:16,058 INFO L85 PathProgramCache]: Analyzing trace with hash 48210315, now seen corresponding path program 1 times [2024-09-17 18:32:16,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:16,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777155115] [2024-09-17 18:32:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:16,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:32:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:32:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:32:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:32:16,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:16,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777155115] [2024-09-17 18:32:16,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777155115] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:16,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:32:16,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 18:32:16,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677448242] [2024-09-17 18:32:16,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:16,273 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-17 18:32:16,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-17 18:32:16,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:32:16,298 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 18:32:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:16,319 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2024-09-17 18:32:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-17 18:32:16,321 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-17 18:32:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:16,326 INFO L225 Difference]: With dead ends: 64 [2024-09-17 18:32:16,326 INFO L226 Difference]: Without dead ends: 31 [2024-09-17 18:32:16,329 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:32:16,331 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:16,332 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:32:16,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-17 18:32:16,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-17 18:32:16,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:32:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2024-09-17 18:32:16,362 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 21 [2024-09-17 18:32:16,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:16,362 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2024-09-17 18:32:16,362 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 18:32:16,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2024-09-17 18:32:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-17 18:32:16,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:16,364 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:16,365 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:32:16,365 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:16,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:16,365 INFO L85 PathProgramCache]: Analyzing trace with hash -190498723, now seen corresponding path program 1 times [2024-09-17 18:32:16,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:16,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937503172] [2024-09-17 18:32:16,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:16,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:32:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:32:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:32:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:32:16,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:16,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937503172] [2024-09-17 18:32:16,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937503172] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:16,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:32:16,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-17 18:32:16,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770251008] [2024-09-17 18:32:16,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:16,522 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:32:16,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:32:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:32:16,523 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-17 18:32:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:16,590 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2024-09-17 18:32:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:32:16,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2024-09-17 18:32:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:16,592 INFO L225 Difference]: With dead ends: 50 [2024-09-17 18:32:16,592 INFO L226 Difference]: Without dead ends: 43 [2024-09-17 18:32:16,592 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:32:16,593 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:16,593 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 124 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:32:16,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-17 18:32:16,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-09-17 18:32:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:32:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-17 18:32:16,606 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2024-09-17 18:32:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:16,607 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-17 18:32:16,607 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-17 18:32:16,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-17 18:32:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-17 18:32:16,609 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:16,609 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:16,609 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 18:32:16,609 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:16,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash -832406041, now seen corresponding path program 1 times [2024-09-17 18:32:16,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:16,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211351430] [2024-09-17 18:32:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:16,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:16,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475667756] [2024-09-17 18:32:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:16,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:16,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:16,638 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:16,639 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 18:32:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:32:16,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:32:16,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:32:16,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:16,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211351430] [2024-09-17 18:32:16,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:16,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475667756] [2024-09-17 18:32:16,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475667756] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:16,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:32:16,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:32:16,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182903837] [2024-09-17 18:32:16,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:16,761 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:32:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:32:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:32:16,762 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-17 18:32:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:16,799 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2024-09-17 18:32:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:32:16,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-17 18:32:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:16,800 INFO L225 Difference]: With dead ends: 49 [2024-09-17 18:32:16,800 INFO L226 Difference]: Without dead ends: 47 [2024-09-17 18:32:16,801 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:32:16,801 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:16,802 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:32:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-17 18:32:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-17 18:32:16,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:32:16,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-09-17 18:32:16,811 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 25 [2024-09-17 18:32:16,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:16,811 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-09-17 18:32:16,811 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-17 18:32:16,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:16,812 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-09-17 18:32:16,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-17 18:32:16,812 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:16,813 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:16,827 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 18:32:17,017 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:17,018 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:17,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:17,019 INFO L85 PathProgramCache]: Analyzing trace with hash -143490539, now seen corresponding path program 1 times [2024-09-17 18:32:17,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:17,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353222981] [2024-09-17 18:32:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:17,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:17,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:32:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:17,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:32:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:17,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:32:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:32:17,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:17,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353222981] [2024-09-17 18:32:17,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353222981] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:17,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060779127] [2024-09-17 18:32:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:17,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:17,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:17,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:17,196 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 18:32:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:17,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:32:17,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:32:17,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:32:17,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060779127] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:17,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:32:17,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-17 18:32:17,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596268505] [2024-09-17 18:32:17,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:17,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-17 18:32:17,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:17,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-17 18:32:17,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:32:17,314 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 18:32:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:17,464 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2024-09-17 18:32:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:32:17,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-09-17 18:32:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:17,467 INFO L225 Difference]: With dead ends: 99 [2024-09-17 18:32:17,468 INFO L226 Difference]: Without dead ends: 92 [2024-09-17 18:32:17,469 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:32:17,470 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 60 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:17,471 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 267 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:32:17,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-17 18:32:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2024-09-17 18:32:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:32:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2024-09-17 18:32:17,489 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 27 [2024-09-17 18:32:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:17,489 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2024-09-17 18:32:17,489 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 18:32:17,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2024-09-17 18:32:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-17 18:32:17,490 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:17,491 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:17,504 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 18:32:17,694 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:17,695 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:17,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash -849404633, now seen corresponding path program 1 times [2024-09-17 18:32:17,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:17,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069486475] [2024-09-17 18:32:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:17,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:17,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220253839] [2024-09-17 18:32:17,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:17,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:17,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:17,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:17,719 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 18:32:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:17,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:32:17,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:32:17,805 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:32:17,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:17,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069486475] [2024-09-17 18:32:17,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:17,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220253839] [2024-09-17 18:32:17,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220253839] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:17,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:32:17,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:32:17,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514930693] [2024-09-17 18:32:17,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:17,807 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:32:17,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:17,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:32:17,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:32:17,808 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 18:32:17,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:17,849 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2024-09-17 18:32:17,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:32:17,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-09-17 18:32:17,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:17,851 INFO L225 Difference]: With dead ends: 75 [2024-09-17 18:32:17,851 INFO L226 Difference]: Without dead ends: 73 [2024-09-17 18:32:17,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:32:17,852 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:17,852 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:32:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-17 18:32:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-09-17 18:32:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:32:17,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2024-09-17 18:32:17,865 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 30 [2024-09-17 18:32:17,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:17,865 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2024-09-17 18:32:17,865 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 18:32:17,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:17,865 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2024-09-17 18:32:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-17 18:32:17,866 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:17,866 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:17,880 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 18:32:18,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:18,071 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:18,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:18,071 INFO L85 PathProgramCache]: Analyzing trace with hash -570934993, now seen corresponding path program 1 times [2024-09-17 18:32:18,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:18,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650047303] [2024-09-17 18:32:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:18,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:18,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114776729] [2024-09-17 18:32:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:18,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:18,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:18,096 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:18,097 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 18:32:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-17 18:32:18,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:32:18,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:32:18,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:18,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650047303] [2024-09-17 18:32:18,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:18,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114776729] [2024-09-17 18:32:18,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114776729] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:18,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:32:18,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-09-17 18:32:18,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703852790] [2024-09-17 18:32:18,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:18,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-17 18:32:18,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:18,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-17 18:32:18,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:32:18,299 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-17 18:32:18,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:18,422 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2024-09-17 18:32:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:32:18,423 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2024-09-17 18:32:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:18,424 INFO L225 Difference]: With dead ends: 107 [2024-09-17 18:32:18,424 INFO L226 Difference]: Without dead ends: 105 [2024-09-17 18:32:18,424 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-17 18:32:18,424 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 20 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:18,425 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 243 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:32:18,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-17 18:32:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2024-09-17 18:32:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-17 18:32:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2024-09-17 18:32:18,443 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 30 [2024-09-17 18:32:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:18,443 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2024-09-17 18:32:18,443 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-17 18:32:18,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2024-09-17 18:32:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-17 18:32:18,444 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:18,444 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:18,457 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 18:32:18,648 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:18,649 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:18,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:18,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1950278233, now seen corresponding path program 1 times [2024-09-17 18:32:18,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:18,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409865595] [2024-09-17 18:32:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:18,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:18,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865921204] [2024-09-17 18:32:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:18,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:18,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:18,662 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:18,663 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 18:32:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:32:18,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-17 18:32:18,730 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:32:18,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:18,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409865595] [2024-09-17 18:32:18,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:18,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865921204] [2024-09-17 18:32:18,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865921204] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:18,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:32:18,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:32:18,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640388624] [2024-09-17 18:32:18,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:18,731 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:32:18,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:32:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:32:18,732 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:32:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:18,785 INFO L93 Difference]: Finished difference Result 147 states and 207 transitions. [2024-09-17 18:32:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:32:18,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2024-09-17 18:32:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:18,787 INFO L225 Difference]: With dead ends: 147 [2024-09-17 18:32:18,787 INFO L226 Difference]: Without dead ends: 145 [2024-09-17 18:32:18,787 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:32:18,788 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:18,788 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:32:18,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-17 18:32:18,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2024-09-17 18:32:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 45 states have call successors, (45), 8 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-17 18:32:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 199 transitions. [2024-09-17 18:32:18,811 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 199 transitions. Word has length 35 [2024-09-17 18:32:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:18,812 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 199 transitions. [2024-09-17 18:32:18,812 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:32:18,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 199 transitions. [2024-09-17 18:32:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-17 18:32:18,813 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:18,813 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:18,829 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 18:32:19,014 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-17 18:32:19,015 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:19,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash -939315489, now seen corresponding path program 1 times [2024-09-17 18:32:19,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:19,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359757665] [2024-09-17 18:32:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:19,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:19,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666055185] [2024-09-17 18:32:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:19,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:19,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:19,052 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:19,062 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 18:32:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:19,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-17 18:32:19,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:32:19,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:19,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:19,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359757665] [2024-09-17 18:32:19,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:19,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666055185] [2024-09-17 18:32:19,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666055185] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:19,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:32:19,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-17 18:32:19,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581361398] [2024-09-17 18:32:19,253 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:19,253 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:32:19,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:19,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:32:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-17 18:32:19,254 INFO L87 Difference]: Start difference. First operand 139 states and 199 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 18:32:19,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:19,388 INFO L93 Difference]: Finished difference Result 152 states and 210 transitions. [2024-09-17 18:32:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:32:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-09-17 18:32:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:19,390 INFO L225 Difference]: With dead ends: 152 [2024-09-17 18:32:19,391 INFO L226 Difference]: Without dead ends: 150 [2024-09-17 18:32:19,391 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:32:19,391 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:19,392 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 191 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:32:19,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-17 18:32:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2024-09-17 18:32:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 93 states have internal predecessors, (117), 45 states have call successors, (45), 10 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-17 18:32:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 205 transitions. [2024-09-17 18:32:19,423 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 205 transitions. Word has length 35 [2024-09-17 18:32:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:19,423 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 205 transitions. [2024-09-17 18:32:19,423 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 18:32:19,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 205 transitions. [2024-09-17 18:32:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-17 18:32:19,424 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:19,425 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:19,439 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-17 18:32:19,628 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:19,629 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:19,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:19,630 INFO L85 PathProgramCache]: Analyzing trace with hash -660845849, now seen corresponding path program 2 times [2024-09-17 18:32:19,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:19,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979122538] [2024-09-17 18:32:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:19,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:19,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:32:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:19,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:32:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:19,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:32:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:32:19,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:19,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979122538] [2024-09-17 18:32:19,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979122538] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:19,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:32:19,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:32:19,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949760474] [2024-09-17 18:32:19,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:19,677 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:32:19,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:19,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:32:19,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:32:19,678 INFO L87 Difference]: Start difference. First operand 147 states and 205 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-17 18:32:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:19,750 INFO L93 Difference]: Finished difference Result 186 states and 257 transitions. [2024-09-17 18:32:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:32:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-09-17 18:32:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:19,752 INFO L225 Difference]: With dead ends: 186 [2024-09-17 18:32:19,752 INFO L226 Difference]: Without dead ends: 130 [2024-09-17 18:32:19,753 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:32:19,753 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 18 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:19,754 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 148 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:32:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-17 18:32:19,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2024-09-17 18:32:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 76 states have internal predecessors, (91), 37 states have call successors, (37), 10 states have call predecessors, (37), 9 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-17 18:32:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 163 transitions. [2024-09-17 18:32:19,771 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 163 transitions. Word has length 35 [2024-09-17 18:32:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:19,771 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 163 transitions. [2024-09-17 18:32:19,772 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-17 18:32:19,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 163 transitions. [2024-09-17 18:32:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-17 18:32:19,773 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:19,773 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:19,773 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-17 18:32:19,773 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:19,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:19,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1428718823, now seen corresponding path program 1 times [2024-09-17 18:32:19,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:19,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802548728] [2024-09-17 18:32:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:19,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:19,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722826333] [2024-09-17 18:32:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:19,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:19,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:19,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:19,784 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 18:32:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:19,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:32:19,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-17 18:32:19,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:32:19,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:19,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802548728] [2024-09-17 18:32:19,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:19,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722826333] [2024-09-17 18:32:19,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722826333] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:19,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:32:19,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:32:19,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585452598] [2024-09-17 18:32:19,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:19,848 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:32:19,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:32:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:32:19,848 INFO L87 Difference]: Start difference. First operand 122 states and 163 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-17 18:32:19,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:19,921 INFO L93 Difference]: Finished difference Result 180 states and 260 transitions. [2024-09-17 18:32:19,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:32:19,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2024-09-17 18:32:19,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:19,923 INFO L225 Difference]: With dead ends: 180 [2024-09-17 18:32:19,923 INFO L226 Difference]: Without dead ends: 178 [2024-09-17 18:32:19,923 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:32:19,924 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:19,924 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:32:19,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-09-17 18:32:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2024-09-17 18:32:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 86 states have (on average 1.186046511627907) internal successors, (102), 95 states have internal predecessors, (102), 69 states have call successors, (69), 11 states have call predecessors, (69), 10 states have return successors, (67), 59 states have call predecessors, (67), 67 states have call successors, (67) [2024-09-17 18:32:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 238 transitions. [2024-09-17 18:32:19,950 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 238 transitions. Word has length 40 [2024-09-17 18:32:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:19,951 INFO L474 AbstractCegarLoop]: Abstraction has 166 states and 238 transitions. [2024-09-17 18:32:19,951 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-17 18:32:19,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:19,951 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 238 transitions. [2024-09-17 18:32:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-17 18:32:19,952 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:19,952 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:19,968 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 18:32:20,156 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:20,157 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:20,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:20,158 INFO L85 PathProgramCache]: Analyzing trace with hash -262492089, now seen corresponding path program 1 times [2024-09-17 18:32:20,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:20,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406836199] [2024-09-17 18:32:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:20,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:20,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621686111] [2024-09-17 18:32:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:20,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:20,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:20,171 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:20,172 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 18:32:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:20,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-17 18:32:20,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-17 18:32:20,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-17 18:32:21,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:21,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406836199] [2024-09-17 18:32:21,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:21,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621686111] [2024-09-17 18:32:21,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621686111] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:21,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:32:21,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-17 18:32:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245423448] [2024-09-17 18:32:21,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:21,956 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-17 18:32:21,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-17 18:32:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-09-17 18:32:21,957 INFO L87 Difference]: Start difference. First operand 166 states and 238 transitions. Second operand has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-17 18:32:25,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:25,260 INFO L93 Difference]: Finished difference Result 445 states and 663 transitions. [2024-09-17 18:32:25,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-17 18:32:25,260 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 52 [2024-09-17 18:32:25,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:25,264 INFO L225 Difference]: With dead ends: 445 [2024-09-17 18:32:25,265 INFO L226 Difference]: Without dead ends: 342 [2024-09-17 18:32:25,266 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-09-17 18:32:25,267 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 170 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:25,267 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 408 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-17 18:32:25,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-09-17 18:32:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 256. [2024-09-17 18:32:25,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 149 states have (on average 1.2080536912751678) internal successors, (180), 156 states have internal predecessors, (180), 93 states have call successors, (93), 14 states have call predecessors, (93), 13 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-17 18:32:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 364 transitions. [2024-09-17 18:32:25,382 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 364 transitions. Word has length 52 [2024-09-17 18:32:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:25,382 INFO L474 AbstractCegarLoop]: Abstraction has 256 states and 364 transitions. [2024-09-17 18:32:25,382 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-17 18:32:25,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:25,382 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 364 transitions. [2024-09-17 18:32:25,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-17 18:32:25,383 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:25,383 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:25,401 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-17 18:32:25,587 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:25,588 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:25,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:25,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1924337224, now seen corresponding path program 1 times [2024-09-17 18:32:25,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:25,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357518654] [2024-09-17 18:32:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:25,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:25,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931304263] [2024-09-17 18:32:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:25,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:25,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:25,605 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:25,608 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 18:32:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:25,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-17 18:32:25,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-09-17 18:32:25,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-17 18:32:25,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:25,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357518654] [2024-09-17 18:32:25,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:25,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931304263] [2024-09-17 18:32:25,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931304263] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:25,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:32:25,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-17 18:32:25,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163130762] [2024-09-17 18:32:25,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:25,768 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:32:25,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:25,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:32:25,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:32:25,769 INFO L87 Difference]: Start difference. First operand 256 states and 364 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-17 18:32:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:25,958 INFO L93 Difference]: Finished difference Result 262 states and 369 transitions. [2024-09-17 18:32:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:32:25,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 62 [2024-09-17 18:32:25,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:25,963 INFO L225 Difference]: With dead ends: 262 [2024-09-17 18:32:25,964 INFO L226 Difference]: Without dead ends: 260 [2024-09-17 18:32:25,964 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-17 18:32:25,965 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:25,965 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 115 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:32:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-09-17 18:32:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2024-09-17 18:32:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 159 states have internal predecessors, (183), 93 states have call successors, (93), 15 states have call predecessors, (93), 14 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-17 18:32:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 367 transitions. [2024-09-17 18:32:26,126 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 367 transitions. Word has length 62 [2024-09-17 18:32:26,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:26,126 INFO L474 AbstractCegarLoop]: Abstraction has 260 states and 367 transitions. [2024-09-17 18:32:26,126 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-17 18:32:26,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:26,126 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 367 transitions. [2024-09-17 18:32:26,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-17 18:32:26,127 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:26,127 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:26,144 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-17 18:32:26,327 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-17 18:32:26,328 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:26,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:26,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1180380411, now seen corresponding path program 1 times [2024-09-17 18:32:26,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:26,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819984767] [2024-09-17 18:32:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:26,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:26,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709975893] [2024-09-17 18:32:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:26,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:26,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:26,358 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:26,362 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 18:32:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:26,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-17 18:32:26,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-17 18:32:26,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:26,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:26,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819984767] [2024-09-17 18:32:26,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:26,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709975893] [2024-09-17 18:32:26,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709975893] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:26,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:32:26,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-17 18:32:26,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377207323] [2024-09-17 18:32:26,992 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:26,993 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 18:32:26,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:26,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 18:32:26,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-09-17 18:32:26,996 INFO L87 Difference]: Start difference. First operand 260 states and 367 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-17 18:32:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:27,665 INFO L93 Difference]: Finished difference Result 318 states and 454 transitions. [2024-09-17 18:32:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 18:32:27,666 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2024-09-17 18:32:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:27,669 INFO L225 Difference]: With dead ends: 318 [2024-09-17 18:32:27,670 INFO L226 Difference]: Without dead ends: 316 [2024-09-17 18:32:27,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:32:27,671 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 83 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:27,671 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 443 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:32:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-17 18:32:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 311. [2024-09-17 18:32:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 178 states have (on average 1.2078651685393258) internal successors, (215), 188 states have internal predecessors, (215), 117 states have call successors, (117), 16 states have call predecessors, (117), 15 states have return successors, (115), 106 states have call predecessors, (115), 115 states have call successors, (115) [2024-09-17 18:32:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 447 transitions. [2024-09-17 18:32:27,849 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 447 transitions. Word has length 60 [2024-09-17 18:32:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:27,849 INFO L474 AbstractCegarLoop]: Abstraction has 311 states and 447 transitions. [2024-09-17 18:32:27,849 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-17 18:32:27,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:27,850 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 447 transitions. [2024-09-17 18:32:27,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-17 18:32:27,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:27,850 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:27,872 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-17 18:32:28,051 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-17 18:32:28,051 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:28,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:28,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1640416879, now seen corresponding path program 2 times [2024-09-17 18:32:28,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:28,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161696363] [2024-09-17 18:32:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:28,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:28,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:32:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:28,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:32:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:28,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:32:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:28,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:32:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:28,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:32:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:28,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:32:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:28,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:32:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:28,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:32:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:28,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:32:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-17 18:32:28,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:28,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161696363] [2024-09-17 18:32:28,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161696363] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:28,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:32:28,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:32:28,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007426624] [2024-09-17 18:32:28,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:28,147 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:32:28,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:28,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:32:28,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:32:28,148 INFO L87 Difference]: Start difference. First operand 311 states and 447 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-17 18:32:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:28,333 INFO L93 Difference]: Finished difference Result 534 states and 771 transitions. [2024-09-17 18:32:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:32:28,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2024-09-17 18:32:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:28,337 INFO L225 Difference]: With dead ends: 534 [2024-09-17 18:32:28,340 INFO L226 Difference]: Without dead ends: 320 [2024-09-17 18:32:28,342 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:32:28,342 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:28,342 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 109 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:32:28,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-09-17 18:32:28,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 308. [2024-09-17 18:32:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 183 states have (on average 1.2076502732240437) internal successors, (221), 184 states have internal predecessors, (221), 109 states have call successors, (109), 16 states have call predecessors, (109), 15 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-17 18:32:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 437 transitions. [2024-09-17 18:32:28,452 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 437 transitions. Word has length 65 [2024-09-17 18:32:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:28,453 INFO L474 AbstractCegarLoop]: Abstraction has 308 states and 437 transitions. [2024-09-17 18:32:28,453 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-17 18:32:28,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 437 transitions. [2024-09-17 18:32:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-17 18:32:28,454 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:28,454 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:28,454 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-09-17 18:32:28,454 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:28,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:28,454 INFO L85 PathProgramCache]: Analyzing trace with hash -629454135, now seen corresponding path program 3 times [2024-09-17 18:32:28,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:28,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875111745] [2024-09-17 18:32:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:28,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:28,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488105166] [2024-09-17 18:32:28,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:32:28,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:28,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:28,486 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:28,487 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 18:32:28,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 18:32:28,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:32:28,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-17 18:32:28,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-17 18:32:29,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:33,555 WARN L854 $PredicateComparison]: unable to prove that (or (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~x~0 c_main_~k~0) c_main_~c~0 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (forall ((v_main_~p~0_23 Int) (v_main_~r~0_23 Int)) (or (< (+ (* v_main_~p~0_23 c_main_~x~0) (* v_main_~r~0_23 c_main_~y~0)) c_main_~b~0) (< c_main_~q~0 v_main_~p~0_23) (< c_main_~s~0 v_main_~r~0_23)))) is different from false [2024-09-17 18:32:34,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:34,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875111745] [2024-09-17 18:32:34,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:34,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488105166] [2024-09-17 18:32:34,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488105166] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:34,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:32:34,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-17 18:32:34,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439949783] [2024-09-17 18:32:34,197 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:34,197 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 18:32:34,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:34,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 18:32:34,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=462, Unknown=1, NotChecked=44, Total=600 [2024-09-17 18:32:34,198 INFO L87 Difference]: Start difference. First operand 308 states and 437 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-17 18:32:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:34,876 INFO L93 Difference]: Finished difference Result 336 states and 461 transitions. [2024-09-17 18:32:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 18:32:34,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 65 [2024-09-17 18:32:34,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:34,879 INFO L225 Difference]: With dead ends: 336 [2024-09-17 18:32:34,879 INFO L226 Difference]: Without dead ends: 334 [2024-09-17 18:32:34,881 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=155, Invalid=778, Unknown=1, NotChecked=58, Total=992 [2024-09-17 18:32:34,882 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 65 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:34,882 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 441 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:32:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2024-09-17 18:32:35,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 324. [2024-09-17 18:32:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 196 states have internal predecessors, (233), 109 states have call successors, (109), 20 states have call predecessors, (109), 19 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-17 18:32:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 449 transitions. [2024-09-17 18:32:35,004 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 449 transitions. Word has length 65 [2024-09-17 18:32:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:35,004 INFO L474 AbstractCegarLoop]: Abstraction has 324 states and 449 transitions. [2024-09-17 18:32:35,004 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-17 18:32:35,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:35,004 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 449 transitions. [2024-09-17 18:32:35,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-17 18:32:35,005 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:35,005 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:35,017 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-17 18:32:35,209 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-17 18:32:35,209 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:35,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:35,210 INFO L85 PathProgramCache]: Analyzing trace with hash -232813088, now seen corresponding path program 1 times [2024-09-17 18:32:35,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:35,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518980630] [2024-09-17 18:32:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:35,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:35,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147716879] [2024-09-17 18:32:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:35,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:35,225 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:35,226 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-17 18:32:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:35,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-17 18:32:35,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-17 18:32:36,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:37,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:37,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518980630] [2024-09-17 18:32:37,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:37,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147716879] [2024-09-17 18:32:37,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147716879] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:37,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:32:37,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-17 18:32:37,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222485065] [2024-09-17 18:32:37,595 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:37,595 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:32:37,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:37,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:32:37,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-09-17 18:32:37,596 INFO L87 Difference]: Start difference. First operand 324 states and 449 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-17 18:32:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:38,634 INFO L93 Difference]: Finished difference Result 400 states and 561 transitions. [2024-09-17 18:32:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:32:38,634 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 79 [2024-09-17 18:32:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:38,636 INFO L225 Difference]: With dead ends: 400 [2024-09-17 18:32:38,636 INFO L226 Difference]: Without dead ends: 397 [2024-09-17 18:32:38,637 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 18:32:38,637 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 90 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:38,637 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 537 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-17 18:32:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-09-17 18:32:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 385. [2024-09-17 18:32:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 226 states have (on average 1.2079646017699115) internal successors, (273), 227 states have internal predecessors, (273), 137 states have call successors, (137), 22 states have call predecessors, (137), 21 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2024-09-17 18:32:38,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 545 transitions. [2024-09-17 18:32:38,779 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 545 transitions. Word has length 79 [2024-09-17 18:32:38,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:38,779 INFO L474 AbstractCegarLoop]: Abstraction has 385 states and 545 transitions. [2024-09-17 18:32:38,780 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-17 18:32:38,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:38,780 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 545 transitions. [2024-09-17 18:32:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-17 18:32:38,781 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:38,781 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:38,793 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-17 18:32:38,981 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-17 18:32:38,981 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:38,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:38,982 INFO L85 PathProgramCache]: Analyzing trace with hash -203814726, now seen corresponding path program 1 times [2024-09-17 18:32:38,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:38,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082604315] [2024-09-17 18:32:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:38,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:38,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873937732] [2024-09-17 18:32:38,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:38,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:38,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:38,992 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:38,993 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-17 18:32:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:39,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-17 18:32:39,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-17 18:32:39,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-09-17 18:32:39,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:39,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082604315] [2024-09-17 18:32:39,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:39,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873937732] [2024-09-17 18:32:39,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873937732] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:39,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:32:39,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-17 18:32:39,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235595584] [2024-09-17 18:32:39,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:39,576 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:32:39,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:39,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:32:39,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:32:39,576 INFO L87 Difference]: Start difference. First operand 385 states and 545 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-17 18:32:40,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:40,933 INFO L93 Difference]: Finished difference Result 885 states and 1384 transitions. [2024-09-17 18:32:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:32:40,933 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 82 [2024-09-17 18:32:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:40,939 INFO L225 Difference]: With dead ends: 885 [2024-09-17 18:32:40,940 INFO L226 Difference]: Without dead ends: 883 [2024-09-17 18:32:40,941 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 18:32:40,941 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 148 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:40,942 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 436 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 18:32:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2024-09-17 18:32:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 829. [2024-09-17 18:32:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 403 states have (on average 1.3101736972704714) internal successors, (528), 404 states have internal predecessors, (528), 401 states have call successors, (401), 25 states have call predecessors, (401), 24 states have return successors, (399), 399 states have call predecessors, (399), 399 states have call successors, (399) [2024-09-17 18:32:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1328 transitions. [2024-09-17 18:32:41,379 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1328 transitions. Word has length 82 [2024-09-17 18:32:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:41,379 INFO L474 AbstractCegarLoop]: Abstraction has 829 states and 1328 transitions. [2024-09-17 18:32:41,379 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-17 18:32:41,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1328 transitions. [2024-09-17 18:32:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-17 18:32:41,381 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:41,381 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:41,395 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-17 18:32:41,582 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-17 18:32:41,585 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:41,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:41,585 INFO L85 PathProgramCache]: Analyzing trace with hash 807148018, now seen corresponding path program 1 times [2024-09-17 18:32:41,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:41,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516454647] [2024-09-17 18:32:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:41,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:41,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537590343] [2024-09-17 18:32:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:41,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:41,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:41,606 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:41,608 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-17 18:32:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:41,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-17 18:32:41,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-17 18:32:42,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-09-17 18:32:43,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:43,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516454647] [2024-09-17 18:32:43,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:43,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537590343] [2024-09-17 18:32:43,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537590343] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:43,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:32:43,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-17 18:32:43,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939251429] [2024-09-17 18:32:43,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:43,532 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-17 18:32:43,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-17 18:32:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-09-17 18:32:43,535 INFO L87 Difference]: Start difference. First operand 829 states and 1328 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-17 18:32:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:51,986 INFO L93 Difference]: Finished difference Result 1191 states and 1920 transitions. [2024-09-17 18:32:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-17 18:32:51,987 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 82 [2024-09-17 18:32:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:52,003 INFO L225 Difference]: With dead ends: 1191 [2024-09-17 18:32:52,006 INFO L226 Difference]: Without dead ends: 1189 [2024-09-17 18:32:52,008 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=711, Invalid=2829, Unknown=0, NotChecked=0, Total=3540 [2024-09-17 18:32:52,008 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 160 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:52,008 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 719 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-09-17 18:32:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2024-09-17 18:32:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1060. [2024-09-17 18:32:52,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 511 states have (on average 1.3228962818003913) internal successors, (676), 512 states have internal predecessors, (676), 521 states have call successors, (521), 28 states have call predecessors, (521), 27 states have return successors, (519), 519 states have call predecessors, (519), 519 states have call successors, (519) [2024-09-17 18:32:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1716 transitions. [2024-09-17 18:32:52,910 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1716 transitions. Word has length 82 [2024-09-17 18:32:52,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:52,910 INFO L474 AbstractCegarLoop]: Abstraction has 1060 states and 1716 transitions. [2024-09-17 18:32:52,910 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-17 18:32:52,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:52,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1716 transitions. [2024-09-17 18:32:52,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-17 18:32:52,911 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:52,912 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:52,924 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-17 18:32:53,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-17 18:32:53,116 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:53,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:53,116 INFO L85 PathProgramCache]: Analyzing trace with hash 590263059, now seen corresponding path program 4 times [2024-09-17 18:32:53,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:53,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535370108] [2024-09-17 18:32:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:53,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:53,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210514810] [2024-09-17 18:32:53,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:32:53,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:53,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:53,140 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:32:53,143 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-17 18:32:53,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:32:53,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:32:53,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:32:53,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-17 18:32:54,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-17 18:32:55,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:55,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535370108] [2024-09-17 18:32:55,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:55,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210514810] [2024-09-17 18:32:55,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210514810] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:55,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:32:55,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2024-09-17 18:32:55,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741688482] [2024-09-17 18:32:55,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:55,552 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:32:55,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:55,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:32:55,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:32:55,553 INFO L87 Difference]: Start difference. First operand 1060 states and 1716 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-17 18:33:00,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:00,795 INFO L93 Difference]: Finished difference Result 1190 states and 1914 transitions. [2024-09-17 18:33:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:33:00,799 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 85 [2024-09-17 18:33:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:00,805 INFO L225 Difference]: With dead ends: 1190 [2024-09-17 18:33:00,805 INFO L226 Difference]: Without dead ends: 1188 [2024-09-17 18:33:00,806 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 18:33:00,806 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 80 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:00,806 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 584 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-17 18:33:00,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2024-09-17 18:33:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1080. [2024-09-17 18:33:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 526 states have (on average 1.3136882129277567) internal successors, (691), 527 states have internal predecessors, (691), 521 states have call successors, (521), 33 states have call predecessors, (521), 32 states have return successors, (519), 519 states have call predecessors, (519), 519 states have call successors, (519) [2024-09-17 18:33:01,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1731 transitions. [2024-09-17 18:33:01,662 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1731 transitions. Word has length 85 [2024-09-17 18:33:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:01,662 INFO L474 AbstractCegarLoop]: Abstraction has 1080 states and 1731 transitions. [2024-09-17 18:33:01,663 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-17 18:33:01,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1731 transitions. [2024-09-17 18:33:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-17 18:33:01,664 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:01,664 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:01,683 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-17 18:33:01,868 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:01,869 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:01,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:01,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1412818839, now seen corresponding path program 2 times [2024-09-17 18:33:01,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:01,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820197190] [2024-09-17 18:33:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:01,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:02,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:33:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:02,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:33:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:02,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:33:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:02,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:33:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:02,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:33:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:02,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:33:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:02,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:33:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:02,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:33:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:02,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:33:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:02,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:33:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:02,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:33:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:33:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-17 18:33:02,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:02,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820197190] [2024-09-17 18:33:02,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820197190] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:33:02,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825365177] [2024-09-17 18:33:02,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:33:02,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:02,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:02,056 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:33:02,064 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-17 18:33:02,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:33:02,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:02,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-17 18:33:02,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-17 18:33:02,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-17 18:33:02,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825365177] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:02,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:33:02,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-17 18:33:02,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066103423] [2024-09-17 18:33:02,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:02,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-17 18:33:02,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:02,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-17 18:33:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-17 18:33:02,249 INFO L87 Difference]: Start difference. First operand 1080 states and 1731 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-17 18:33:03,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:03,609 INFO L93 Difference]: Finished difference Result 1218 states and 1947 transitions. [2024-09-17 18:33:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-17 18:33:03,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2024-09-17 18:33:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:03,616 INFO L225 Difference]: With dead ends: 1218 [2024-09-17 18:33:03,616 INFO L226 Difference]: Without dead ends: 1211 [2024-09-17 18:33:03,616 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 194 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-09-17 18:33:03,617 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:03,617 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 404 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:33:03,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2024-09-17 18:33:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1049. [2024-09-17 18:33:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 503 states have (on average 1.320079522862823) internal successors, (664), 504 states have internal predecessors, (664), 513 states have call successors, (513), 33 states have call predecessors, (513), 32 states have return successors, (511), 511 states have call predecessors, (511), 511 states have call successors, (511) [2024-09-17 18:33:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1688 transitions. [2024-09-17 18:33:04,512 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1688 transitions. Word has length 87 [2024-09-17 18:33:04,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:04,512 INFO L474 AbstractCegarLoop]: Abstraction has 1049 states and 1688 transitions. [2024-09-17 18:33:04,512 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-17 18:33:04,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1688 transitions. [2024-09-17 18:33:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-17 18:33:04,514 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:04,514 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:04,527 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-17 18:33:04,714 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:04,715 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:04,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:04,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1409368955, now seen corresponding path program 5 times [2024-09-17 18:33:04,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:04,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320172934] [2024-09-17 18:33:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:04,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:04,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843582793] [2024-09-17 18:33:04,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:33:04,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:04,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:04,736 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:33:04,742 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-17 18:33:05,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-17 18:33:05,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:05,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-17 18:33:05,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-17 18:33:06,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:11,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:11,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320172934] [2024-09-17 18:33:11,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:11,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843582793] [2024-09-17 18:33:11,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843582793] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:33:11,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:33:11,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-17 18:33:11,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270468601] [2024-09-17 18:33:11,112 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:11,112 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 18:33:11,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:11,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 18:33:11,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:33:11,113 INFO L87 Difference]: Start difference. First operand 1049 states and 1688 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-17 18:33:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:13,319 INFO L93 Difference]: Finished difference Result 1186 states and 1894 transitions. [2024-09-17 18:33:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 18:33:13,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 90 [2024-09-17 18:33:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:13,327 INFO L225 Difference]: With dead ends: 1186 [2024-09-17 18:33:13,327 INFO L226 Difference]: Without dead ends: 1184 [2024-09-17 18:33:13,328 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 18:33:13,328 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 55 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:13,329 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 459 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 18:33:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2024-09-17 18:33:14,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1166. [2024-09-17 18:33:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 560 states have (on average 1.3178571428571428) internal successors, (738), 561 states have internal predecessors, (738), 569 states have call successors, (569), 37 states have call predecessors, (569), 36 states have return successors, (567), 567 states have call predecessors, (567), 567 states have call successors, (567) [2024-09-17 18:33:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1874 transitions. [2024-09-17 18:33:14,397 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1874 transitions. Word has length 90 [2024-09-17 18:33:14,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:14,397 INFO L474 AbstractCegarLoop]: Abstraction has 1166 states and 1874 transitions. [2024-09-17 18:33:14,397 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-17 18:33:14,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1874 transitions. [2024-09-17 18:33:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-17 18:33:14,399 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:14,399 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:14,407 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-17 18:33:14,602 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:14,603 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:14,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:14,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1093787319, now seen corresponding path program 2 times [2024-09-17 18:33:14,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:14,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066797703] [2024-09-17 18:33:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:14,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:14,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680659411] [2024-09-17 18:33:14,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:33:14,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:14,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:14,616 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:33:14,617 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-17 18:33:14,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:33:14,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:14,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-17 18:33:14,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-09-17 18:33:15,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-09-17 18:33:17,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:17,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066797703] [2024-09-17 18:33:17,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:17,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680659411] [2024-09-17 18:33:17,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680659411] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:17,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:33:17,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2024-09-17 18:33:17,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335290362] [2024-09-17 18:33:17,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:17,376 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 18:33:17,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:17,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 18:33:17,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:33:17,377 INFO L87 Difference]: Start difference. First operand 1166 states and 1874 transitions. Second operand has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-17 18:33:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:29,149 INFO L93 Difference]: Finished difference Result 1381 states and 2196 transitions. [2024-09-17 18:33:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-17 18:33:29,152 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 96 [2024-09-17 18:33:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:29,160 INFO L225 Difference]: With dead ends: 1381 [2024-09-17 18:33:29,160 INFO L226 Difference]: Without dead ends: 1373 [2024-09-17 18:33:29,162 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1128, Invalid=4572, Unknown=0, NotChecked=0, Total=5700 [2024-09-17 18:33:29,162 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 232 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:29,166 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 765 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-09-17 18:33:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2024-09-17 18:33:30,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1344. [2024-09-17 18:33:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 653 states have (on average 1.3169984686064318) internal successors, (860), 654 states have internal predecessors, (860), 649 states have call successors, (649), 42 states have call predecessors, (649), 41 states have return successors, (647), 647 states have call predecessors, (647), 647 states have call successors, (647) [2024-09-17 18:33:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 2156 transitions. [2024-09-17 18:33:30,400 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 2156 transitions. Word has length 96 [2024-09-17 18:33:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:30,401 INFO L474 AbstractCegarLoop]: Abstraction has 1344 states and 2156 transitions. [2024-09-17 18:33:30,401 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-17 18:33:30,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:30,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 2156 transitions. [2024-09-17 18:33:30,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-17 18:33:30,404 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:30,404 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:30,417 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-17 18:33:30,605 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-17 18:33:30,605 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:30,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash -187092685, now seen corresponding path program 6 times [2024-09-17 18:33:30,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:30,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348582761] [2024-09-17 18:33:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:30,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:30,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413821089] [2024-09-17 18:33:30,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:33:30,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:30,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:30,627 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:33:30,647 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-17 18:33:30,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-17 18:33:30,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:30,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-17 18:33:30,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-09-17 18:33:32,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:37,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:37,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348582761] [2024-09-17 18:33:37,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:37,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413821089] [2024-09-17 18:33:37,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413821089] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:33:37,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:33:37,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-17 18:33:37,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875987403] [2024-09-17 18:33:37,674 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:37,675 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-17 18:33:37,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:37,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-17 18:33:37,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=819, Unknown=1, NotChecked=0, Total=992 [2024-09-17 18:33:37,676 INFO L87 Difference]: Start difference. First operand 1344 states and 2156 transitions. Second operand has 22 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-17 18:33:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:42,315 INFO L93 Difference]: Finished difference Result 1474 states and 2358 transitions. [2024-09-17 18:33:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-17 18:33:42,315 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) Word has length 95 [2024-09-17 18:33:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:42,322 INFO L225 Difference]: With dead ends: 1474 [2024-09-17 18:33:42,322 INFO L226 Difference]: Without dead ends: 1472 [2024-09-17 18:33:42,323 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=386, Invalid=1593, Unknown=1, NotChecked=0, Total=1980 [2024-09-17 18:33:42,323 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 68 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:42,324 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 363 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-17 18:33:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2024-09-17 18:33:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1356. [2024-09-17 18:33:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 662 states have (on average 1.3126888217522659) internal successors, (869), 664 states have internal predecessors, (869), 651 states have call successors, (651), 43 states have call predecessors, (651), 42 states have return successors, (649), 648 states have call predecessors, (649), 649 states have call successors, (649) [2024-09-17 18:33:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 2169 transitions. [2024-09-17 18:33:43,619 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 2169 transitions. Word has length 95 [2024-09-17 18:33:43,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:43,620 INFO L474 AbstractCegarLoop]: Abstraction has 1356 states and 2169 transitions. [2024-09-17 18:33:43,620 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-17 18:33:43,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 2169 transitions. [2024-09-17 18:33:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-17 18:33:43,621 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:43,622 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:43,628 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-17 18:33:43,825 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-17 18:33:43,826 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:43,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1017703828, now seen corresponding path program 3 times [2024-09-17 18:33:43,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:43,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826115915] [2024-09-17 18:33:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:43,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:43,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848055915] [2024-09-17 18:33:43,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:33:43,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:43,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:43,841 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:33:43,842 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-17 18:33:43,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-17 18:33:43,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:43,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-17 18:33:43,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-09-17 18:33:44,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-09-17 18:33:48,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:48,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826115915] [2024-09-17 18:33:48,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848055915] [2024-09-17 18:33:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848055915] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:48,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:33:48,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2024-09-17 18:33:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035294206] [2024-09-17 18:33:48,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:48,919 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 18:33:48,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:48,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 18:33:48,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:33:48,920 INFO L87 Difference]: Start difference. First operand 1356 states and 2169 transitions. Second operand has 30 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-17 18:34:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:34:07,224 INFO L93 Difference]: Finished difference Result 2168 states and 3461 transitions. [2024-09-17 18:34:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-17 18:34:07,224 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 99 [2024-09-17 18:34:07,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:34:07,235 INFO L225 Difference]: With dead ends: 2168 [2024-09-17 18:34:07,235 INFO L226 Difference]: Without dead ends: 1621 [2024-09-17 18:34:07,244 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2737 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=1791, Invalid=7715, Unknown=0, NotChecked=0, Total=9506 [2024-09-17 18:34:07,244 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 255 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-09-17 18:34:07,244 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 761 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-09-17 18:34:07,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2024-09-17 18:34:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1481. [2024-09-17 18:34:08,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 723 states have (on average 1.3084370677731674) internal successors, (946), 725 states have internal predecessors, (946), 711 states have call successors, (711), 47 states have call predecessors, (711), 46 states have return successors, (709), 708 states have call predecessors, (709), 709 states have call successors, (709) [2024-09-17 18:34:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2366 transitions. [2024-09-17 18:34:08,962 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2366 transitions. Word has length 99 [2024-09-17 18:34:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:34:08,962 INFO L474 AbstractCegarLoop]: Abstraction has 1481 states and 2366 transitions. [2024-09-17 18:34:08,963 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-17 18:34:08,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2366 transitions. [2024-09-17 18:34:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:34:08,964 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:34:08,964 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:34:08,971 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-17 18:34:09,168 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-17 18:34:09,169 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:34:09,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:09,169 INFO L85 PathProgramCache]: Analyzing trace with hash -396138734, now seen corresponding path program 4 times [2024-09-17 18:34:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:34:09,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406967276] [2024-09-17 18:34:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:34:09,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:34:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:34:09,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352117420] [2024-09-17 18:34:09,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:34:09,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:34:09,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:34:09,196 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:34:09,200 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-17 18:34:09,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:34:09,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:34:09,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-17 18:34:09,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:34:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 52 proven. 46 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-17 18:34:11,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:34:25,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:34:25,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406967276] [2024-09-17 18:34:25,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:34:25,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352117420] [2024-09-17 18:34:25,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352117420] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:34:25,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:34:25,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-17 18:34:25,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535524329] [2024-09-17 18:34:25,687 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:34:25,688 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-17 18:34:25,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:34:25,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-17 18:34:25,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1171, Unknown=2, NotChecked=0, Total=1332 [2024-09-17 18:34:25,689 INFO L87 Difference]: Start difference. First operand 1481 states and 2366 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-17 18:34:30,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:34:30,069 INFO L93 Difference]: Finished difference Result 1613 states and 2569 transitions. [2024-09-17 18:34:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:34:30,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 104 [2024-09-17 18:34:30,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:34:30,078 INFO L225 Difference]: With dead ends: 1613 [2024-09-17 18:34:30,078 INFO L226 Difference]: Without dead ends: 1606 [2024-09-17 18:34:30,079 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=286, Invalid=1968, Unknown=2, NotChecked=0, Total=2256 [2024-09-17 18:34:30,079 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 84 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:34:30,080 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 711 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-17 18:34:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2024-09-17 18:34:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1485. [2024-09-17 18:34:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 726 states have (on average 1.3071625344352618) internal successors, (949), 728 states have internal predecessors, (949), 711 states have call successors, (711), 48 states have call predecessors, (711), 47 states have return successors, (709), 708 states have call predecessors, (709), 709 states have call successors, (709) [2024-09-17 18:34:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2369 transitions. [2024-09-17 18:34:31,751 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2369 transitions. Word has length 104 [2024-09-17 18:34:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:34:31,752 INFO L474 AbstractCegarLoop]: Abstraction has 1485 states and 2369 transitions. [2024-09-17 18:34:31,752 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-17 18:34:31,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:31,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2369 transitions. [2024-09-17 18:34:31,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-17 18:34:31,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:34:31,754 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:34:31,767 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-17 18:34:31,958 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-17 18:34:31,959 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:34:31,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:31,959 INFO L85 PathProgramCache]: Analyzing trace with hash 920643019, now seen corresponding path program 2 times [2024-09-17 18:34:31,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:34:31,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078432705] [2024-09-17 18:34:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:34:31,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:34:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:34:31,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580526847] [2024-09-17 18:34:31,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:34:31,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:34:31,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:34:31,995 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:34:31,999 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-17 18:34:32,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:34:32,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:34:32,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-17 18:34:32,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:34:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 52 proven. 56 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-09-17 18:34:33,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:34:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 56 proven. 52 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-09-17 18:34:44,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:34:44,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078432705] [2024-09-17 18:34:44,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:34:44,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580526847] [2024-09-17 18:34:44,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580526847] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:34:44,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:34:44,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2024-09-17 18:34:44,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26814082] [2024-09-17 18:34:44,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:34:44,224 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 18:34:44,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:34:44,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 18:34:44,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:34:44,225 INFO L87 Difference]: Start difference. First operand 1485 states and 2369 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-17 18:35:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:35:02,716 INFO L93 Difference]: Finished difference Result 1742 states and 2731 transitions. [2024-09-17 18:35:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-17 18:35:02,716 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 109 [2024-09-17 18:35:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:35:02,731 INFO L225 Difference]: With dead ends: 1742 [2024-09-17 18:35:02,735 INFO L226 Difference]: Without dead ends: 1740 [2024-09-17 18:35:02,737 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2024-09-17 18:35:02,737 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 180 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-17 18:35:02,738 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 812 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-09-17 18:35:02,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2024-09-17 18:35:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1596. [2024-09-17 18:35:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 809 states have (on average 1.2941903584672436) internal successors, (1047), 814 states have internal predecessors, (1047), 733 states have call successors, (733), 54 states have call predecessors, (733), 53 states have return successors, (731), 727 states have call predecessors, (731), 731 states have call successors, (731) [2024-09-17 18:35:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2511 transitions. [2024-09-17 18:35:04,934 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2511 transitions. Word has length 109 [2024-09-17 18:35:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:35:04,935 INFO L474 AbstractCegarLoop]: Abstraction has 1596 states and 2511 transitions. [2024-09-17 18:35:04,935 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-17 18:35:04,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:35:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2511 transitions. [2024-09-17 18:35:04,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-17 18:35:04,937 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:35:04,937 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:35:04,949 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-17 18:35:05,141 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-17 18:35:05,141 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:35:05,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:35:05,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2081223370, now seen corresponding path program 5 times [2024-09-17 18:35:05,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:35:05,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138633836] [2024-09-17 18:35:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:35:05,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:35:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:35:05,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832318372] [2024-09-17 18:35:05,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:35:05,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:35:05,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:35:05,165 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:35:05,167 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-17 18:35:05,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-17 18:35:05,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:35:05,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-17 18:35:05,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:35:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-17 18:35:06,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:35:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2024-09-17 18:35:12,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:35:12,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138633836] [2024-09-17 18:35:12,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:35:12,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832318372] [2024-09-17 18:35:12,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832318372] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:35:12,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:35:12,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2024-09-17 18:35:12,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234924463] [2024-09-17 18:35:12,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:35:12,163 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-17 18:35:12,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:35:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-17 18:35:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 18:35:12,164 INFO L87 Difference]: Start difference. First operand 1596 states and 2511 transitions. Second operand has 34 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-17 18:35:43,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-17 18:35:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:35:51,557 INFO L93 Difference]: Finished difference Result 1788 states and 2773 transitions. [2024-09-17 18:35:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-09-17 18:35:51,558 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 109 [2024-09-17 18:35:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:35:51,565 INFO L225 Difference]: With dead ends: 1788 [2024-09-17 18:35:51,565 INFO L226 Difference]: Without dead ends: 1784 [2024-09-17 18:35:51,567 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=1369, Invalid=5770, Unknown=1, NotChecked=0, Total=7140 [2024-09-17 18:35:51,567 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 287 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 338 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:35:51,568 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 961 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1426 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2024-09-17 18:35:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2024-09-17 18:35:54,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1695. [2024-09-17 18:35:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 853 states have (on average 1.2919109026963658) internal successors, (1102), 858 states have internal predecessors, (1102), 781 states have call successors, (781), 61 states have call predecessors, (781), 60 states have return successors, (779), 775 states have call predecessors, (779), 779 states have call successors, (779) [2024-09-17 18:35:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2662 transitions. [2024-09-17 18:35:54,554 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2662 transitions. Word has length 109 [2024-09-17 18:35:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:35:54,554 INFO L474 AbstractCegarLoop]: Abstraction has 1695 states and 2662 transitions. [2024-09-17 18:35:54,554 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-17 18:35:54,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:35:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2662 transitions. [2024-09-17 18:35:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-17 18:35:54,557 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:35:54,557 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:35:54,566 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-17 18:35:54,761 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-17 18:35:54,762 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:35:54,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:35:54,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1733684403, now seen corresponding path program 6 times [2024-09-17 18:35:54,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:35:54,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192713278] [2024-09-17 18:35:54,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:35:54,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:35:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:35:54,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763047787] [2024-09-17 18:35:54,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:35:54,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:35:54,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:35:54,789 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:35:54,793 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-17 18:35:54,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-17 18:35:54,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:35:54,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-17 18:35:54,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:35:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 95 proven. 67 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2024-09-17 18:35:56,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:35:57,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:35:57,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192713278] [2024-09-17 18:35:57,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:35:57,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763047787] [2024-09-17 18:35:57,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763047787] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:35:57,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:35:57,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-17 18:35:57,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308736869] [2024-09-17 18:35:57,968 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:35:57,969 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 18:35:57,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:35:57,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 18:35:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-09-17 18:35:57,970 INFO L87 Difference]: Start difference. First operand 1695 states and 2662 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-17 18:36:02,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:36:02,819 INFO L93 Difference]: Finished difference Result 2006 states and 3144 transitions. [2024-09-17 18:36:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-17 18:36:02,820 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 126 [2024-09-17 18:36:02,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:36:02,828 INFO L225 Difference]: With dead ends: 2006 [2024-09-17 18:36:02,828 INFO L226 Difference]: Without dead ends: 2003 [2024-09-17 18:36:02,829 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2024-09-17 18:36:02,830 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 64 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:36:02,830 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 666 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-17 18:36:02,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2024-09-17 18:36:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1874. [2024-09-17 18:36:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 943 states have (on average 1.2916224814422057) internal successors, (1218), 948 states have internal predecessors, (1218), 861 states have call successors, (861), 70 states have call predecessors, (861), 69 states have return successors, (859), 855 states have call predecessors, (859), 859 states have call successors, (859) [2024-09-17 18:36:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2938 transitions. [2024-09-17 18:36:06,237 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2938 transitions. Word has length 126 [2024-09-17 18:36:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:36:06,237 INFO L474 AbstractCegarLoop]: Abstraction has 1874 states and 2938 transitions. [2024-09-17 18:36:06,237 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-17 18:36:06,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:36:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2938 transitions. [2024-09-17 18:36:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-17 18:36:06,239 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:36:06,239 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:36:06,246 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-17 18:36:06,440 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-17 18:36:06,441 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:36:06,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:36:06,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1887231395, now seen corresponding path program 3 times [2024-09-17 18:36:06,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:36:06,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701192434] [2024-09-17 18:36:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:36:06,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:36:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:36:06,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297523919] [2024-09-17 18:36:06,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:36:06,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:36:06,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:36:06,455 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:36:06,456 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-17 18:36:06,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-17 18:36:06,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:36:06,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-17 18:36:06,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:36:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 106 proven. 65 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2024-09-17 18:36:07,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:36:19,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:36:19,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701192434] [2024-09-17 18:36:19,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:36:19,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297523919] [2024-09-17 18:36:19,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297523919] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:36:19,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:36:19,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-17 18:36:19,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107072030] [2024-09-17 18:36:19,131 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:36:19,131 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:36:19,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:36:19,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:36:19,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:36:19,132 INFO L87 Difference]: Start difference. First operand 1874 states and 2938 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-17 18:36:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:36:23,726 INFO L93 Difference]: Finished difference Result 2059 states and 3224 transitions. [2024-09-17 18:36:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 18:36:23,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 129 [2024-09-17 18:36:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:36:23,739 INFO L225 Difference]: With dead ends: 2059 [2024-09-17 18:36:23,739 INFO L226 Difference]: Without dead ends: 2057 [2024-09-17 18:36:23,740 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 18:36:23,740 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 37 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-17 18:36:23,741 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 382 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-17 18:36:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2024-09-17 18:36:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 2012. [2024-09-17 18:36:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 1013 states have (on average 1.293188548864758) internal successors, (1310), 1018 states have internal predecessors, (1310), 925 states have call successors, (925), 74 states have call predecessors, (925), 73 states have return successors, (923), 919 states have call predecessors, (923), 923 states have call successors, (923) [2024-09-17 18:36:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 3158 transitions. [2024-09-17 18:36:27,412 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 3158 transitions. Word has length 129 [2024-09-17 18:36:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:36:27,413 INFO L474 AbstractCegarLoop]: Abstraction has 2012 states and 3158 transitions. [2024-09-17 18:36:27,413 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-17 18:36:27,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:36:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 3158 transitions. [2024-09-17 18:36:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-17 18:36:27,415 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:36:27,415 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:36:27,437 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-17 18:36:27,619 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-17 18:36:27,620 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:36:27,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:36:27,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1329164778, now seen corresponding path program 7 times [2024-09-17 18:36:27,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:36:27,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098070720] [2024-09-17 18:36:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:36:27,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:36:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:36:27,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724447654] [2024-09-17 18:36:27,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:36:27,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:36:27,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:36:27,646 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:36:27,649 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-17 18:36:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:36:27,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-17 18:36:27,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:36:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 70 proven. 76 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2024-09-17 18:36:29,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:36:30,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:36:30,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098070720] [2024-09-17 18:36:30,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:36:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724447654] [2024-09-17 18:36:30,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724447654] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:36:30,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:36:30,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-17 18:36:30,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898231679] [2024-09-17 18:36:30,838 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:36:30,838 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-17 18:36:30,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:36:30,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-17 18:36:30,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:36:30,839 INFO L87 Difference]: Start difference. First operand 2012 states and 3158 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-17 18:36:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:36:36,995 INFO L93 Difference]: Finished difference Result 2146 states and 3364 transitions. [2024-09-17 18:36:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-17 18:36:36,996 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 129 [2024-09-17 18:36:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:36:37,005 INFO L225 Difference]: With dead ends: 2146 [2024-09-17 18:36:37,005 INFO L226 Difference]: Without dead ends: 2139 [2024-09-17 18:36:37,006 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 18:36:37,006 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 89 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:36:37,007 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 663 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-17 18:36:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2024-09-17 18:36:41,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2124. [2024-09-17 18:36:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 1067 states have (on average 1.295220243673852) internal successors, (1382), 1072 states have internal predecessors, (1382), 981 states have call successors, (981), 76 states have call predecessors, (981), 75 states have return successors, (979), 975 states have call predecessors, (979), 979 states have call successors, (979) [2024-09-17 18:36:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3342 transitions. [2024-09-17 18:36:41,204 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3342 transitions. Word has length 129 [2024-09-17 18:36:41,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:36:41,204 INFO L474 AbstractCegarLoop]: Abstraction has 2124 states and 3342 transitions. [2024-09-17 18:36:41,204 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-17 18:36:41,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:36:41,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3342 transitions. [2024-09-17 18:36:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-17 18:36:41,207 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:36:41,207 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:36:41,222 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-17 18:36:41,407 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:36:41,408 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:36:41,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:36:41,408 INFO L85 PathProgramCache]: Analyzing trace with hash 979073460, now seen corresponding path program 4 times [2024-09-17 18:36:41,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:36:41,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768818028] [2024-09-17 18:36:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:36:41,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:36:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:36:41,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927769116] [2024-09-17 18:36:41,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:36:41,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:36:41,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:36:41,433 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:36:41,438 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-17 18:36:41,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:36:41,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:36:41,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-17 18:36:41,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:36:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 48 proven. 125 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2024-09-17 18:36:43,267 INFO L327 TraceCheckSpWp]: Computing backward predicates...