./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.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 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 14:48:14,591 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 14:48:14,642 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 14:48:14,649 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 14:48:14,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 14:48:14,682 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 14:48:14,683 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 14:48:14,683 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 14:48:14,684 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 14:48:14,685 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 14:48:14,686 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 14:48:14,695 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 14:48:14,696 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 14:48:14,697 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 14:48:14,697 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 14:48:14,698 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 14:48:14,698 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 14:48:14,698 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 14:48:14,698 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 14:48:14,698 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 14:48:14,699 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 14:48:14,701 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 14:48:14,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 14:48:14,701 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 14:48:14,702 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 14:48:14,702 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 14:48:14,702 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 14:48:14,702 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 14:48:14,702 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 14:48:14,702 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 14:48:14,703 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 14:48:14,703 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 14:48:14,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:48:14,703 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 14:48:14,703 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 14:48:14,703 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 14:48:14,703 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 14:48:14,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 14:48:14,704 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 14:48:14,704 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 14:48:14,704 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 14:48:14,706 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 14:48:14,706 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 14:48:14,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 14:48:14,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 14:48:14,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 14:48:14,922 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 14:48:14,923 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 14:48:14,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2024-10-15 14:48:16,257 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 14:48:16,409 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 14:48:16,409 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2024-10-15 14:48:16,415 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f7de094b9/9d5c5e8d36cc412d8a27008d1f3b6a7e/FLAGba6bcad1f [2024-10-15 14:48:16,426 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f7de094b9/9d5c5e8d36cc412d8a27008d1f3b6a7e [2024-10-15 14:48:16,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 14:48:16,429 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 14:48:16,432 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 14:48:16,432 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 14:48:16,436 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 14:48:16,437 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,437 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5539534f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16, skipping insertion in model container [2024-10-15 14:48:16,438 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,453 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 14:48:16,587 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2024-10-15 14:48:16,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:48:16,619 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 14:48:16,628 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2024-10-15 14:48:16,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:48:16,649 INFO L204 MainTranslator]: Completed translation [2024-10-15 14:48:16,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16 WrapperNode [2024-10-15 14:48:16,649 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 14:48:16,650 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 14:48:16,650 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 14:48:16,651 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 14:48:16,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,661 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,666 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 14:48:16,666 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 14:48:16,682 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 14:48:16,682 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 14:48:16,682 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 14:48:16,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,713 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,746 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-15 14:48:16,746 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,746 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,749 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,751 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,752 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,753 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 14:48:16,754 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 14:48:16,754 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 14:48:16,754 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 14:48:16,755 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (1/1) ... [2024-10-15 14:48:16,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:48:16,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:16,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-15 14:48:16,783 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-15 14:48:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 14:48:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 14:48:16,811 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 14:48:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 14:48:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 14:48:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 14:48:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 14:48:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 14:48:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 14:48:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 14:48:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 14:48:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 14:48:16,870 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 14:48:16,872 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 14:48:17,003 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-10-15 14:48:17,004 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 14:48:17,019 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 14:48:17,019 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-15 14:48:17,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:48:17 BoogieIcfgContainer [2024-10-15 14:48:17,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 14:48:17,022 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 14:48:17,022 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 14:48:17,024 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 14:48:17,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:48:16" (1/3) ... [2024-10-15 14:48:17,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b713acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:48:17, skipping insertion in model container [2024-10-15 14:48:17,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:16" (2/3) ... [2024-10-15 14:48:17,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b713acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:48:17, skipping insertion in model container [2024-10-15 14:48:17,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:48:17" (3/3) ... [2024-10-15 14:48:17,026 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2024-10-15 14:48:17,038 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 14:48:17,039 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 14:48:17,077 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 14:48:17,082 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5e0a7963, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 14:48:17,082 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 14:48:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-15 14:48:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-15 14:48:17,091 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:17,092 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:17,092 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:17,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:17,096 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-10-15 14:48:17,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:17,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724213767] [2024-10-15 14:48:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:17,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,252 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,260 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:17,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:17,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724213767] [2024-10-15 14:48:17,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724213767] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:17,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:17,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-15 14:48:17,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490301623] [2024-10-15 14:48:17,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:17,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-15 14:48:17,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:17,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-15 14:48:17,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:48:17,295 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:48:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:17,326 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-10-15 14:48:17,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-15 14:48:17,328 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-10-15 14:48:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:17,333 INFO L225 Difference]: With dead ends: 70 [2024-10-15 14:48:17,334 INFO L226 Difference]: Without dead ends: 34 [2024-10-15 14:48:17,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:48:17,340 INFO L432 NwaCegarLoop]: 45 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, 45 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 [2024-10-15 14:48:17,341 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-15 14:48:17,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-15 14:48:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-15 14:48:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-10-15 14:48:17,374 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-10-15 14:48:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:17,374 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-10-15 14:48:17,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:48:17,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:17,376 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-10-15 14:48:17,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-15 14:48:17,377 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:17,378 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:17,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 14:48:17,378 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:17,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:17,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-10-15 14:48:17,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:17,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296336274] [2024-10-15 14:48:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:17,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,582 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:17,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:17,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296336274] [2024-10-15 14:48:17,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296336274] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:17,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:17,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-15 14:48:17,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805089694] [2024-10-15 14:48:17,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:17,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-15 14:48:17,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:17,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-15 14:48:17,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:17,641 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-15 14:48:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:17,751 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-10-15 14:48:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:48:17,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-10-15 14:48:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:17,753 INFO L225 Difference]: With dead ends: 53 [2024-10-15 14:48:17,754 INFO L226 Difference]: Without dead ends: 46 [2024-10-15 14:48:17,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:17,755 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:17,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:48:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-15 14:48:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-10-15 14:48:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-15 14:48:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-10-15 14:48:17,770 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-10-15 14:48:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:17,771 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-10-15 14:48:17,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-15 14:48:17,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-10-15 14:48:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 14:48:17,772 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:17,772 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:17,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-15 14:48:17,773 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:17,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:17,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-10-15 14:48:17,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:17,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686125482] [2024-10-15 14:48:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:17,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:17,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138566520] [2024-10-15 14:48:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:17,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:17,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:17,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:17,798 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 14:48:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:48:17,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:17,950 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:48:17,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:17,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686125482] [2024-10-15 14:48:17,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:17,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138566520] [2024-10-15 14:48:17,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138566520] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:17,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:17,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:17,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241008254] [2024-10-15 14:48:17,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:17,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:17,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:17,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:17,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:17,953 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-15 14:48:18,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:18,007 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-10-15 14:48:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:18,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-10-15 14:48:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:18,008 INFO L225 Difference]: With dead ends: 52 [2024-10-15 14:48:18,008 INFO L226 Difference]: Without dead ends: 50 [2024-10-15 14:48:18,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:18,011 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 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 [2024-10-15 14:48:18,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:18,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-15 14:48:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-10-15 14:48:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-15 14:48:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-10-15 14:48:18,027 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-10-15 14:48:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:18,028 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-10-15 14:48:18,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-15 14:48:18,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-10-15 14:48:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-15 14:48:18,030 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:18,030 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-15 14:48:18,045 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 14:48:18,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:18,231 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:18,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-10-15 14:48:18,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:18,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930851465] [2024-10-15 14:48:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:18,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,322 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,328 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:18,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:18,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930851465] [2024-10-15 14:48:18,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930851465] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:18,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126254729] [2024-10-15 14:48:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:18,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:18,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:18,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:18,377 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 14:48:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:48:18,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:18,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:18,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126254729] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:18,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:48:18,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-15 14:48:18,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757504484] [2024-10-15 14:48:18,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:18,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-15 14:48:18,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-15 14:48:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-15 14:48:18,517 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:48:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:18,654 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-10-15 14:48:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:48:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-10-15 14:48:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:18,656 INFO L225 Difference]: With dead ends: 102 [2024-10-15 14:48:18,656 INFO L226 Difference]: Without dead ends: 95 [2024-10-15 14:48:18,656 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-15 14:48:18,657 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:18,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:48:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-15 14:48:18,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-10-15 14:48:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-15 14:48:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-10-15 14:48:18,672 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-10-15 14:48:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:18,672 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-10-15 14:48:18,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:48:18,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-10-15 14:48:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-15 14:48:18,674 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:18,674 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-15 14:48:18,688 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-15 14:48:18,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:18,875 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:18,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:18,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-10-15 14:48:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:18,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993026723] [2024-10-15 14:48:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:18,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984212229] [2024-10-15 14:48:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:18,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:18,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:18,903 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:18,905 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 14:48:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:48:18,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:19,030 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:48:19,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:19,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993026723] [2024-10-15 14:48:19,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:19,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984212229] [2024-10-15 14:48:19,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984212229] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:19,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:19,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:19,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502100143] [2024-10-15 14:48:19,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:19,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:19,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:19,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:19,032 INFO L87 Difference]: Start difference. First operand 70 states and 94 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, (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) [2024-10-15 14:48:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:19,076 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-10-15 14:48:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:19,077 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, (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 41 [2024-10-15 14:48:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:19,078 INFO L225 Difference]: With dead ends: 78 [2024-10-15 14:48:19,078 INFO L226 Difference]: Without dead ends: 76 [2024-10-15 14:48:19,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:19,079 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:19,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-15 14:48:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-10-15 14:48:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-15 14:48:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-10-15 14:48:19,091 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-10-15 14:48:19,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:19,092 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-10-15 14:48:19,092 INFO L472 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, (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) [2024-10-15 14:48:19,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:19,092 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-10-15 14:48:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-15 14:48:19,093 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:19,093 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:19,106 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:19,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:19,294 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:19,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:19,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-10-15 14:48:19,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:19,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020596918] [2024-10-15 14:48:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:19,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:19,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489231361] [2024-10-15 14:48:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:19,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:19,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:19,309 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:19,310 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 14:48:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:19,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-15 14:48:19,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:19,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:19,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:19,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020596918] [2024-10-15 14:48:19,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:19,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489231361] [2024-10-15 14:48:19,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489231361] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:19,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:19,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-10-15 14:48:19,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727132350] [2024-10-15 14:48:19,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:19,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 14:48:19,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:19,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 14:48:19,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-10-15 14:48:19,799 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-15 14:48:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:21,067 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-10-15 14:48:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 14:48:21,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2024-10-15 14:48:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:21,069 INFO L225 Difference]: With dead ends: 132 [2024-10-15 14:48:21,069 INFO L226 Difference]: Without dead ends: 130 [2024-10-15 14:48:21,069 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-10-15 14:48:21,070 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:21,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:48:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-15 14:48:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-10-15 14:48:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-10-15 14:48:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-10-15 14:48:21,098 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-10-15 14:48:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:21,098 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-10-15 14:48:21,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-15 14:48:21,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-10-15 14:48:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 14:48:21,100 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:21,100 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2024-10-15 14:48:21,112 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 14:48:21,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:21,301 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:21,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:21,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-10-15 14:48:21,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:21,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471895887] [2024-10-15 14:48:21,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:21,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:21,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478247486] [2024-10-15 14:48:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:21,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:21,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:21,318 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:21,322 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 14:48:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:21,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:48:21,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 14:48:21,395 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:48:21,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:21,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471895887] [2024-10-15 14:48:21,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:21,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478247486] [2024-10-15 14:48:21,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478247486] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:21,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:21,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:21,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078666034] [2024-10-15 14:48:21,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:21,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:21,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:21,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:21,401 INFO L87 Difference]: Start difference. First operand 109 states and 146 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) [2024-10-15 14:48:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:21,464 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-10-15 14:48:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:21,465 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 46 [2024-10-15 14:48:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:21,466 INFO L225 Difference]: With dead ends: 155 [2024-10-15 14:48:21,466 INFO L226 Difference]: Without dead ends: 153 [2024-10-15 14:48:21,467 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:21,467 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 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 [2024-10-15 14:48:21,467 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-10-15 14:48:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-10-15 14:48:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 93 states have internal predecessors, (118), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-10-15 14:48:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-10-15 14:48:21,517 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-10-15 14:48:21,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:21,517 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-10-15 14:48:21,517 INFO L472 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) [2024-10-15 14:48:21,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:21,517 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-10-15 14:48:21,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 14:48:21,518 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:21,518 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-15 14:48:21,538 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:21,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-15 14:48:21,719 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:21,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-10-15 14:48:21,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:21,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018975495] [2024-10-15 14:48:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:21,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:21,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303815600] [2024-10-15 14:48:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:21,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:21,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:21,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:21,737 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 14:48:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:21,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-15 14:48:21,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:21,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:21,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:21,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018975495] [2024-10-15 14:48:21,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:21,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303815600] [2024-10-15 14:48:21,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303815600] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:21,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:48:21,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-10-15 14:48:21,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871911991] [2024-10-15 14:48:21,953 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:21,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 14:48:21,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 14:48:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:48:21,957 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2024-10-15 14:48:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:22,089 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-10-15 14:48:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 14:48:22,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 46 [2024-10-15 14:48:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:22,091 INFO L225 Difference]: With dead ends: 174 [2024-10-15 14:48:22,091 INFO L226 Difference]: Without dead ends: 172 [2024-10-15 14:48:22,091 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:48:22,092 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 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 [2024-10-15 14:48:22,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:48:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-10-15 14:48:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-10-15 14:48:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.276190476190476) internal successors, (134), 106 states have internal predecessors, (134), 55 states have call successors, (55), 10 states have call predecessors, (55), 9 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-10-15 14:48:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-10-15 14:48:22,131 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-10-15 14:48:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:22,131 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-10-15 14:48:22,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2024-10-15 14:48:22,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:22,132 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-10-15 14:48:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-15 14:48:22,133 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:22,134 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:22,146 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:22,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:22,338 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:22,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:22,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-10-15 14:48:22,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:22,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165894034] [2024-10-15 14:48:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:22,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:22,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523278990] [2024-10-15 14:48:22,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:22,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:22,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:22,348 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:22,351 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 14:48:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:22,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:48:22,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:48:22,409 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:48:22,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:22,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165894034] [2024-10-15 14:48:22,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:22,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523278990] [2024-10-15 14:48:22,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523278990] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:22,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:22,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:22,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695836993] [2024-10-15 14:48:22,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:22,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:22,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:22,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:22,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:22,411 INFO L87 Difference]: Start difference. First operand 170 states and 242 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-15 14:48:22,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:22,505 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-10-15 14:48:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:22,505 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-10-15 14:48:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:22,507 INFO L225 Difference]: With dead ends: 254 [2024-10-15 14:48:22,507 INFO L226 Difference]: Without dead ends: 252 [2024-10-15 14:48:22,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:22,508 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 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 [2024-10-15 14:48:22,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-10-15 14:48:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-10-15 14:48:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 133 states have internal predecessors, (149), 103 states have call successors, (103), 11 states have call predecessors, (103), 10 states have return successors, (101), 89 states have call predecessors, (101), 101 states have call successors, (101) [2024-10-15 14:48:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-10-15 14:48:22,559 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-10-15 14:48:22,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:22,560 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-10-15 14:48:22,560 INFO L472 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-15 14:48:22,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:22,560 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-10-15 14:48:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-15 14:48:22,561 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:22,561 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:22,574 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 14:48:22,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:22,766 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:22,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:22,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-10-15 14:48:22,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:22,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444790788] [2024-10-15 14:48:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:22,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:22,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:22,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:22,816 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:22,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:22,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:22,819 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-15 14:48:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:22,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:22,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444790788] [2024-10-15 14:48:22,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444790788] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:22,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:22,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:22,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835426447] [2024-10-15 14:48:22,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:22,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:22,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:22,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:22,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:22,823 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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) [2024-10-15 14:48:22,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:22,924 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-10-15 14:48:22,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:48:22,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 51 [2024-10-15 14:48:22,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:22,926 INFO L225 Difference]: With dead ends: 291 [2024-10-15 14:48:22,926 INFO L226 Difference]: Without dead ends: 177 [2024-10-15 14:48:22,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:48:22,928 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 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 [2024-10-15 14:48:22,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-10-15 14:48:22,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-10-15 14:48:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-10-15 14:48:22,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-10-15 14:48:22,961 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-10-15 14:48:22,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:22,962 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-10-15 14:48:22,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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) [2024-10-15 14:48:22,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:22,962 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-10-15 14:48:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-15 14:48:22,963 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:22,963 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2024-10-15 14:48:22,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-15 14:48:22,963 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:22,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:22,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-10-15 14:48:22,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:22,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334683716] [2024-10-15 14:48:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:22,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:22,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784902391] [2024-10-15 14:48:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:22,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:22,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:22,977 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:22,978 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 14:48:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 14:48:23,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-15 14:48:23,561 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-15 14:48:25,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:25,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334683716] [2024-10-15 14:48:25,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:25,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784902391] [2024-10-15 14:48:25,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784902391] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:25,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:25,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-15 14:48:25,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001970019] [2024-10-15 14:48:25,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:25,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 14:48:25,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:25,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 14:48:25,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-10-15 14:48:25,015 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-10-15 14:48:28,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:28,916 INFO L93 Difference]: Finished difference Result 393 states and 601 transitions. [2024-10-15 14:48:28,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-15 14:48:28,917 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 63 [2024-10-15 14:48:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:28,920 INFO L225 Difference]: With dead ends: 393 [2024-10-15 14:48:28,920 INFO L226 Difference]: Without dead ends: 385 [2024-10-15 14:48:28,921 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-10-15 14:48:28,921 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 257 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:28,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 660 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-10-15 14:48:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-10-15 14:48:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2024-10-15 14:48:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 131 states have (on average 1.2213740458015268) internal successors, (160), 138 states have internal predecessors, (160), 91 states have call successors, (91), 12 states have call predecessors, (91), 11 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2024-10-15 14:48:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2024-10-15 14:48:29,021 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 63 [2024-10-15 14:48:29,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:29,022 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2024-10-15 14:48:29,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-10-15 14:48:29,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2024-10-15 14:48:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-15 14:48:29,023 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:29,023 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:29,035 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-15 14:48:29,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:29,228 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:29,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:29,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-10-15 14:48:29,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:29,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806043256] [2024-10-15 14:48:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:29,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,278 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,280 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,289 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-15 14:48:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-15 14:48:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,293 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-15 14:48:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,295 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-15 14:48:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,296 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-10-15 14:48:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,298 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-15 14:48:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-15 14:48:29,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:29,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806043256] [2024-10-15 14:48:29,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806043256] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:29,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:29,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:29,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903691976] [2024-10-15 14:48:29,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:29,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:29,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:29,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:29,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:29,301 INFO L87 Difference]: Start difference. First operand 234 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 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) [2024-10-15 14:48:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:29,451 INFO L93 Difference]: Finished difference Result 399 states and 580 transitions. [2024-10-15 14:48:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:29,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 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 71 [2024-10-15 14:48:29,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:29,453 INFO L225 Difference]: With dead ends: 399 [2024-10-15 14:48:29,453 INFO L226 Difference]: Without dead ends: 243 [2024-10-15 14:48:29,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:29,454 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 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 [2024-10-15 14:48:29,458 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-10-15 14:48:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2024-10-15 14:48:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 130 states have internal predecessors, (158), 87 states have call successors, (87), 12 states have call predecessors, (87), 11 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-10-15 14:48:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-10-15 14:48:29,583 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-10-15 14:48:29,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:29,584 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-10-15 14:48:29,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 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) [2024-10-15 14:48:29,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:29,584 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-10-15 14:48:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-15 14:48:29,585 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:29,585 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:29,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-15 14:48:29,585 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:29,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:29,585 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-10-15 14:48:29,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:29,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666872793] [2024-10-15 14:48:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:29,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:29,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440357106] [2024-10-15 14:48:29,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:29,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:29,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:29,597 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) [2024-10-15 14:48:29,598 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 14:48:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:29,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-15 14:48:29,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-10-15 14:48:29,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-10-15 14:48:29,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:29,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666872793] [2024-10-15 14:48:29,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:29,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440357106] [2024-10-15 14:48:29,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440357106] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:29,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:48:29,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-15 14:48:29,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872138966] [2024-10-15 14:48:29,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:29,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:29,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:29,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:48:29,789 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-15 14:48:29,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:29,911 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-10-15 14:48:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:29,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2024-10-15 14:48:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:29,913 INFO L225 Difference]: With dead ends: 234 [2024-10-15 14:48:29,913 INFO L226 Difference]: Without dead ends: 232 [2024-10-15 14:48:29,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:48:29,914 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 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 [2024-10-15 14:48:29,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:29,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-10-15 14:48:29,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-10-15 14:48:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 133 states have internal predecessors, (161), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-10-15 14:48:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-10-15 14:48:29,998 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-10-15 14:48:29,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:29,999 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-10-15 14:48:29,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-15 14:48:29,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:29,999 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-10-15 14:48:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-15 14:48:30,002 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:30,002 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:30,017 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-15 14:48:30,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-15 14:48:30,207 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:30,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:30,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-10-15 14:48:30,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:30,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495608955] [2024-10-15 14:48:30,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:30,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:30,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048679868] [2024-10-15 14:48:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:30,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:30,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:30,228 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) [2024-10-15 14:48:30,230 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 14:48:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:30,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-15 14:48:30,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-15 14:48:30,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-15 14:48:31,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:31,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495608955] [2024-10-15 14:48:31,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:31,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048679868] [2024-10-15 14:48:31,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048679868] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:31,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:31,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-15 14:48:31,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147641914] [2024-10-15 14:48:31,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:31,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 14:48:31,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:31,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 14:48:31,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-10-15 14:48:31,530 INFO L87 Difference]: Start difference. First operand 232 states and 333 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:48:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:36,899 INFO L93 Difference]: Finished difference Result 350 states and 504 transitions. [2024-10-15 14:48:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-15 14:48:36,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 71 [2024-10-15 14:48:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:36,902 INFO L225 Difference]: With dead ends: 350 [2024-10-15 14:48:36,902 INFO L226 Difference]: Without dead ends: 348 [2024-10-15 14:48:36,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:48:36,903 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 162 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:36,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 444 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-10-15 14:48:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-10-15 14:48:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 325. [2024-10-15 14:48:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 188 states have internal predecessors, (230), 123 states have call successors, (123), 15 states have call predecessors, (123), 14 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2024-10-15 14:48:37,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 474 transitions. [2024-10-15 14:48:37,060 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 474 transitions. Word has length 71 [2024-10-15 14:48:37,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:37,061 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 474 transitions. [2024-10-15 14:48:37,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:48:37,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:37,061 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 474 transitions. [2024-10-15 14:48:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-15 14:48:37,062 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:37,062 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1] [2024-10-15 14:48:37,074 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:37,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-15 14:48:37,263 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:37,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-10-15 14:48:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:37,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461856910] [2024-10-15 14:48:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:37,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:37,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894794229] [2024-10-15 14:48:37,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:48:37,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:37,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:37,277 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) [2024-10-15 14:48:37,278 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 14:48:37,344 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:48:37,345 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:37,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-15 14:48:37,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-15 14:48:37,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-15 14:48:37,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:37,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461856910] [2024-10-15 14:48:37,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:37,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894794229] [2024-10-15 14:48:37,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894794229] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:37,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:37,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-10-15 14:48:37,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092156411] [2024-10-15 14:48:37,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:37,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 14:48:37,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:37,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 14:48:37,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:48:37,595 INFO L87 Difference]: Start difference. First operand 325 states and 474 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 14:48:38,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:38,255 INFO L93 Difference]: Finished difference Result 426 states and 616 transitions. [2024-10-15 14:48:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:48:38,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2024-10-15 14:48:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:38,258 INFO L225 Difference]: With dead ends: 426 [2024-10-15 14:48:38,258 INFO L226 Difference]: Without dead ends: 424 [2024-10-15 14:48:38,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-10-15 14:48:38,259 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:38,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 295 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:48:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-10-15 14:48:38,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 403. [2024-10-15 14:48:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 231 states have (on average 1.2337662337662338) internal successors, (285), 232 states have internal predecessors, (285), 155 states have call successors, (155), 17 states have call predecessors, (155), 16 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2024-10-15 14:48:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 593 transitions. [2024-10-15 14:48:38,474 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 593 transitions. Word has length 71 [2024-10-15 14:48:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:38,475 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 593 transitions. [2024-10-15 14:48:38,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 14:48:38,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 593 transitions. [2024-10-15 14:48:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-10-15 14:48:38,476 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:38,476 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:38,484 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-15 14:48:38,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-15 14:48:38,681 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:38,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:38,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-10-15 14:48:38,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:38,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147130141] [2024-10-15 14:48:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:38,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:38,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744677349] [2024-10-15 14:48:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:38,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:38,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:38,715 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) [2024-10-15 14:48:38,716 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 14:48:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:38,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-15 14:48:38,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-10-15 14:48:39,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-10-15 14:48:41,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:41,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147130141] [2024-10-15 14:48:41,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:41,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744677349] [2024-10-15 14:48:41,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744677349] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:41,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:41,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-10-15 14:48:41,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098715102] [2024-10-15 14:48:41,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:41,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 14:48:41,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:41,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 14:48:41,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:48:41,489 INFO L87 Difference]: Start difference. First operand 403 states and 593 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-10-15 14:48:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:47,892 INFO L93 Difference]: Finished difference Result 544 states and 801 transitions. [2024-10-15 14:48:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-15 14:48:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 85 [2024-10-15 14:48:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:47,896 INFO L225 Difference]: With dead ends: 544 [2024-10-15 14:48:47,896 INFO L226 Difference]: Without dead ends: 540 [2024-10-15 14:48:47,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-10-15 14:48:47,897 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 204 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:47,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 683 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-10-15 14:48:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-10-15 14:48:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 526. [2024-10-15 14:48:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 302 states have (on average 1.2384105960264902) internal successors, (374), 303 states have internal predecessors, (374), 203 states have call successors, (203), 21 states have call predecessors, (203), 20 states have return successors, (201), 201 states have call predecessors, (201), 201 states have call successors, (201) [2024-10-15 14:48:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 778 transitions. [2024-10-15 14:48:48,215 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 778 transitions. Word has length 85 [2024-10-15 14:48:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:48,215 INFO L471 AbstractCegarLoop]: Abstraction has 526 states and 778 transitions. [2024-10-15 14:48:48,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-10-15 14:48:48,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:48,215 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 778 transitions. [2024-10-15 14:48:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-10-15 14:48:48,216 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:48,217 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 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, 1, 1] [2024-10-15 14:48:48,229 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-15 14:48:48,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-15 14:48:48,417 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:48,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:48,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-10-15 14:48:48,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:48,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830452853] [2024-10-15 14:48:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:48,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:48,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343556795] [2024-10-15 14:48:48,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:48,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:48,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:48,435 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) [2024-10-15 14:48:48,436 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-15 14:48:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:48,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-15 14:48:48,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-10-15 14:48:48,693 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-10-15 14:48:49,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:49,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830452853] [2024-10-15 14:48:49,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:49,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343556795] [2024-10-15 14:48:49,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343556795] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:49,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:49,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-15 14:48:49,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201245753] [2024-10-15 14:48:49,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:49,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:48:49,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:49,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:48:49,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:48:49,067 INFO L87 Difference]: Start difference. First operand 526 states and 778 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-10-15 14:48:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:51,165 INFO L93 Difference]: Finished difference Result 1227 states and 1964 transitions. [2024-10-15 14:48:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 14:48:51,166 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 98 [2024-10-15 14:48:51,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:51,176 INFO L225 Difference]: With dead ends: 1227 [2024-10-15 14:48:51,176 INFO L226 Difference]: Without dead ends: 1225 [2024-10-15 14:48:51,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:48:51,177 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 141 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:51,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 400 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:48:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2024-10-15 14:48:52,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1156. [2024-10-15 14:48:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 553 states have (on average 1.332730560578662) internal successors, (737), 554 states have internal predecessors, (737), 579 states have call successors, (579), 24 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-10-15 14:48:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1893 transitions. [2024-10-15 14:48:52,092 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1893 transitions. Word has length 98 [2024-10-15 14:48:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:52,092 INFO L471 AbstractCegarLoop]: Abstraction has 1156 states and 1893 transitions. [2024-10-15 14:48:52,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-10-15 14:48:52,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1893 transitions. [2024-10-15 14:48:52,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-15 14:48:52,094 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:52,094 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 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] [2024-10-15 14:48:52,108 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:52,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-15 14:48:52,297 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:52,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1927942246, now seen corresponding path program 3 times [2024-10-15 14:48:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:52,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273646177] [2024-10-15 14:48:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:52,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:52,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175862991] [2024-10-15 14:48:52,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:48:52,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:52,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:52,316 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) [2024-10-15 14:48:52,317 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-15 14:48:52,385 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:48:52,385 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:52,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-15 14:48:52,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-10-15 14:48:52,693 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-10-15 14:48:53,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:53,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273646177] [2024-10-15 14:48:53,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:53,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175862991] [2024-10-15 14:48:53,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175862991] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:53,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:53,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-10-15 14:48:53,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068088496] [2024-10-15 14:48:53,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:53,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 14:48:53,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:53,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 14:48:53,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-10-15 14:48:53,082 INFO L87 Difference]: Start difference. First operand 1156 states and 1893 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-10-15 14:48:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:55,693 INFO L93 Difference]: Finished difference Result 1373 states and 2256 transitions. [2024-10-15 14:48:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-15 14:48:55,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 96 [2024-10-15 14:48:55,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:55,701 INFO L225 Difference]: With dead ends: 1373 [2024-10-15 14:48:55,701 INFO L226 Difference]: Without dead ends: 1369 [2024-10-15 14:48:55,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:48:55,703 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 81 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:55,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 392 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-15 14:48:55,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2024-10-15 14:48:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1158. [2024-10-15 14:48:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 555 states have (on average 1.3297297297297297) internal successors, (738), 555 states have internal predecessors, (738), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-10-15 14:48:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1894 transitions. [2024-10-15 14:48:56,860 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1894 transitions. Word has length 96 [2024-10-15 14:48:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:56,861 INFO L471 AbstractCegarLoop]: Abstraction has 1158 states and 1894 transitions. [2024-10-15 14:48:56,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-10-15 14:48:56,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1894 transitions. [2024-10-15 14:48:56,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-10-15 14:48:56,863 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:56,863 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:56,872 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-15 14:48:57,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-15 14:48:57,064 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:57,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:57,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1336069028, now seen corresponding path program 2 times [2024-10-15 14:48:57,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:57,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605679193] [2024-10-15 14:48:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:57,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,227 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,229 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-15 14:48:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-15 14:48:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,241 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-15 14:48:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-15 14:48:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,247 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-15 14:48:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,249 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-10-15 14:48:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-15 14:48:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-15 14:48:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-15 14:48:57,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605679193] [2024-10-15 14:48:57,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605679193] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906386841] [2024-10-15 14:48:57,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:48:57,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:57,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:57,262 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) [2024-10-15 14:48:57,266 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-15 14:48:57,337 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:48:57,337 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:57,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-15 14:48:57,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-15 14:48:57,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-15 14:48:57,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906386841] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:57,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:48:57,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-10-15 14:48:57,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117475025] [2024-10-15 14:48:57,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:57,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 14:48:57,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:57,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 14:48:57,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:48:57,483 INFO L87 Difference]: Start difference. First operand 1158 states and 1894 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 14:48:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:59,020 INFO L93 Difference]: Finished difference Result 1291 states and 2100 transitions. [2024-10-15 14:48:59,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-15 14:48:59,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 98 [2024-10-15 14:48:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:59,027 INFO L225 Difference]: With dead ends: 1291 [2024-10-15 14:48:59,027 INFO L226 Difference]: Without dead ends: 1286 [2024-10-15 14:48:59,028 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:48:59,028 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 66 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:59,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 457 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:48:59,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-10-15 14:49:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1152. [2024-10-15 14:49:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 549 states have (on average 1.331511839708561) internal successors, (731), 549 states have internal predecessors, (731), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-10-15 14:49:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1887 transitions. [2024-10-15 14:49:00,069 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1887 transitions. Word has length 98 [2024-10-15 14:49:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:49:00,070 INFO L471 AbstractCegarLoop]: Abstraction has 1152 states and 1887 transitions. [2024-10-15 14:49:00,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 14:49:00,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1887 transitions. [2024-10-15 14:49:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-10-15 14:49:00,071 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:49:00,071 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-10-15 14:49:00,081 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-15 14:49:00,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:00,272 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:49:00,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:00,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 2 times [2024-10-15 14:49:00,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:49:00,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49607621] [2024-10-15 14:49:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:49:00,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:49:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:49:00,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301637350] [2024-10-15 14:49:00,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:49:00,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:00,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:49:00,293 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) [2024-10-15 14:49:00,302 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-15 14:49:00,393 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:49:00,393 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:49:00,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-10-15 14:49:00,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:49:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 50 proven. 38 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-10-15 14:49:01,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:49:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 50 proven. 38 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-10-15 14:49:04,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:49:04,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49607621] [2024-10-15 14:49:04,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:49:04,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301637350] [2024-10-15 14:49:04,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301637350] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:49:04,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:49:04,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2024-10-15 14:49:04,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554620669] [2024-10-15 14:49:04,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:49:04,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-15 14:49:04,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:49:04,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-15 14:49:04,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:49:04,504 INFO L87 Difference]: Start difference. First operand 1152 states and 1887 transitions. Second operand has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-10-15 14:49:08,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-15 14:49:22,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:49:22,240 INFO L93 Difference]: Finished difference Result 1442 states and 2319 transitions. [2024-10-15 14:49:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-10-15 14:49:22,241 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 112 [2024-10-15 14:49:22,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:49:22,247 INFO L225 Difference]: With dead ends: 1442 [2024-10-15 14:49:22,247 INFO L226 Difference]: Without dead ends: 1436 [2024-10-15 14:49:22,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1349, Invalid=5293, Unknown=0, NotChecked=0, Total=6642 [2024-10-15 14:49:22,252 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 230 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:49:22,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1175 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-10-15 14:49:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2024-10-15 14:49:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1164. [2024-10-15 14:49:23,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 575 states have (on average 1.3165217391304347) internal successors, (757), 575 states have internal predecessors, (757), 559 states have call successors, (559), 31 states have call predecessors, (559), 29 states have return successors, (557), 557 states have call predecessors, (557), 557 states have call successors, (557) [2024-10-15 14:49:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1873 transitions. [2024-10-15 14:49:23,901 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1873 transitions. Word has length 112 [2024-10-15 14:49:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:49:23,902 INFO L471 AbstractCegarLoop]: Abstraction has 1164 states and 1873 transitions. [2024-10-15 14:49:23,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-10-15 14:49:23,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1873 transitions. [2024-10-15 14:49:23,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-10-15 14:49:23,903 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:49:23,904 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:49:23,913 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-15 14:49:24,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:24,108 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:49:24,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:24,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2105883196, now seen corresponding path program 3 times [2024-10-15 14:49:24,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:49:24,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648989844] [2024-10-15 14:49:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:49:24,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:49:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:49:24,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450341899] [2024-10-15 14:49:24,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:49:24,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:24,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:49:24,127 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) [2024-10-15 14:49:24,127 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-15 14:49:24,208 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-15 14:49:24,208 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:49:24,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-10-15 14:49:24,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:49:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-10-15 14:49:24,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:49:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-10-15 14:49:28,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:49:28,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648989844] [2024-10-15 14:49:28,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:49:28,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450341899] [2024-10-15 14:49:28,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450341899] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:49:28,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:49:28,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2024-10-15 14:49:28,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757701281] [2024-10-15 14:49:28,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:49:28,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-15 14:49:28,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:49:28,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-15 14:49:28,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:49:28,245 INFO L87 Difference]: Start difference. First operand 1164 states and 1873 transitions. Second operand has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-10-15 14:49:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:49:45,719 INFO L93 Difference]: Finished difference Result 1591 states and 2542 transitions. [2024-10-15 14:49:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-10-15 14:49:45,719 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 115 [2024-10-15 14:49:45,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:49:45,730 INFO L225 Difference]: With dead ends: 1591 [2024-10-15 14:49:45,734 INFO L226 Difference]: Without dead ends: 1585 [2024-10-15 14:49:45,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3555 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=2066, Invalid=9490, Unknown=0, NotChecked=0, Total=11556 [2024-10-15 14:49:45,740 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 394 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:49:45,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 935 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-10-15 14:49:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2024-10-15 14:49:47,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1348. [2024-10-15 14:49:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 671 states have (on average 1.3129657228017884) internal successors, (881), 671 states have internal predecessors, (881), 643 states have call successors, (643), 35 states have call predecessors, (643), 33 states have return successors, (641), 641 states have call predecessors, (641), 641 states have call successors, (641) [2024-10-15 14:49:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2165 transitions. [2024-10-15 14:49:47,969 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2165 transitions. Word has length 115 [2024-10-15 14:49:47,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:49:47,969 INFO L471 AbstractCegarLoop]: Abstraction has 1348 states and 2165 transitions. [2024-10-15 14:49:47,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-10-15 14:49:47,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2165 transitions. [2024-10-15 14:49:47,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-10-15 14:49:47,971 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:49:47,971 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:49:47,979 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-15 14:49:48,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:48,175 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:49:48,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:48,175 INFO L85 PathProgramCache]: Analyzing trace with hash 402888186, now seen corresponding path program 4 times [2024-10-15 14:49:48,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:49:48,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581200343] [2024-10-15 14:49:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:49:48,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:49:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:49:48,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434630132] [2024-10-15 14:49:48,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:49:48,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:48,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:49:48,214 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) [2024-10-15 14:49:48,216 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-15 14:49:48,275 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:49:48,275 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:49:48,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-15 14:49:48,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:49:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-10-15 14:49:49,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:49:50,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:49:50,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581200343] [2024-10-15 14:49:50,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:49:50,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434630132] [2024-10-15 14:49:50,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434630132] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:49:50,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:49:50,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-10-15 14:49:50,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928614792] [2024-10-15 14:49:50,484 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:49:50,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 14:49:50,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:49:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 14:49:50,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:49:50,485 INFO L87 Difference]: Start difference. First operand 1348 states and 2165 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:49:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:49:53,768 INFO L93 Difference]: Finished difference Result 1493 states and 2379 transitions. [2024-10-15 14:49:53,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 14:49:53,769 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 115 [2024-10-15 14:49:53,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:49:53,776 INFO L225 Difference]: With dead ends: 1493 [2024-10-15 14:49:53,776 INFO L226 Difference]: Without dead ends: 1488 [2024-10-15 14:49:53,776 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2024-10-15 14:49:53,777 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 87 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:49:53,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 462 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:49:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2024-10-15 14:49:56,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1462. [2024-10-15 14:49:56,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 725 states have (on average 1.3131034482758621) internal successors, (952), 725 states have internal predecessors, (952), 699 states have call successors, (699), 39 states have call predecessors, (699), 37 states have return successors, (697), 697 states have call predecessors, (697), 697 states have call successors, (697) [2024-10-15 14:49:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2348 transitions. [2024-10-15 14:49:56,120 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2348 transitions. Word has length 115 [2024-10-15 14:49:56,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:49:56,120 INFO L471 AbstractCegarLoop]: Abstraction has 1462 states and 2348 transitions. [2024-10-15 14:49:56,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:49:56,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2348 transitions. [2024-10-15 14:49:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-10-15 14:49:56,122 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:49:56,122 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:49:56,135 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-15 14:49:56,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-15 14:49:56,326 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:49:56,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:56,327 INFO L85 PathProgramCache]: Analyzing trace with hash 488840605, now seen corresponding path program 5 times [2024-10-15 14:49:56,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:49:56,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227558517] [2024-10-15 14:49:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:49:56,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:49:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:49:56,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075356796] [2024-10-15 14:49:56,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:49:56,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:56,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:49:56,362 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) [2024-10-15 14:49:56,364 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-15 14:49:56,461 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-15 14:49:56,462 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:49:56,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-10-15 14:49:56,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:49:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 43 proven. 95 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-10-15 14:49:57,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:50:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 43 proven. 95 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-10-15 14:50:02,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:50:02,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227558517] [2024-10-15 14:50:02,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:50:02,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075356796] [2024-10-15 14:50:02,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075356796] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:50:02,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:50:02,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2024-10-15 14:50:02,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505107844] [2024-10-15 14:50:02,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:50:02,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-15 14:50:02,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:50:02,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-15 14:50:02,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:50:02,745 INFO L87 Difference]: Start difference. First operand 1462 states and 2348 transitions. Second operand has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-10-15 14:50:38,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:50:38,491 INFO L93 Difference]: Finished difference Result 2356 states and 3786 transitions. [2024-10-15 14:50:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-10-15 14:50:38,492 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) Word has length 120 [2024-10-15 14:50:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:50:38,502 INFO L225 Difference]: With dead ends: 2356 [2024-10-15 14:50:38,502 INFO L226 Difference]: Without dead ends: 2350 [2024-10-15 14:50:38,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5525 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=3568, Invalid=14792, Unknown=0, NotChecked=0, Total=18360 [2024-10-15 14:50:38,507 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 518 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 2480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:50:38,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1360 Invalid, 2480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 1900 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2024-10-15 14:50:38,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2024-10-15 14:50:42,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1808. [2024-10-15 14:50:42,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 916 states have (on average 1.3013100436681222) internal successors, (1192), 916 states have internal predecessors, (1192), 847 states have call successors, (847), 46 states have call predecessors, (847), 44 states have return successors, (845), 845 states have call predecessors, (845), 845 states have call successors, (845) [2024-10-15 14:50:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 2884 transitions. [2024-10-15 14:50:42,303 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 2884 transitions. Word has length 120 [2024-10-15 14:50:42,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:50:42,303 INFO L471 AbstractCegarLoop]: Abstraction has 1808 states and 2884 transitions. [2024-10-15 14:50:42,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-10-15 14:50:42,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:42,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 2884 transitions. [2024-10-15 14:50:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-10-15 14:50:42,306 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:50:42,306 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-10-15 14:50:42,318 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-15 14:50:42,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-15 14:50:42,506 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:50:42,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:42,507 INFO L85 PathProgramCache]: Analyzing trace with hash 43466790, now seen corresponding path program 6 times [2024-10-15 14:50:42,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:50:42,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252748980] [2024-10-15 14:50:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:50:42,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:50:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:50:42,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470216383] [2024-10-15 14:50:42,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:50:42,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:50:42,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:50:42,523 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) [2024-10-15 14:50:42,524 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-15 14:50:42,590 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-15 14:50:42,591 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:50:42,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-15 14:50:42,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:50:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-10-15 14:50:43,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:50:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-10-15 14:50:46,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:50:46,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252748980] [2024-10-15 14:50:46,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:50:46,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470216383] [2024-10-15 14:50:46,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470216383] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:50:46,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:50:46,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-10-15 14:50:46,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542386417] [2024-10-15 14:50:46,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:50:46,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 14:50:46,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:50:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 14:50:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-10-15 14:50:46,020 INFO L87 Difference]: Start difference. First operand 1808 states and 2884 transitions. Second operand has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2024-10-15 14:51:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:51:02,648 INFO L93 Difference]: Finished difference Result 2210 states and 3523 transitions. [2024-10-15 14:51:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-10-15 14:51:02,650 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 132 [2024-10-15 14:51:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:51:02,659 INFO L225 Difference]: With dead ends: 2210 [2024-10-15 14:51:02,659 INFO L226 Difference]: Without dead ends: 2204 [2024-10-15 14:51:02,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1277, Invalid=5695, Unknown=0, NotChecked=0, Total=6972 [2024-10-15 14:51:02,662 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 222 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:51:02,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 799 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-10-15 14:51:02,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2024-10-15 14:51:06,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2019. [2024-10-15 14:51:06,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1016 states have (on average 1.3061023622047243) internal successors, (1327), 1016 states have internal predecessors, (1327), 955 states have call successors, (955), 49 states have call predecessors, (955), 47 states have return successors, (953), 953 states have call predecessors, (953), 953 states have call successors, (953) [2024-10-15 14:51:06,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3235 transitions. [2024-10-15 14:51:06,802 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3235 transitions. Word has length 132 [2024-10-15 14:51:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:51:06,803 INFO L471 AbstractCegarLoop]: Abstraction has 2019 states and 3235 transitions. [2024-10-15 14:51:06,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2024-10-15 14:51:06,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:06,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3235 transitions. [2024-10-15 14:51:06,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-10-15 14:51:06,807 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:51:06,807 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:51:06,834 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-15 14:51:07,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-15 14:51:07,008 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:51:07,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:07,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1666271485, now seen corresponding path program 7 times [2024-10-15 14:51:07,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:51:07,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736037459] [2024-10-15 14:51:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:51:07,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:51:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:51:07,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152206022] [2024-10-15 14:51:07,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:51:07,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:51:07,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:51:07,043 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) [2024-10-15 14:51:07,044 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-15 14:51:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:07,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-15 14:51:07,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:51:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 76 proven. 76 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-10-15 14:51:08,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:51:09,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:51:09,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736037459] [2024-10-15 14:51:09,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:51:09,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152206022] [2024-10-15 14:51:09,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152206022] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:51:09,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:51:09,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-10-15 14:51:09,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300859367] [2024-10-15 14:51:09,463 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:51:09,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 14:51:09,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:51:09,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 14:51:09,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:51:09,464 INFO L87 Difference]: Start difference. First operand 2019 states and 3235 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2024-10-15 14:51:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:51:15,030 INFO L93 Difference]: Finished difference Result 2165 states and 3451 transitions. [2024-10-15 14:51:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 14:51:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 140 [2024-10-15 14:51:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:51:15,040 INFO L225 Difference]: With dead ends: 2165 [2024-10-15 14:51:15,040 INFO L226 Difference]: Without dead ends: 2160 [2024-10-15 14:51:15,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:51:15,041 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 93 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:51:15,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 644 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:51:15,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2024-10-15 14:51:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 2030. [2024-10-15 14:51:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 1025 states have (on average 1.3034146341463415) internal successors, (1336), 1025 states have internal predecessors, (1336), 955 states have call successors, (955), 51 states have call predecessors, (955), 49 states have return successors, (953), 953 states have call predecessors, (953), 953 states have call successors, (953) [2024-10-15 14:51:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 3244 transitions. [2024-10-15 14:51:19,297 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 3244 transitions. Word has length 140 [2024-10-15 14:51:19,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:51:19,297 INFO L471 AbstractCegarLoop]: Abstraction has 2030 states and 3244 transitions. [2024-10-15 14:51:19,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2024-10-15 14:51:19,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:19,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 3244 transitions. [2024-10-15 14:51:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-10-15 14:51:19,301 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:51:19,301 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:51:19,317 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-15 14:51:19,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-15 14:51:19,506 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:51:19,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:19,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1290054545, now seen corresponding path program 8 times [2024-10-15 14:51:19,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:51:19,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829566647] [2024-10-15 14:51:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:51:19,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:51:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:51:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,611 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:51:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,612 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:51:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:51:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:51:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,615 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-15 14:51:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-15 14:51:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-15 14:51:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,623 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-15 14:51:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-15 14:51:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-15 14:51:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,629 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-15 14:51:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-15 14:51:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-10-15 14:51:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,639 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-10-15 14:51:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-10-15 14:51:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-10-15 14:51:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-10-15 14:51:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,649 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-10-15 14:51:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,651 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-10-15 14:51:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-10-15 14:51:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-10-15 14:51:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,659 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-10-15 14:51:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,660 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-10-15 14:51:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-10-15 14:51:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 90 proven. 18 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2024-10-15 14:51:19,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:51:19,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829566647] [2024-10-15 14:51:19,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829566647] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:51:19,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523170859] [2024-10-15 14:51:19,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:51:19,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:51:19,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:51:19,667 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) [2024-10-15 14:51:19,672 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-15 14:51:19,760 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:51:19,760 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:51:19,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-15 14:51:19,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:51:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 458 proven. 18 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-10-15 14:51:19,807 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:51:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 90 proven. 18 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2024-10-15 14:51:19,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523170859] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:51:19,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:51:19,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-10-15 14:51:19,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377779094] [2024-10-15 14:51:19,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:51:19,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 14:51:19,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:51:19,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 14:51:19,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:51:19,908 INFO L87 Difference]: Start difference. First operand 2030 states and 3244 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-10-15 14:51:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:51:24,963 INFO L93 Difference]: Finished difference Result 3341 states and 5342 transitions. [2024-10-15 14:51:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:51:24,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 157 [2024-10-15 14:51:24,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:51:24,977 INFO L225 Difference]: With dead ends: 3341 [2024-10-15 14:51:24,977 INFO L226 Difference]: Without dead ends: 2298 [2024-10-15 14:51:24,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 359 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:51:24,981 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 5 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:51:24,981 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 286 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:51:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2024-10-15 14:51:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2108. [2024-10-15 14:51:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 1095 states have (on average 1.2858447488584475) internal successors, (1408), 1120 states have internal predecessors, (1408), 963 states have call successors, (963), 51 states have call predecessors, (963), 49 states have return successors, (961), 936 states have call predecessors, (961), 961 states have call successors, (961) [2024-10-15 14:51:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3332 transitions. [2024-10-15 14:51:29,587 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3332 transitions. Word has length 157 [2024-10-15 14:51:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:51:29,587 INFO L471 AbstractCegarLoop]: Abstraction has 2108 states and 3332 transitions. [2024-10-15 14:51:29,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-10-15 14:51:29,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3332 transitions. [2024-10-15 14:51:29,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-10-15 14:51:29,590 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:51:29,591 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2024-10-15 14:51:29,599 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-15 14:51:29,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-15 14:51:29,794 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:51:29,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:29,795 INFO L85 PathProgramCache]: Analyzing trace with hash -758309700, now seen corresponding path program 9 times [2024-10-15 14:51:29,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:51:29,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081538235] [2024-10-15 14:51:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:51:29,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:51:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:51:29,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825341647] [2024-10-15 14:51:29,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:51:29,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:51:29,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:51:29,828 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) [2024-10-15 14:51:29,834 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-15 14:51:29,894 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:51:29,894 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:51:29,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-10-15 14:51:29,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:51:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 105 proven. 48 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2024-10-15 14:51:31,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:51:32,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:51:32,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081538235] [2024-10-15 14:51:32,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:51:32,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825341647] [2024-10-15 14:51:32,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825341647] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:51:32,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:51:32,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-10-15 14:51:32,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384454730] [2024-10-15 14:51:32,484 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:51:32,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:51:32,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:51:32,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:51:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:51:32,485 INFO L87 Difference]: Start difference. First operand 2108 states and 3332 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-10-15 14:51:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:51:39,140 INFO L93 Difference]: Finished difference Result 2495 states and 3951 transitions. [2024-10-15 14:51:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 14:51:39,141 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 159 [2024-10-15 14:51:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:51:39,152 INFO L225 Difference]: With dead ends: 2495 [2024-10-15 14:51:39,152 INFO L226 Difference]: Without dead ends: 2490 [2024-10-15 14:51:39,153 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2024-10-15 14:51:39,153 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 75 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-15 14:51:39,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 367 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-15 14:51:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2024-10-15 14:51:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2446. [2024-10-15 14:51:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2446 states, 1256 states have (on average 1.2914012738853504) internal successors, (1622), 1289 states have internal predecessors, (1622), 1135 states have call successors, (1135), 56 states have call predecessors, (1135), 54 states have return successors, (1133), 1100 states have call predecessors, (1133), 1133 states have call successors, (1133) [2024-10-15 14:51:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3890 transitions. [2024-10-15 14:51:44,376 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3890 transitions. Word has length 159 [2024-10-15 14:51:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:51:44,377 INFO L471 AbstractCegarLoop]: Abstraction has 2446 states and 3890 transitions. [2024-10-15 14:51:44,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-10-15 14:51:44,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3890 transitions. [2024-10-15 14:51:44,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-10-15 14:51:44,384 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:51:44,384 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:51:44,398 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-15 14:51:44,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-15 14:51:44,585 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:51:44,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:44,585 INFO L85 PathProgramCache]: Analyzing trace with hash 787427740, now seen corresponding path program 10 times [2024-10-15 14:51:44,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:51:44,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100275344] [2024-10-15 14:51:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:51:44,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:51:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:51:44,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921390098] [2024-10-15 14:51:44,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:51:44,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:51:44,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:51:44,636 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) [2024-10-15 14:51:44,640 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-15 14:51:44,710 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:51:44,710 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:51:44,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-10-15 14:51:44,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:51:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 96 proven. 100 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2024-10-15 14:51:46,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:52:01,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:52:01,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100275344] [2024-10-15 14:52:01,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:52:01,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921390098] [2024-10-15 14:52:01,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921390098] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:52:01,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:52:01,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-10-15 14:52:01,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829615837] [2024-10-15 14:52:01,107 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:52:01,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 14:52:01,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:52:01,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 14:52:01,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1390, Unknown=1, NotChecked=0, Total=1560 [2024-10-15 14:52:01,108 INFO L87 Difference]: Start difference. First operand 2446 states and 3890 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-10-15 14:52:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:52:08,195 INFO L93 Difference]: Finished difference Result 2622 states and 4147 transitions. [2024-10-15 14:52:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 14:52:08,195 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 162 [2024-10-15 14:52:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:52:08,204 INFO L225 Difference]: With dead ends: 2622 [2024-10-15 14:52:08,204 INFO L226 Difference]: Without dead ends: 2617 [2024-10-15 14:52:08,205 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=313, Invalid=2442, Unknown=1, NotChecked=0, Total=2756 [2024-10-15 14:52:08,205 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 95 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 14:52:08,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1055 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 14:52:08,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2024-10-15 14:52:13,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2461. [2024-10-15 14:52:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2461 states, 1266 states have (on average 1.2890995260663507) internal successors, (1632), 1300 states have internal predecessors, (1632), 1137 states have call successors, (1137), 59 states have call predecessors, (1137), 57 states have return successors, (1135), 1101 states have call predecessors, (1135), 1135 states have call successors, (1135) [2024-10-15 14:52:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 3904 transitions. [2024-10-15 14:52:13,361 INFO L78 Accepts]: Start accepts. Automaton has 2461 states and 3904 transitions. Word has length 162 [2024-10-15 14:52:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:52:13,361 INFO L471 AbstractCegarLoop]: Abstraction has 2461 states and 3904 transitions. [2024-10-15 14:52:13,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-10-15 14:52:13,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:52:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2461 states and 3904 transitions. [2024-10-15 14:52:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-10-15 14:52:13,364 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:52:13,364 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:52:13,377 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-15 14:52:13,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-15 14:52:13,568 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:52:13,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:52:13,569 INFO L85 PathProgramCache]: Analyzing trace with hash -998768174, now seen corresponding path program 11 times [2024-10-15 14:52:13,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:52:13,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209141561] [2024-10-15 14:52:13,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:52:13,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:52:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:52:13,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223609978] [2024-10-15 14:52:13,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:52:13,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:52:13,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:52:13,594 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) [2024-10-15 14:52:13,595 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-15 14:52:13,674 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-10-15 14:52:13,674 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:52:13,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-10-15 14:52:13,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:52:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 80 proven. 167 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2024-10-15 14:52:15,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:52:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 80 proven. 158 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-10-15 14:52:23,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:52:23,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209141561] [2024-10-15 14:52:23,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:52:23,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223609978] [2024-10-15 14:52:23,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223609978] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:52:23,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:52:23,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 44 [2024-10-15 14:52:23,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162151843] [2024-10-15 14:52:23,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:52:23,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-15 14:52:23,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:52:23,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-15 14:52:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:52:23,548 INFO L87 Difference]: Start difference. First operand 2461 states and 3904 transitions. Second operand has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 40 states have internal predecessors, (87), 17 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (49), 15 states have call predecessors, (49), 15 states have call successors, (49) [2024-10-15 14:52:48,573 WARN L286 SmtUtils]: Spent 13.47s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)