./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/hard-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 --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 14:34:17,466 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 14:34:17,543 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 14:34:17,550 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 14:34:17,551 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 14:34:17,583 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 14:34:17,584 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 14:34:17,585 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 14:34:17,585 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 14:34:17,589 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 14:34:17,589 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 14:34:17,590 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 14:34:17,590 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 14:34:17,590 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 14:34:17,591 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 14:34:17,591 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 14:34:17,591 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 14:34:17,592 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 14:34:17,593 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 14:34:17,593 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 14:34:17,593 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 14:34:17,594 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 14:34:17,594 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 14:34:17,594 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 14:34:17,595 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 14:34:17,595 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 14:34:17,595 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 14:34:17,595 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 14:34:17,596 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 14:34:17,596 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 14:34:17,596 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 14:34:17,597 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 14:34:17,597 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:34:17,597 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 14:34:17,597 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 14:34:17,605 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 14:34:17,605 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 14:34:17,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 14:34:17,606 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 14:34:17,606 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 14:34:17,606 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 14:34:17,607 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 14:34:17,607 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 14:34:17,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 14:34:17,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 14:34:17,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 14:34:17,863 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 14:34:17,864 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 14:34:17,865 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/hard-ll.c [2024-10-15 14:34:19,252 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 14:34:19,430 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 14:34:19,431 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/hard-ll.c [2024-10-15 14:34:19,443 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5e3086a4a/16a92f5cceff4953a662577d652c54d6/FLAG8194d8a94 [2024-10-15 14:34:19,455 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5e3086a4a/16a92f5cceff4953a662577d652c54d6 [2024-10-15 14:34:19,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 14:34:19,459 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 14:34:19,460 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 14:34:19,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 14:34:19,465 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 14:34:19,465 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,466 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61fdbb5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19, skipping insertion in model container [2024-10-15 14:34:19,466 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,485 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 14:34:19,641 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/hard-ll.c[538,551] [2024-10-15 14:34:19,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:34:19,666 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 14:34:19,677 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/hard-ll.c[538,551] [2024-10-15 14:34:19,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:34:19,705 INFO L204 MainTranslator]: Completed translation [2024-10-15 14:34:19,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19 WrapperNode [2024-10-15 14:34:19,706 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 14:34:19,707 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 14:34:19,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 14:34:19,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 14:34:19,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,723 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,733 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 14:34:19,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 14:34:19,735 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 14:34:19,735 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 14:34:19,735 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 14:34:19,744 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,746 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,756 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 14:34:19,757 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,757 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,760 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,766 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,767 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,772 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,774 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 14:34:19,775 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 14:34:19,775 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 14:34:19,775 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 14:34:19,778 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (1/1) ... [2024-10-15 14:34:19,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:34:19,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:19,807 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 14:34:19,809 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 14:34:19,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 14:34:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 14:34:19,852 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 14:34:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 14:34:19,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 14:34:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 14:34:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 14:34:19,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 14:34:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 14:34:19,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 14:34:19,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 14:34:19,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 14:34:19,903 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 14:34:19,905 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 14:34:20,059 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-10-15 14:34:20,060 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 14:34:20,091 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 14:34:20,092 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-15 14:34:20,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:34:20 BoogieIcfgContainer [2024-10-15 14:34:20,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 14:34:20,097 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 14:34:20,097 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 14:34:20,100 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 14:34:20,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:34:19" (1/3) ... [2024-10-15 14:34:20,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6746f328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:34:20, skipping insertion in model container [2024-10-15 14:34:20,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:34:19" (2/3) ... [2024-10-15 14:34:20,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6746f328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:34:20, skipping insertion in model container [2024-10-15 14:34:20,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:34:20" (3/3) ... [2024-10-15 14:34:20,104 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2024-10-15 14:34:20,122 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 14:34:20,123 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 14:34:20,184 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 14:34:20,195 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;@149e84a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 14:34:20,195 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 14:34:20,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-15 14:34:20,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-15 14:34:20,208 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:20,209 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:34:20,210 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:20,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:20,216 INFO L85 PathProgramCache]: Analyzing trace with hash -909137831, now seen corresponding path program 1 times [2024-10-15 14:34:20,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:20,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309299309] [2024-10-15 14:34:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:20,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:20,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:34:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:20,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:34:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:34:20,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:20,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309299309] [2024-10-15 14:34:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309299309] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:34:20,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:34:20,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-15 14:34:20,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713079854] [2024-10-15 14:34:20,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:34:20,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-15 14:34:20,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:20,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-15 14:34:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:34:20,491 INFO L87 Difference]: Start difference. First operand has 33 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-15 14:34:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:20,528 INFO L93 Difference]: Finished difference Result 58 states and 92 transitions. [2024-10-15 14:34:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-15 14:34:20,531 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-10-15 14:34:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:20,539 INFO L225 Difference]: With dead ends: 58 [2024-10-15 14:34:20,539 INFO L226 Difference]: Without dead ends: 29 [2024-10-15 14:34:20,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 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 14:34:20,547 INFO L432 NwaCegarLoop]: 39 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, 39 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 14:34:20,550 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:34:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-15 14:34:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-15 14:34:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-15 14:34:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-10-15 14:34:20,589 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 16 [2024-10-15 14:34:20,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:20,589 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-10-15 14:34:20,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-15 14:34:20,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-10-15 14:34:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-15 14:34:20,591 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:20,591 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:34:20,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 14:34:20,591 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:20,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash -229079461, now seen corresponding path program 1 times [2024-10-15 14:34:20,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:20,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472739076] [2024-10-15 14:34:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:20,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:20,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:34:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:20,769 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:34:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:34:20,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:20,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472739076] [2024-10-15 14:34:20,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472739076] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:34:20,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:34:20,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:34:20,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697199477] [2024-10-15 14:34:20,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:34:20,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:34:20,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:20,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:34:20,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:34:20,787 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-15 14:34:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:20,862 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-10-15 14:34:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:34:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-10-15 14:34:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:20,866 INFO L225 Difference]: With dead ends: 42 [2024-10-15 14:34:20,867 INFO L226 Difference]: Without dead ends: 40 [2024-10-15 14:34:20,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 14:34:20,870 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:20,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 114 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:34:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-15 14:34:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-10-15 14:34:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-15 14:34:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-10-15 14:34:20,890 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 16 [2024-10-15 14:34:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:20,890 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-10-15 14:34:20,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-15 14:34:20,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-10-15 14:34:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-15 14:34:20,892 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:20,892 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:34:20,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-15 14:34:20,897 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:20,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash 520476838, now seen corresponding path program 1 times [2024-10-15 14:34:20,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:20,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520720087] [2024-10-15 14:34:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:20,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:21,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:34:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:21,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:34:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:21,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-15 14:34:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:34:21,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:21,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520720087] [2024-10-15 14:34:21,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520720087] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:34:21,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:34:21,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:34:21,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977476886] [2024-10-15 14:34:21,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:34:21,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:34:21,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:21,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:34:21,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:34:21,109 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:34:21,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:21,195 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-10-15 14:34:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:34:21,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-10-15 14:34:21,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:21,197 INFO L225 Difference]: With dead ends: 46 [2024-10-15 14:34:21,199 INFO L226 Difference]: Without dead ends: 44 [2024-10-15 14:34:21,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 14:34:21,201 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:21,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:34:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-15 14:34:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-10-15 14:34:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-15 14:34:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-10-15 14:34:21,221 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 21 [2024-10-15 14:34:21,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:21,223 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-10-15 14:34:21,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:34:21,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-10-15 14:34:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-15 14:34:21,226 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:21,226 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:34:21,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-15 14:34:21,226 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:21,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1140086011, now seen corresponding path program 1 times [2024-10-15 14:34:21,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:21,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636412323] [2024-10-15 14:34:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:21,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:21,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488213566] [2024-10-15 14:34:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:21,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:21,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:21,265 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 14:34:21,267 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 14:34:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:21,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:34:21,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:34:21,430 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:34:21,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:21,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636412323] [2024-10-15 14:34:21,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:21,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488213566] [2024-10-15 14:34:21,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488213566] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:34:21,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:34:21,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:34:21,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857902448] [2024-10-15 14:34:21,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:34:21,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:34:21,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:21,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:34:21,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:34:21,436 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:34:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:21,524 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-10-15 14:34:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:34:21,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-10-15 14:34:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:21,527 INFO L225 Difference]: With dead ends: 63 [2024-10-15 14:34:21,527 INFO L226 Difference]: Without dead ends: 50 [2024-10-15 14:34:21,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:34:21,529 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:21,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 113 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:34:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-15 14:34:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-15 14:34:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-15 14:34:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-10-15 14:34:21,542 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 26 [2024-10-15 14:34:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:21,543 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-10-15 14:34:21,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:34:21,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-10-15 14:34:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-15 14:34:21,545 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:21,545 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-15 14:34:21,563 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-15 14:34:21,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:21,746 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:21,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash -975701997, now seen corresponding path program 1 times [2024-10-15 14:34:21,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:21,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744161143] [2024-10-15 14:34:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:21,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:21,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886272803] [2024-10-15 14:34:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:21,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:21,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:21,765 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 14:34:21,767 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 14:34:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:21,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-15 14:34:21,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:34:21,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:34:22,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744161143] [2024-10-15 14:34:22,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886272803] [2024-10-15 14:34:22,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886272803] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:34:22,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:34:22,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-15 14:34:22,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767212914] [2024-10-15 14:34:22,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:22,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-15 14:34:22,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:22,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-15 14:34:22,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:34:22,167 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-15 14:34:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:22,303 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-10-15 14:34:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 14:34:22,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2024-10-15 14:34:22,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:22,306 INFO L225 Difference]: With dead ends: 65 [2024-10-15 14:34:22,307 INFO L226 Difference]: Without dead ends: 63 [2024-10-15 14:34:22,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:34:22,309 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:22,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 140 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:34:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-15 14:34:22,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2024-10-15 14:34:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-15 14:34:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2024-10-15 14:34:22,325 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 33 [2024-10-15 14:34:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:22,326 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2024-10-15 14:34:22,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-15 14:34:22,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2024-10-15 14:34:22,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-15 14:34:22,328 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:22,328 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:34:22,345 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 14:34:22,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:22,533 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:22,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:22,534 INFO L85 PathProgramCache]: Analyzing trace with hash -928833564, now seen corresponding path program 1 times [2024-10-15 14:34:22,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:22,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156193799] [2024-10-15 14:34:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:22,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:22,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287016194] [2024-10-15 14:34:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:22,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:22,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:22,561 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 14:34:22,562 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 14:34:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:22,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-15 14:34:22,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-15 14:34:22,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:34:22,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:22,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156193799] [2024-10-15 14:34:22,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:22,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287016194] [2024-10-15 14:34:22,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287016194] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 14:34:22,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:34:22,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-15 14:34:22,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521096899] [2024-10-15 14:34:22,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:34:22,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:34:22,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:22,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:34:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:34:22,831 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:34:22,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:22,910 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-10-15 14:34:22,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:34:22,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-10-15 14:34:22,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:22,913 INFO L225 Difference]: With dead ends: 70 [2024-10-15 14:34:22,913 INFO L226 Difference]: Without dead ends: 68 [2024-10-15 14:34:22,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:34:22,914 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:22,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:34:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-15 14:34:22,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-10-15 14:34:22,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-15 14:34:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2024-10-15 14:34:22,935 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 43 [2024-10-15 14:34:22,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:22,936 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2024-10-15 14:34:22,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:34:22,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:22,937 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2024-10-15 14:34:22,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-15 14:34:22,938 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:22,938 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 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 14:34:22,955 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 14:34:23,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-15 14:34:23,140 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:23,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:23,140 INFO L85 PathProgramCache]: Analyzing trace with hash -238148106, now seen corresponding path program 1 times [2024-10-15 14:34:23,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:23,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005143529] [2024-10-15 14:34:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:23,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:23,298 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:34:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:23,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:34:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:23,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-15 14:34:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:23,318 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 14:34:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:23,327 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:34:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:23,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:34:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:23,343 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-15 14:34:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:23,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-15 14:34:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-15 14:34:23,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:23,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005143529] [2024-10-15 14:34:23,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005143529] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:34:23,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:34:23,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:34:23,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875575124] [2024-10-15 14:34:23,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:34:23,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:34:23,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:23,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:34:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:34:23,366 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 14:34:23,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:23,429 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2024-10-15 14:34:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:34:23,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 49 [2024-10-15 14:34:23,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:23,433 INFO L225 Difference]: With dead ends: 75 [2024-10-15 14:34:23,435 INFO L226 Difference]: Without dead ends: 63 [2024-10-15 14:34:23,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 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 14:34:23,436 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:23,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:34:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-15 14:34:23,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-10-15 14:34:23,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-15 14:34:23,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-10-15 14:34:23,455 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 49 [2024-10-15 14:34:23,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:23,455 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-10-15 14:34:23,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 14:34:23,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:23,456 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-10-15 14:34:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-15 14:34:23,457 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:23,457 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2024-10-15 14:34:23,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-15 14:34:23,458 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:23,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:23,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1374799408, now seen corresponding path program 1 times [2024-10-15 14:34:23,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:23,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377182212] [2024-10-15 14:34:23,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:23,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:23,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105787216] [2024-10-15 14:34:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:23,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:23,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:23,495 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 14:34:23,496 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 14:34:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:23,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-15 14:34:23,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-15 14:34:24,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-15 14:34:26,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:26,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377182212] [2024-10-15 14:34:26,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:26,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105787216] [2024-10-15 14:34:26,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105787216] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:34:26,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:34:26,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-10-15 14:34:26,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608024768] [2024-10-15 14:34:26,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:26,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 14:34:26,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:26,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 14:34:26,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-10-15 14:34:26,044 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-10-15 14:34:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:27,341 INFO L93 Difference]: Finished difference Result 150 states and 205 transitions. [2024-10-15 14:34:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-15 14:34:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 63 [2024-10-15 14:34:27,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:27,344 INFO L225 Difference]: With dead ends: 150 [2024-10-15 14:34:27,344 INFO L226 Difference]: Without dead ends: 127 [2024-10-15 14:34:27,344 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:34:27,347 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:27,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 244 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:34:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-10-15 14:34:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2024-10-15 14:34:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 64 states have internal predecessors, (71), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2024-10-15 14:34:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 127 transitions. [2024-10-15 14:34:27,403 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 127 transitions. Word has length 63 [2024-10-15 14:34:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:27,404 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 127 transitions. [2024-10-15 14:34:27,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-10-15 14:34:27,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:27,404 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 127 transitions. [2024-10-15 14:34:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-15 14:34:27,406 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:27,406 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 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 14:34:27,424 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 14:34:27,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:27,606 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:27,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:27,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2048390162, now seen corresponding path program 1 times [2024-10-15 14:34:27,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:27,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887125115] [2024-10-15 14:34:27,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:27,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:27,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411690186] [2024-10-15 14:34:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:27,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:27,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:27,633 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 14:34:27,638 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 14:34:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:27,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-15 14:34:27,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-15 14:34:28,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-15 14:34:28,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:28,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887125115] [2024-10-15 14:34:28,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:28,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411690186] [2024-10-15 14:34:28,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411690186] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:34:28,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:34:28,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-10-15 14:34:28,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968256228] [2024-10-15 14:34:28,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:28,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 14:34:28,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:28,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 14:34:28,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-10-15 14:34:28,847 INFO L87 Difference]: Start difference. First operand 102 states and 127 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-10-15 14:34:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:29,375 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2024-10-15 14:34:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:34:29,376 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 74 [2024-10-15 14:34:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:29,378 INFO L225 Difference]: With dead ends: 142 [2024-10-15 14:34:29,378 INFO L226 Difference]: Without dead ends: 108 [2024-10-15 14:34:29,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:34:29,380 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:29,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 359 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:34:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-15 14:34:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2024-10-15 14:34:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-10-15 14:34:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2024-10-15 14:34:29,423 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 74 [2024-10-15 14:34:29,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:29,423 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2024-10-15 14:34:29,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-10-15 14:34:29,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2024-10-15 14:34:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-15 14:34:29,427 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:29,428 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 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] [2024-10-15 14:34:29,444 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 14:34:29,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:29,632 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:29,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash -739625270, now seen corresponding path program 2 times [2024-10-15 14:34:29,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:29,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574447471] [2024-10-15 14:34:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:29,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,799 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:34:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,803 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:34:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-15 14:34:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,813 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 14:34:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:34:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,826 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:34:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,832 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-15 14:34:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 14:34:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-15 14:34:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,846 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-15 14:34:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-15 14:34:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,856 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-15 14:34:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-15 14:34:29,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:29,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574447471] [2024-10-15 14:34:29,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574447471] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:34:29,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805707135] [2024-10-15 14:34:29,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:34:29,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:29,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:29,864 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 14:34:29,866 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 14:34:29,918 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:34:29,918 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:34:29,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:34:29,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-15 14:34:29,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-15 14:34:30,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805707135] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:34:30,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:34:30,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-10-15 14:34:30,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902574272] [2024-10-15 14:34:30,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:30,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:34:30,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:30,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:34:30,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:34:30,052 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2024-10-15 14:34:30,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:30,153 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2024-10-15 14:34:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-15 14:34:30,154 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), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 76 [2024-10-15 14:34:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:30,159 INFO L225 Difference]: With dead ends: 121 [2024-10-15 14:34:30,159 INFO L226 Difference]: Without dead ends: 99 [2024-10-15 14:34:30,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:34:30,160 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:30,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:34:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-15 14:34:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-10-15 14:34:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.152542372881356) internal successors, (68), 61 states have internal predecessors, (68), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-10-15 14:34:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2024-10-15 14:34:30,199 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 76 [2024-10-15 14:34:30,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:30,199 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2024-10-15 14:34:30,200 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), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2024-10-15 14:34:30,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2024-10-15 14:34:30,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-15 14:34:30,205 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:30,205 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:34:30,222 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 14:34:30,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-15 14:34:30,406 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:30,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:30,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1556827571, now seen corresponding path program 1 times [2024-10-15 14:34:30,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:30,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249124045] [2024-10-15 14:34:30,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:30,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:34:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:34:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,680 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-15 14:34:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 14:34:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:34:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,692 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:34:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-15 14:34:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,706 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 14:34:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-15 14:34:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-15 14:34:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,722 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-15 14:34:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,731 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-15 14:34:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-10-15 14:34:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-15 14:34:30,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:30,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249124045] [2024-10-15 14:34:30,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249124045] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:34:30,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042998358] [2024-10-15 14:34:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:30,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:30,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:30,746 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 14:34:30,747 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 14:34:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:30,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-15 14:34:30,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-15 14:34:31,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-15 14:34:31,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042998358] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:34:31,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:34:31,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-10-15 14:34:31,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127753641] [2024-10-15 14:34:31,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:31,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 14:34:31,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:31,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 14:34:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-10-15 14:34:31,500 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2024-10-15 14:34:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:31,784 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2024-10-15 14:34:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:34:31,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) Word has length 79 [2024-10-15 14:34:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:31,786 INFO L225 Difference]: With dead ends: 114 [2024-10-15 14:34:31,786 INFO L226 Difference]: Without dead ends: 97 [2024-10-15 14:34:31,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-10-15 14:34:31,787 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 22 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:31,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 338 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:34:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-15 14:34:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2024-10-15 14:34:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 56 states have internal predecessors, (62), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-10-15 14:34:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2024-10-15 14:34:31,820 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 79 [2024-10-15 14:34:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:31,821 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2024-10-15 14:34:31,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2024-10-15 14:34:31,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2024-10-15 14:34:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-10-15 14:34:31,822 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:31,822 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:34:31,839 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-15 14:34:32,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:32,023 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:32,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:32,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1075113258, now seen corresponding path program 1 times [2024-10-15 14:34:32,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:32,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017817545] [2024-10-15 14:34:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:32,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:34:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:34:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,097 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-15 14:34:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 14:34:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,103 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:34:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,107 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:34:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-15 14:34:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 14:34:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-15 14:34:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,119 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-15 14:34:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,122 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-10-15 14:34:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-15 14:34:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-15 14:34:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-10-15 14:34:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-10-15 14:34:32,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:32,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017817545] [2024-10-15 14:34:32,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017817545] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:34:32,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127878661] [2024-10-15 14:34:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:32,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:32,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:32,138 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 14:34:32,140 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 14:34:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:32,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-15 14:34:32,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-15 14:34:32,231 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:34:32,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127878661] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:34:32,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:34:32,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-10-15 14:34:32,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623095302] [2024-10-15 14:34:32,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:34:32,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:34:32,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:32,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:34:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:34:32,234 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2024-10-15 14:34:32,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:32,300 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2024-10-15 14:34:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:34:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 83 [2024-10-15 14:34:32,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:32,302 INFO L225 Difference]: With dead ends: 97 [2024-10-15 14:34:32,302 INFO L226 Difference]: Without dead ends: 85 [2024-10-15 14:34:32,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:34:32,303 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:32,304 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 105 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:34:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-15 14:34:32,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-10-15 14:34:32,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 52 states have internal predecessors, (57), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-10-15 14:34:32,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2024-10-15 14:34:32,346 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 83 [2024-10-15 14:34:32,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:32,347 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2024-10-15 14:34:32,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2024-10-15 14:34:32,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:32,347 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2024-10-15 14:34:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-10-15 14:34:32,349 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:32,349 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 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] [2024-10-15 14:34:32,365 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-15 14:34:32,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:32,551 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:32,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:32,551 INFO L85 PathProgramCache]: Analyzing trace with hash -802122381, now seen corresponding path program 3 times [2024-10-15 14:34:32,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:32,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162583146] [2024-10-15 14:34:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:32,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:32,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81146390] [2024-10-15 14:34:32,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:34:32,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:32,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:32,580 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 14:34:32,582 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 14:34:32,649 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:34:32,650 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:34:32,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-15 14:34:32,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-10-15 14:34:33,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-10-15 14:34:45,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:45,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162583146] [2024-10-15 14:34:45,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:45,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81146390] [2024-10-15 14:34:45,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81146390] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:34:45,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:34:45,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2024-10-15 14:34:45,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619973032] [2024-10-15 14:34:45,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:45,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 14:34:45,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 14:34:45,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-10-15 14:34:45,604 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2024-10-15 14:34:50,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-15 14:34:51,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:51,649 INFO L93 Difference]: Finished difference Result 165 states and 216 transitions. [2024-10-15 14:34:51,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 14:34:51,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 93 [2024-10-15 14:34:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:51,653 INFO L225 Difference]: With dead ends: 165 [2024-10-15 14:34:51,653 INFO L226 Difference]: Without dead ends: 143 [2024-10-15 14:34:51,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:34:51,657 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 69 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:51,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 409 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-10-15 14:34:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-10-15 14:34:51,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 128. [2024-10-15 14:34:51,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 76 states have (on average 1.144736842105263) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2024-10-15 14:34:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 159 transitions. [2024-10-15 14:34:51,720 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 159 transitions. Word has length 93 [2024-10-15 14:34:51,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:51,722 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 159 transitions. [2024-10-15 14:34:51,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2024-10-15 14:34:51,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:51,723 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 159 transitions. [2024-10-15 14:34:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-10-15 14:34:51,726 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:51,726 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 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] [2024-10-15 14:34:51,740 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 14:34:51,930 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 14:34:51,931 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:51,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:51,931 INFO L85 PathProgramCache]: Analyzing trace with hash 644553835, now seen corresponding path program 2 times [2024-10-15 14:34:51,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:51,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981107395] [2024-10-15 14:34:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:51,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:51,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241776763] [2024-10-15 14:34:51,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:34:51,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:51,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:51,985 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 14:34:51,986 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 14:34:52,049 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:34:52,050 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:34:52,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-15 14:34:52,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-15 14:34:53,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:35:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-15 14:35:02,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:35:02,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981107395] [2024-10-15 14:35:02,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:35:02,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241776763] [2024-10-15 14:35:02,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241776763] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:35:02,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:35:02,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2024-10-15 14:35:02,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780974330] [2024-10-15 14:35:02,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:35:02,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 14:35:02,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:35:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 14:35:02,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-10-15 14:35:02,273 INFO L87 Difference]: Start difference. First operand 128 states and 159 transitions. Second operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 15 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 13 states have call successors, (33) [2024-10-15 14:35:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:35:05,167 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2024-10-15 14:35:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 14:35:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 15 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 13 states have call successors, (33) Word has length 104 [2024-10-15 14:35:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:35:05,170 INFO L225 Difference]: With dead ends: 151 [2024-10-15 14:35:05,170 INFO L226 Difference]: Without dead ends: 149 [2024-10-15 14:35:05,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2024-10-15 14:35:05,171 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 55 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:35:05,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 551 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-15 14:35:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-10-15 14:35:05,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2024-10-15 14:35:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 88 states have internal predecessors, (96), 40 states have call successors, (40), 17 states have call predecessors, (40), 16 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2024-10-15 14:35:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 174 transitions. [2024-10-15 14:35:05,224 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 174 transitions. Word has length 104 [2024-10-15 14:35:05,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:35:05,225 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 174 transitions. [2024-10-15 14:35:05,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 15 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 13 states have call successors, (33) [2024-10-15 14:35:05,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 174 transitions. [2024-10-15 14:35:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-10-15 14:35:05,226 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:35:05,227 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:35:05,251 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 14:35:05,427 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 14:35:05,427 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:35:05,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:05,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1609243655, now seen corresponding path program 4 times [2024-10-15 14:35:05,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:35:05,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827901495] [2024-10-15 14:35:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:35:05,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:35:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,697 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:35:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:35:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-15 14:35:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 14:35:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:35:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:35:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-15 14:35:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,716 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 14:35:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,719 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-15 14:35:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-15 14:35:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-10-15 14:35:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-15 14:35:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,732 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-15 14:35:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,737 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-15 14:35:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-10-15 14:35:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-10-15 14:35:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-10-15 14:35:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-15 14:35:05,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:35:05,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827901495] [2024-10-15 14:35:05,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827901495] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:35:05,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807570769] [2024-10-15 14:35:05,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:35:05,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:35:05,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:35:05,756 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 14:35:05,757 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 14:35:05,818 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:35:05,818 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:35:05,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-15 14:35:05,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:35:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-15 14:35:05,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:35:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-10-15 14:35:06,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807570769] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:35:06,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:35:06,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-10-15 14:35:06,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271795484] [2024-10-15 14:35:06,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:35:06,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 14:35:06,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:35:06,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 14:35:06,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:35:06,059 INFO L87 Difference]: Start difference. First operand 141 states and 174 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2024-10-15 14:35:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:35:06,214 INFO L93 Difference]: Finished difference Result 163 states and 203 transitions. [2024-10-15 14:35:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:35:06,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 106 [2024-10-15 14:35:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:35:06,216 INFO L225 Difference]: With dead ends: 163 [2024-10-15 14:35:06,216 INFO L226 Difference]: Without dead ends: 141 [2024-10-15 14:35:06,217 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:35:06,217 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:35:06,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 247 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:35:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-15 14:35:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2024-10-15 14:35:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 88 states have internal predecessors, (94), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-10-15 14:35:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 170 transitions. [2024-10-15 14:35:06,289 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 170 transitions. Word has length 106 [2024-10-15 14:35:06,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:35:06,290 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 170 transitions. [2024-10-15 14:35:06,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2024-10-15 14:35:06,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:06,290 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 170 transitions. [2024-10-15 14:35:06,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-10-15 14:35:06,292 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:35:06,292 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:35:06,310 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-15 14:35:06,492 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 14:35:06,492 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:35:06,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:06,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1191181482, now seen corresponding path program 2 times [2024-10-15 14:35:06,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:35:06,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111268223] [2024-10-15 14:35:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:35:06,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:35:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,905 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:35:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:35:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-15 14:35:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 14:35:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:35:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:35:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-15 14:35:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,925 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 14:35:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-15 14:35:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-15 14:35:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,937 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-10-15 14:35:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,941 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-15 14:35:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-15 14:35:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-15 14:35:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,954 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-10-15 14:35:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,958 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-10-15 14:35:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,963 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-10-15 14:35:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-10-15 14:35:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-10-15 14:35:06,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:35:06,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111268223] [2024-10-15 14:35:06,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111268223] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:35:06,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004588525] [2024-10-15 14:35:06,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:35:06,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:35:06,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:35:06,974 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 14:35:06,975 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 14:35:07,035 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:35:07,035 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:35:07,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-15 14:35:07,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:35:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-10-15 14:35:07,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:35:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-10-15 14:35:08,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004588525] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:35:08,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:35:08,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 10] total 25 [2024-10-15 14:35:08,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7958759] [2024-10-15 14:35:08,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:35:08,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 14:35:08,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:35:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 14:35:08,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:35:08,353 INFO L87 Difference]: Start difference. First operand 139 states and 170 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 17 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 18 states have call predecessors, (48), 17 states have call successors, (48) [2024-10-15 14:35:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:35:08,874 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2024-10-15 14:35:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:35:08,875 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 17 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 18 states have call predecessors, (48), 17 states have call successors, (48) Word has length 109 [2024-10-15 14:35:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:35:08,876 INFO L225 Difference]: With dead ends: 157 [2024-10-15 14:35:08,876 INFO L226 Difference]: Without dead ends: 121 [2024-10-15 14:35:08,876 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:35:08,877 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 32 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:35:08,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 563 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:35:08,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-15 14:35:08,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2024-10-15 14:35:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 71 states have internal predecessors, (77), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2024-10-15 14:35:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2024-10-15 14:35:08,918 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 109 [2024-10-15 14:35:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:35:08,918 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2024-10-15 14:35:08,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 17 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 18 states have call predecessors, (48), 17 states have call successors, (48) [2024-10-15 14:35:08,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2024-10-15 14:35:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-10-15 14:35:08,920 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:35:08,920 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:35:08,933 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 14:35:09,123 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 14:35:09,123 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:35:09,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:09,123 INFO L85 PathProgramCache]: Analyzing trace with hash 961958804, now seen corresponding path program 3 times [2024-10-15 14:35:09,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:35:09,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634795142] [2024-10-15 14:35:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:35:09,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:35:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:35:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,302 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:35:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-15 14:35:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,306 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 14:35:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:35:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:35:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,316 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-15 14:35:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,318 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 14:35:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,321 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-15 14:35:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-15 14:35:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,327 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-10-15 14:35:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,333 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-15 14:35:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-15 14:35:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,342 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-10-15 14:35:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-10-15 14:35:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-10-15 14:35:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-10-15 14:35:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-10-15 14:35:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-10-15 14:35:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-10-15 14:35:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-10-15 14:35:09,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:35:09,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634795142] [2024-10-15 14:35:09,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634795142] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:35:09,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049029584] [2024-10-15 14:35:09,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:35:09,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:35:09,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:35:09,370 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 14:35:09,372 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 14:35:09,424 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:35:09,425 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:35:09,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-15 14:35:09,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:35:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 132 proven. 4 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2024-10-15 14:35:09,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:35:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2024-10-15 14:35:09,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049029584] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:35:09,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:35:09,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 8] total 21 [2024-10-15 14:35:09,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507489432] [2024-10-15 14:35:09,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:35:09,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:35:09,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:35:09,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:35:09,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:35:09,917 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 21 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 11 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 8 states have call successors, (35) [2024-10-15 14:35:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:35:10,936 INFO L93 Difference]: Finished difference Result 142 states and 165 transitions. [2024-10-15 14:35:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 14:35:10,936 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 11 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 8 states have call successors, (35) Word has length 121 [2024-10-15 14:35:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:35:10,938 INFO L225 Difference]: With dead ends: 142 [2024-10-15 14:35:10,938 INFO L226 Difference]: Without dead ends: 134 [2024-10-15 14:35:10,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2024-10-15 14:35:10,939 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:35:10,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 441 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:35:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-15 14:35:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-10-15 14:35:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 83 states have (on average 1.108433734939759) internal successors, (92), 85 states have internal predecessors, (92), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-10-15 14:35:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2024-10-15 14:35:10,986 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 121 [2024-10-15 14:35:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:35:10,986 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2024-10-15 14:35:10,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 11 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 8 states have call successors, (35) [2024-10-15 14:35:10,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2024-10-15 14:35:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-10-15 14:35:10,987 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:35:10,988 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:35:11,000 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-15 14:35:11,188 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 14:35:11,188 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:35:11,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:11,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1692740848, now seen corresponding path program 5 times [2024-10-15 14:35:11,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:35:11,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724896076] [2024-10-15 14:35:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:35:11,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:35:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:35:11,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139373278] [2024-10-15 14:35:11,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:35:11,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:35:11,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:35:11,242 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 14:35:11,244 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 14:35:11,351 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-10-15 14:35:11,352 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:35:11,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-10-15 14:35:11,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:35:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 71 proven. 67 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-10-15 14:35:12,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:35:43,684 WARN L286 SmtUtils]: Spent 5.36s on a formula simplification that was a NOOP. DAG size: 382 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-15 14:38:24,078 WARN L286 SmtUtils]: Spent 1.65m on a formula simplification. DAG size of input: 344 DAG size of output: 341 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)