./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 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/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 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 11:41:07,548 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:41:07,617 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:41:07,624 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:41:07,626 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:41:07,658 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:41:07,659 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:41:07,660 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:41:07,660 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:41:07,661 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:41:07,662 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:41:07,662 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:41:07,663 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:41:07,663 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:41:07,665 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:41:07,665 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:41:07,666 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:41:07,666 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:41:07,666 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:41:07,666 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:41:07,667 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:41:07,670 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:41:07,671 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:41:07,671 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:41:07,671 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:41:07,671 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:41:07,672 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:41:07,672 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:41:07,672 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:41:07,672 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:41:07,673 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:41:07,673 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:41:07,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:41:07,673 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:41:07,673 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:41:07,673 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:41:07,674 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:41:07,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:41:07,674 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:41:07,674 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:41:07,675 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:41:07,675 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:41:07,675 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:41:07,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:41:07,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:41:07,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:41:07,955 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:41:07,955 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:41:07,956 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/hard-ll.c [2024-09-21 11:41:09,393 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:41:09,560 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:41:09,560 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/hard-ll.c [2024-09-21 11:41:09,568 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/20bd154a9/a14ee72c79db425b97b47773c7f7f7cb/FLAGb9fea4f19 [2024-09-21 11:41:09,579 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/20bd154a9/a14ee72c79db425b97b47773c7f7f7cb [2024-09-21 11:41:09,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:41:09,583 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:41:09,584 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:41:09,586 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:41:09,591 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:41:09,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abb7325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09, skipping insertion in model container [2024-09-21 11:41:09,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,613 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:41:09,748 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] [2024-09-21 11:41:09,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:41:09,771 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:41:09,782 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] [2024-09-21 11:41:09,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:41:09,820 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:41:09,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09 WrapperNode [2024-09-21 11:41:09,821 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:41:09,823 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:41:09,823 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:41:09,823 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:41:09,829 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,842 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:41:09,842 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:41:09,843 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:41:09,843 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:41:09,843 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:41:09,853 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,859 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,889 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-21 11:41:09,890 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,890 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,893 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,902 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,903 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,904 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:41:09,909 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:41:09,909 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:41:09,909 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:41:09,910 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (1/1) ... [2024-09-21 11:41:09,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:41:09,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:09,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 11:41:09,944 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 11:41:09,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:41:09,990 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 11:41:09,990 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 11:41:09,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:41:09,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:41:09,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:41:09,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:41:09,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:41:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:41:09,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:41:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:41:09,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:41:10,056 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:41:10,058 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:41:10,328 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-21 11:41:10,329 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:41:10,354 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:41:10,355 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-21 11:41:10,356 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:41:10 BoogieIcfgContainer [2024-09-21 11:41:10,356 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:41:10,359 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:41:10,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:41:10,362 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:41:10,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:41:09" (1/3) ... [2024-09-21 11:41:10,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@376a0aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:41:10, skipping insertion in model container [2024-09-21 11:41:10,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:41:09" (2/3) ... [2024-09-21 11:41:10,364 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@376a0aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:41:10, skipping insertion in model container [2024-09-21 11:41:10,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:41:10" (3/3) ... [2024-09-21 11:41:10,366 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2024-09-21 11:41:10,382 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:41:10,383 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:41:10,439 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:41:10,445 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2f940643, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:41:10,445 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:41:10,449 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) [2024-09-21 11:41:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-21 11:41:10,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:10,457 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:41:10,457 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:10,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:10,463 INFO L85 PathProgramCache]: Analyzing trace with hash -909137831, now seen corresponding path program 1 times [2024-09-21 11:41:10,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:10,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044022107] [2024-09-21 11:41:10,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:10,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:10,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:41:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:10,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:41:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:41:10,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:10,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044022107] [2024-09-21 11:41:10,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044022107] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:41:10,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:41:10,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 11:41:10,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992958885] [2024-09-21 11:41:10,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:41:10,612 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 11:41:10,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:10,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 11:41:10,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:41:10,631 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) [2024-09-21 11:41:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:10,654 INFO L93 Difference]: Finished difference Result 58 states and 92 transitions. [2024-09-21 11:41:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 11:41:10,656 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 [2024-09-21 11:41:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:10,661 INFO L225 Difference]: With dead ends: 58 [2024-09-21 11:41:10,661 INFO L226 Difference]: Without dead ends: 29 [2024-09-21 11:41:10,664 INFO L433 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 [2024-09-21 11:41:10,667 INFO L434 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 [2024-09-21 11:41:10,668 INFO L435 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] [2024-09-21 11:41:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-21 11:41:10,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-21 11:41:10,701 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) [2024-09-21 11:41:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-09-21 11:41:10,704 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 16 [2024-09-21 11:41:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:10,705 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-09-21 11:41:10,705 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (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) [2024-09-21 11:41:10,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:10,707 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-09-21 11:41:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-21 11:41:10,707 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:10,707 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:41:10,708 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:41:10,708 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:10,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:10,708 INFO L85 PathProgramCache]: Analyzing trace with hash -229079461, now seen corresponding path program 1 times [2024-09-21 11:41:10,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:10,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782162878] [2024-09-21 11:41:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:10,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:10,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:41:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:10,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:41:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:41:10,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:10,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782162878] [2024-09-21 11:41:10,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782162878] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:41:10,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:41:10,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:41:10,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823168931] [2024-09-21 11:41:10,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:41:10,865 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:41:10,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:10,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:41:10,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:41:10,868 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) [2024-09-21 11:41:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:10,932 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-09-21 11:41:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:41:10,933 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 [2024-09-21 11:41:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:10,934 INFO L225 Difference]: With dead ends: 42 [2024-09-21 11:41:10,934 INFO L226 Difference]: Without dead ends: 40 [2024-09-21 11:41:10,935 INFO L433 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 [2024-09-21 11:41:10,936 INFO L434 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 [2024-09-21 11:41:10,936 INFO L435 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] [2024-09-21 11:41:10,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-21 11:41:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-09-21 11:41:10,945 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) [2024-09-21 11:41:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-21 11:41:10,947 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 16 [2024-09-21 11:41:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:10,947 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-21 11:41:10,948 INFO L475 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) [2024-09-21 11:41:10,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-21 11:41:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-21 11:41:10,949 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:10,949 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:41:10,949 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 11:41:10,950 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:10,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:10,950 INFO L85 PathProgramCache]: Analyzing trace with hash 520476838, now seen corresponding path program 1 times [2024-09-21 11:41:10,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:10,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718813516] [2024-09-21 11:41:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:10,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:11,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:41:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:11,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:41:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:11,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-21 11:41:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:41:11,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718813516] [2024-09-21 11:41:11,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718813516] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:41:11,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:41:11,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:41:11,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060846079] [2024-09-21 11:41:11,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:41:11,118 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:41:11,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:11,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:41:11,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:41:11,120 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) [2024-09-21 11:41:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:11,199 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-09-21 11:41:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:41:11,200 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 [2024-09-21 11:41:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:11,202 INFO L225 Difference]: With dead ends: 46 [2024-09-21 11:41:11,204 INFO L226 Difference]: Without dead ends: 44 [2024-09-21 11:41:11,204 INFO L433 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 [2024-09-21 11:41:11,207 INFO L434 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 [2024-09-21 11:41:11,207 INFO L435 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] [2024-09-21 11:41:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-21 11:41:11,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-09-21 11:41:11,227 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) [2024-09-21 11:41:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-09-21 11:41:11,228 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 21 [2024-09-21 11:41:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:11,229 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-09-21 11:41:11,233 INFO L475 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) [2024-09-21 11:41:11,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:11,234 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-09-21 11:41:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-21 11:41:11,234 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:11,234 INFO L216 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] [2024-09-21 11:41:11,235 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-21 11:41:11,235 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:11,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:11,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1140086011, now seen corresponding path program 1 times [2024-09-21 11:41:11,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:11,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642594912] [2024-09-21 11:41:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:11,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:41:11,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022237180] [2024-09-21 11:41:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:11,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:11,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:11,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:11,271 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:41:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:11,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 11:41:11,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:41:11,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:41:11,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:11,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642594912] [2024-09-21 11:41:11,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:41:11,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022237180] [2024-09-21 11:41:11,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022237180] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:41:11,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:41:11,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:41:11,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935304894] [2024-09-21 11:41:11,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:41:11,466 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:41:11,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:11,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:41:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:41:11,469 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) [2024-09-21 11:41:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:11,575 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-09-21 11:41:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:41:11,576 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 [2024-09-21 11:41:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:11,577 INFO L225 Difference]: With dead ends: 63 [2024-09-21 11:41:11,577 INFO L226 Difference]: Without dead ends: 50 [2024-09-21 11:41:11,578 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:41:11,579 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-21 11:41:11,579 INFO L435 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] [2024-09-21 11:41:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-21 11:41:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-21 11:41:11,593 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) [2024-09-21 11:41:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-09-21 11:41:11,595 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 26 [2024-09-21 11:41:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:11,595 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-09-21 11:41:11,595 INFO L475 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) [2024-09-21 11:41:11,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-09-21 11:41:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-21 11:41:11,598 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:11,599 INFO L216 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] [2024-09-21 11:41:11,615 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 11:41:11,799 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:11,800 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:11,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash -975701997, now seen corresponding path program 1 times [2024-09-21 11:41:11,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:11,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297647214] [2024-09-21 11:41:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:11,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:41:11,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923931291] [2024-09-21 11:41:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:11,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:11,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:11,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:11,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:41:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:11,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-21 11:41:11,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 11:41:12,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 11:41:12,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297647214] [2024-09-21 11:41:12,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:41:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923931291] [2024-09-21 11:41:12,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923931291] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:12,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:41:12,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-21 11:41:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271897263] [2024-09-21 11:41:12,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:12,226 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 11:41:12,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 11:41:12,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-21 11:41:12,227 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) [2024-09-21 11:41:12,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:12,369 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-21 11:41:12,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 11:41:12,370 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 [2024-09-21 11:41:12,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:12,372 INFO L225 Difference]: With dead ends: 65 [2024-09-21 11:41:12,372 INFO L226 Difference]: Without dead ends: 63 [2024-09-21 11:41:12,373 INFO L433 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 [2024-09-21 11:41:12,374 INFO L434 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 [2024-09-21 11:41:12,374 INFO L435 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] [2024-09-21 11:41:12,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-21 11:41:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2024-09-21 11:41:12,392 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) [2024-09-21 11:41:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2024-09-21 11:41:12,394 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 33 [2024-09-21 11:41:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:12,394 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2024-09-21 11:41:12,397 INFO L475 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) [2024-09-21 11:41:12,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2024-09-21 11:41:12,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-21 11:41:12,399 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:12,399 INFO L216 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] [2024-09-21 11:41:12,417 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-21 11:41:12,604 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:12,605 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:12,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:12,605 INFO L85 PathProgramCache]: Analyzing trace with hash -928833564, now seen corresponding path program 1 times [2024-09-21 11:41:12,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:12,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147617195] [2024-09-21 11:41:12,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:12,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:41:12,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712106379] [2024-09-21 11:41:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:12,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:12,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:12,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:12,641 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:41:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:12,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-21 11:41:12,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 11:41:12,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-21 11:41:12,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:12,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147617195] [2024-09-21 11:41:12,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:41:12,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712106379] [2024-09-21 11:41:12,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712106379] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 11:41:12,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:41:12,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-21 11:41:12,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911419037] [2024-09-21 11:41:12,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:41:12,939 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:41:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:41:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-21 11:41:12,939 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) [2024-09-21 11:41:13,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:13,036 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-09-21 11:41:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:41:13,036 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 [2024-09-21 11:41:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:13,039 INFO L225 Difference]: With dead ends: 70 [2024-09-21 11:41:13,040 INFO L226 Difference]: Without dead ends: 68 [2024-09-21 11:41:13,040 INFO L433 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 [2024-09-21 11:41:13,041 INFO L434 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 [2024-09-21 11:41:13,041 INFO L435 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] [2024-09-21 11:41:13,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-21 11:41:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-09-21 11:41:13,072 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) [2024-09-21 11:41:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2024-09-21 11:41:13,078 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 43 [2024-09-21 11:41:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:13,078 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2024-09-21 11:41:13,078 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 11:41:13,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2024-09-21 11:41:13,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-21 11:41:13,080 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:13,081 INFO L216 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] [2024-09-21 11:41:13,098 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 11:41:13,282 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-21 11:41:13,283 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:13,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:13,283 INFO L85 PathProgramCache]: Analyzing trace with hash -238148106, now seen corresponding path program 1 times [2024-09-21 11:41:13,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:13,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819902758] [2024-09-21 11:41:13,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:13,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:13,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:41:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:13,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:41:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:13,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-21 11:41:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:13,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 11:41:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:13,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:41:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:13,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 11:41:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:13,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-21 11:41:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:13,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-21 11:41:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-21 11:41:13,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:13,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819902758] [2024-09-21 11:41:13,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819902758] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:41:13,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:41:13,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:41:13,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858956223] [2024-09-21 11:41:13,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:41:13,528 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:41:13,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:13,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:41:13,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:41:13,530 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) [2024-09-21 11:41:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:13,607 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2024-09-21 11:41:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:41:13,608 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 [2024-09-21 11:41:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:13,609 INFO L225 Difference]: With dead ends: 75 [2024-09-21 11:41:13,609 INFO L226 Difference]: Without dead ends: 63 [2024-09-21 11:41:13,609 INFO L433 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 [2024-09-21 11:41:13,610 INFO L434 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 [2024-09-21 11:41:13,610 INFO L435 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] [2024-09-21 11:41:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-21 11:41:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-21 11:41:13,622 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) [2024-09-21 11:41:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-09-21 11:41:13,623 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 49 [2024-09-21 11:41:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:13,624 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-09-21 11:41:13,624 INFO L475 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) [2024-09-21 11:41:13,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-09-21 11:41:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-21 11:41:13,629 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:13,629 INFO L216 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] [2024-09-21 11:41:13,629 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-21 11:41:13,630 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:13,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:13,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1374799408, now seen corresponding path program 1 times [2024-09-21 11:41:13,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:13,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991508352] [2024-09-21 11:41:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:13,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:41:13,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066676249] [2024-09-21 11:41:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:13,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:13,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:13,673 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:13,675 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:41:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:13,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-21 11:41:13,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-21 11:41:14,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-21 11:41:16,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:16,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991508352] [2024-09-21 11:41:16,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:41:16,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066676249] [2024-09-21 11:41:16,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066676249] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:16,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:41:16,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-09-21 11:41:16,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411079875] [2024-09-21 11:41:16,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:16,170 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 11:41:16,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:16,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 11:41:16,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-21 11:41:16,171 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) [2024-09-21 11:41:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:17,402 INFO L93 Difference]: Finished difference Result 150 states and 205 transitions. [2024-09-21 11:41:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-21 11:41:17,403 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 [2024-09-21 11:41:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:17,405 INFO L225 Difference]: With dead ends: 150 [2024-09-21 11:41:17,406 INFO L226 Difference]: Without dead ends: 127 [2024-09-21 11:41:17,406 INFO L433 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 [2024-09-21 11:41:17,407 INFO L434 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 [2024-09-21 11:41:17,407 INFO L435 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] [2024-09-21 11:41:17,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-21 11:41:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2024-09-21 11:41:17,471 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) [2024-09-21 11:41:17,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 127 transitions. [2024-09-21 11:41:17,475 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 127 transitions. Word has length 63 [2024-09-21 11:41:17,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:17,476 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 127 transitions. [2024-09-21 11:41:17,477 INFO L475 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) [2024-09-21 11:41:17,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 127 transitions. [2024-09-21 11:41:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-21 11:41:17,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:17,479 INFO L216 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] [2024-09-21 11:41:17,496 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 11:41:17,679 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:17,680 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:17,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:17,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2048390162, now seen corresponding path program 1 times [2024-09-21 11:41:17,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:17,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840255149] [2024-09-21 11:41:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:17,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:41:17,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353440447] [2024-09-21 11:41:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:17,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:17,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:17,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:17,713 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:41:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:17,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-21 11:41:17,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-21 11:41:18,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-21 11:41:18,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:18,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840255149] [2024-09-21 11:41:18,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:41:18,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353440447] [2024-09-21 11:41:18,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353440447] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:18,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:41:18,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-21 11:41:18,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378221284] [2024-09-21 11:41:18,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:18,843 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-21 11:41:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-21 11:41:18,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-21 11:41:18,844 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) [2024-09-21 11:41:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:19,341 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2024-09-21 11:41:19,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 11:41:19,342 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 [2024-09-21 11:41:19,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:19,344 INFO L225 Difference]: With dead ends: 142 [2024-09-21 11:41:19,344 INFO L226 Difference]: Without dead ends: 108 [2024-09-21 11:41:19,345 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-21 11:41:19,345 INFO L434 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 [2024-09-21 11:41:19,346 INFO L435 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] [2024-09-21 11:41:19,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-21 11:41:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2024-09-21 11:41:19,380 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) [2024-09-21 11:41:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2024-09-21 11:41:19,382 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 74 [2024-09-21 11:41:19,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:19,383 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2024-09-21 11:41:19,383 INFO L475 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) [2024-09-21 11:41:19,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2024-09-21 11:41:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-21 11:41:19,388 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:19,389 INFO L216 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] [2024-09-21 11:41:19,405 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 11:41:19,592 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:19,593 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:19,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:19,593 INFO L85 PathProgramCache]: Analyzing trace with hash -739625270, now seen corresponding path program 2 times [2024-09-21 11:41:19,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:19,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936552397] [2024-09-21 11:41:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:19,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:41:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:41:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-21 11:41:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 11:41:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:41:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 11:41:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-21 11:41:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-21 11:41:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-21 11:41:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-21 11:41:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-21 11:41:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-21 11:41:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-21 11:41:19,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:19,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936552397] [2024-09-21 11:41:19,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936552397] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:41:19,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853054442] [2024-09-21 11:41:19,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:41:19,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:19,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:19,845 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:19,847 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:41:19,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:41:19,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:41:19,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 11:41:19,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-21 11:41:19,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-21 11:41:20,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853054442] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:20,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:41:20,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-21 11:41:20,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203422588] [2024-09-21 11:41:20,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:20,024 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:41:20,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:20,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:41:20,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:41:20,024 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) [2024-09-21 11:41:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:20,104 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2024-09-21 11:41:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-21 11:41:20,105 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 [2024-09-21 11:41:20,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:20,109 INFO L225 Difference]: With dead ends: 121 [2024-09-21 11:41:20,109 INFO L226 Difference]: Without dead ends: 99 [2024-09-21 11:41:20,110 INFO L433 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 [2024-09-21 11:41:20,111 INFO L434 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:41:20,111 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:41:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-21 11:41:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-09-21 11:41:20,148 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) [2024-09-21 11:41:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2024-09-21 11:41:20,150 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 76 [2024-09-21 11:41:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:20,151 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2024-09-21 11:41:20,151 INFO L475 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) [2024-09-21 11:41:20,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2024-09-21 11:41:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-21 11:41:20,153 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:20,153 INFO L216 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] [2024-09-21 11:41:20,170 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-21 11:41:20,353 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-21 11:41:20,353 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:20,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:20,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1556827571, now seen corresponding path program 1 times [2024-09-21 11:41:20,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:20,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350978566] [2024-09-21 11:41:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:20,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:41:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:41:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-21 11:41:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 11:41:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:41:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 11:41:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-21 11:41:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-21 11:41:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-21 11:41:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-21 11:41:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-21 11:41:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-21 11:41:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-21 11:41:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-21 11:41:20,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:20,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350978566] [2024-09-21 11:41:20,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350978566] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:41:20,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690791240] [2024-09-21 11:41:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:20,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:20,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:20,726 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:20,728 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 11:41:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:20,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-21 11:41:20,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-21 11:41:21,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-21 11:41:21,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690791240] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:21,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:41:21,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-09-21 11:41:21,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927388967] [2024-09-21 11:41:21,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:21,617 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 11:41:21,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 11:41:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-21 11:41:21,618 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) [2024-09-21 11:41:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:21,940 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2024-09-21 11:41:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-21 11:41:21,941 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 [2024-09-21 11:41:21,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:21,942 INFO L225 Difference]: With dead ends: 114 [2024-09-21 11:41:21,943 INFO L226 Difference]: Without dead ends: 97 [2024-09-21 11:41:21,943 INFO L433 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 [2024-09-21 11:41:21,944 INFO L434 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 [2024-09-21 11:41:21,944 INFO L435 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] [2024-09-21 11:41:21,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-21 11:41:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2024-09-21 11:41:21,989 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) [2024-09-21 11:41:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2024-09-21 11:41:21,990 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 79 [2024-09-21 11:41:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:21,992 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2024-09-21 11:41:21,992 INFO L475 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) [2024-09-21 11:41:21,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2024-09-21 11:41:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-21 11:41:21,994 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:21,994 INFO L216 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] [2024-09-21 11:41:22,018 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-21 11:41:22,198 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:22,199 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:22,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:22,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1075113258, now seen corresponding path program 1 times [2024-09-21 11:41:22,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:22,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011887127] [2024-09-21 11:41:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:41:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:41:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-21 11:41:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 11:41:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:41:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 11:41:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-21 11:41:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-21 11:41:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-21 11:41:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-21 11:41:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-21 11:41:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-21 11:41:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-21 11:41:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-21 11:41:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-21 11:41:22,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:22,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011887127] [2024-09-21 11:41:22,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011887127] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:41:22,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329345539] [2024-09-21 11:41:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:22,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:22,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:22,316 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:22,317 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 11:41:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:22,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-21 11:41:22,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-21 11:41:22,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:41:22,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329345539] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:41:22,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:41:22,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-21 11:41:22,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229427639] [2024-09-21 11:41:22,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:41:22,404 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:41:22,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:22,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:41:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:41:22,405 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) [2024-09-21 11:41:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:22,473 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2024-09-21 11:41:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:41:22,474 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 [2024-09-21 11:41:22,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:22,475 INFO L225 Difference]: With dead ends: 97 [2024-09-21 11:41:22,475 INFO L226 Difference]: Without dead ends: 85 [2024-09-21 11:41:22,475 INFO L433 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 [2024-09-21 11:41:22,476 INFO L434 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 [2024-09-21 11:41:22,476 INFO L435 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] [2024-09-21 11:41:22,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-21 11:41:22,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-09-21 11:41:22,503 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) [2024-09-21 11:41:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2024-09-21 11:41:22,504 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 83 [2024-09-21 11:41:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:22,504 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2024-09-21 11:41:22,505 INFO L475 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) [2024-09-21 11:41:22,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2024-09-21 11:41:22,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-21 11:41:22,506 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:22,506 INFO L216 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] [2024-09-21 11:41:22,522 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-21 11:41:22,710 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:22,711 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:22,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash -802122381, now seen corresponding path program 3 times [2024-09-21 11:41:22,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:22,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549787015] [2024-09-21 11:41:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:22,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:41:22,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633868707] [2024-09-21 11:41:22,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:41:22,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:22,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:22,750 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:22,751 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 11:41:22,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-21 11:41:22,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:41:22,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-21 11:41:22,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-21 11:41:23,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-21 11:41:35,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:35,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549787015] [2024-09-21 11:41:35,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:41:35,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633868707] [2024-09-21 11:41:35,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633868707] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:35,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:41:35,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2024-09-21 11:41:35,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126780482] [2024-09-21 11:41:35,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:35,556 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 11:41:35,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:35,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 11:41:35,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-21 11:41:35,557 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) [2024-09-21 11:41:40,823 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 [] [2024-09-21 11:41:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:41,507 INFO L93 Difference]: Finished difference Result 165 states and 216 transitions. [2024-09-21 11:41:41,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-21 11:41:41,508 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 [2024-09-21 11:41:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:41,509 INFO L225 Difference]: With dead ends: 165 [2024-09-21 11:41:41,509 INFO L226 Difference]: Without dead ends: 143 [2024-09-21 11:41:41,509 INFO L433 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 [2024-09-21 11:41:41,510 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 69 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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 [2024-09-21 11:41:41,510 INFO L435 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] [2024-09-21 11:41:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-21 11:41:41,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 128. [2024-09-21 11:41:41,568 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) [2024-09-21 11:41:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 159 transitions. [2024-09-21 11:41:41,569 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 159 transitions. Word has length 93 [2024-09-21 11:41:41,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:41,572 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 159 transitions. [2024-09-21 11:41:41,572 INFO L475 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) [2024-09-21 11:41:41,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 159 transitions. [2024-09-21 11:41:41,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-21 11:41:41,575 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:41,575 INFO L216 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] [2024-09-21 11:41:41,591 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-21 11:41:41,776 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-21 11:41:41,776 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:41,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:41,777 INFO L85 PathProgramCache]: Analyzing trace with hash 644553835, now seen corresponding path program 2 times [2024-09-21 11:41:41,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:41,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974403752] [2024-09-21 11:41:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:41,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:41:41,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998381837] [2024-09-21 11:41:41,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:41:41,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:41,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:41,823 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:41,824 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 11:41:41,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:41:41,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:41:41,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-21 11:41:41,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-21 11:41:42,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-21 11:41:52,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:52,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974403752] [2024-09-21 11:41:52,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:41:52,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998381837] [2024-09-21 11:41:52,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998381837] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:52,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:41:52,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2024-09-21 11:41:52,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986417765] [2024-09-21 11:41:52,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:52,155 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-21 11:41:52,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:52,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-21 11:41:52,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-09-21 11:41:52,156 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) [2024-09-21 11:41:54,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:54,985 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2024-09-21 11:41:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-21 11:41:54,986 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 [2024-09-21 11:41:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:54,987 INFO L225 Difference]: With dead ends: 151 [2024-09-21 11:41:54,988 INFO L226 Difference]: Without dead ends: 149 [2024-09-21 11:41:54,988 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2024-09-21 11:41:54,989 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 55 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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 [2024-09-21 11:41:54,989 INFO L435 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] [2024-09-21 11:41:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-21 11:41:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2024-09-21 11:41:55,038 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) [2024-09-21 11:41:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 174 transitions. [2024-09-21 11:41:55,039 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 174 transitions. Word has length 104 [2024-09-21 11:41:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:55,040 INFO L474 AbstractCegarLoop]: Abstraction has 141 states and 174 transitions. [2024-09-21 11:41:55,040 INFO L475 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) [2024-09-21 11:41:55,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 174 transitions. [2024-09-21 11:41:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-21 11:41:55,041 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:55,041 INFO L216 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] [2024-09-21 11:41:55,056 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-21 11:41:55,242 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-21 11:41:55,242 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:55,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:55,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1609243655, now seen corresponding path program 4 times [2024-09-21 11:41:55,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:55,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372517838] [2024-09-21 11:41:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:55,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:41:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:41:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-21 11:41:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 11:41:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:41:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 11:41:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-21 11:41:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-21 11:41:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-21 11:41:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-21 11:41:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-21 11:41:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-21 11:41:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-21 11:41:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-21 11:41:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-21 11:41:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-21 11:41:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-21 11:41:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-21 11:41:55,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:55,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372517838] [2024-09-21 11:41:55,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372517838] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:41:55,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133798105] [2024-09-21 11:41:55,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:41:55,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:55,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:55,550 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:55,551 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-21 11:41:55,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:41:55,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:41:55,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-21 11:41:55,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-21 11:41:55,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-21 11:41:55,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133798105] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:55,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:41:55,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-09-21 11:41:55,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587312435] [2024-09-21 11:41:55,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:55,851 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-21 11:41:55,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:55,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-21 11:41:55,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-21 11:41:55,853 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) [2024-09-21 11:41:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:55,977 INFO L93 Difference]: Finished difference Result 163 states and 203 transitions. [2024-09-21 11:41:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:41:55,978 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 [2024-09-21 11:41:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:55,979 INFO L225 Difference]: With dead ends: 163 [2024-09-21 11:41:55,979 INFO L226 Difference]: Without dead ends: 141 [2024-09-21 11:41:55,980 INFO L433 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 [2024-09-21 11:41:55,980 INFO L434 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 [2024-09-21 11:41:55,980 INFO L435 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] [2024-09-21 11:41:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-21 11:41:56,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2024-09-21 11:41:56,036 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) [2024-09-21 11:41:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 170 transitions. [2024-09-21 11:41:56,037 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 170 transitions. Word has length 106 [2024-09-21 11:41:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:56,037 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 170 transitions. [2024-09-21 11:41:56,038 INFO L475 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) [2024-09-21 11:41:56,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 170 transitions. [2024-09-21 11:41:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-21 11:41:56,039 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:56,039 INFO L216 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] [2024-09-21 11:41:56,056 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-21 11:41:56,239 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-21 11:41:56,240 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:56,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1191181482, now seen corresponding path program 2 times [2024-09-21 11:41:56,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:56,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303995663] [2024-09-21 11:41:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:56,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:41:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:41:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-21 11:41:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 11:41:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:41:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 11:41:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-21 11:41:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-21 11:41:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-21 11:41:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-21 11:41:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-21 11:41:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-21 11:41:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-21 11:41:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-21 11:41:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-21 11:41:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-21 11:41:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-21 11:41:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-21 11:41:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-21 11:41:56,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:56,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303995663] [2024-09-21 11:41:56,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303995663] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:41:56,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142730736] [2024-09-21 11:41:56,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:41:56,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:56,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:56,685 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:56,686 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-21 11:41:56,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:41:56,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:41:56,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-21 11:41:56,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-21 11:41:57,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-21 11:41:57,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142730736] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:57,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:41:57,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 10] total 25 [2024-09-21 11:41:57,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749730404] [2024-09-21 11:41:57,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:57,911 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-21 11:41:57,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:57,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-21 11:41:57,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2024-09-21 11:41:57,912 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) [2024-09-21 11:41:58,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:58,394 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2024-09-21 11:41:58,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 11:41:58,395 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 [2024-09-21 11:41:58,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:58,396 INFO L225 Difference]: With dead ends: 157 [2024-09-21 11:41:58,396 INFO L226 Difference]: Without dead ends: 121 [2024-09-21 11:41:58,396 INFO L433 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 [2024-09-21 11:41:58,397 INFO L434 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 [2024-09-21 11:41:58,397 INFO L435 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] [2024-09-21 11:41:58,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-21 11:41:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2024-09-21 11:41:58,434 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) [2024-09-21 11:41:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2024-09-21 11:41:58,435 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 109 [2024-09-21 11:41:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:58,435 INFO L474 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2024-09-21 11:41:58,436 INFO L475 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) [2024-09-21 11:41:58,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2024-09-21 11:41:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-21 11:41:58,437 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:58,437 INFO L216 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] [2024-09-21 11:41:58,454 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-21 11:41:58,637 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-21 11:41:58,638 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:58,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:58,638 INFO L85 PathProgramCache]: Analyzing trace with hash 961958804, now seen corresponding path program 3 times [2024-09-21 11:41:58,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:58,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071637312] [2024-09-21 11:41:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:58,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:41:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:41:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-21 11:41:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 11:41:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:41:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 11:41:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-21 11:41:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-21 11:41:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-21 11:41:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-21 11:41:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-21 11:41:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-21 11:41:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-21 11:41:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-21 11:41:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-21 11:41:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-21 11:41:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-21 11:41:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-21 11:41:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-21 11:41:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-21 11:41:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-21 11:41:58,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:58,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071637312] [2024-09-21 11:41:58,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071637312] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:41:58,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102369942] [2024-09-21 11:41:58,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:41:58,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:58,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:58,857 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:58,858 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-21 11:41:58,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-21 11:41:58,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:41:58,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-21 11:41:58,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 132 proven. 4 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2024-09-21 11:41:59,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2024-09-21 11:41:59,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102369942] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:59,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:41:59,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 8] total 21 [2024-09-21 11:41:59,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360660774] [2024-09-21 11:41:59,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:59,373 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 11:41:59,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:59,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 11:41:59,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-09-21 11:41:59,374 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) [2024-09-21 11:42:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:42:00,382 INFO L93 Difference]: Finished difference Result 142 states and 165 transitions. [2024-09-21 11:42:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 11:42:00,382 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 [2024-09-21 11:42:00,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:42:00,384 INFO L225 Difference]: With dead ends: 142 [2024-09-21 11:42:00,384 INFO L226 Difference]: Without dead ends: 134 [2024-09-21 11:42:00,384 INFO L433 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 [2024-09-21 11:42:00,385 INFO L434 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 [2024-09-21 11:42:00,385 INFO L435 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] [2024-09-21 11:42:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-21 11:42:00,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-09-21 11:42:00,442 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) [2024-09-21 11:42:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2024-09-21 11:42:00,443 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 121 [2024-09-21 11:42:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:42:00,443 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2024-09-21 11:42:00,444 INFO L475 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) [2024-09-21 11:42:00,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:42:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2024-09-21 11:42:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-21 11:42:00,445 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:42:00,445 INFO L216 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] [2024-09-21 11:42:00,457 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-21 11:42:00,645 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-21 11:42:00,645 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:42:00,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:42:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1692740848, now seen corresponding path program 5 times [2024-09-21 11:42:00,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:42:00,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28494529] [2024-09-21 11:42:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:42:00,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:42:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:42:00,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831037836] [2024-09-21 11:42:00,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:42:00,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:42:00,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:42:00,680 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:42:00,684 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-21 11:42:00,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-21 11:42:00,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:42:00,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-21 11:42:00,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:42:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 71 proven. 67 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-09-21 11:42:01,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:42:38,706 WARN L293 SmtUtils]: Spent 6.31s on a formula simplification that was a NOOP. DAG size: 382 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:44:39,580 WARN L293 SmtUtils]: Spent 1.14m on a formula simplification. DAG size of input: 343 DAG size of output: 338 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)